W681513 5V SINGLE-CHANNEL VOICEBAND CODEC FOR USB APPLICATIONS Data Sheet -1- Publication Release Date: October, 2005 Revision A11 W681513 1. GENERAL DESCRIPTION The W681513 is a single channel PCM CODEC with pin-selectable -Law or A-Law companding dedicated to the USB accessory market by supporting a derivative 2MHz clock. The device is compliant with the ITU G.712 specification. It operates from a single +5V power supply and is available in 20-pin SOP package option. Functions performed include digitization and reconstruction of voice signals, and band limiting and smoothing filters required for PCM systems. The filters are compliant with ITU G.712 specification. W681513 performance is specified over the industrial temperature range of -40C to +85C. The W681513 includes an on-chip precision voltage reference and an additional power amplifier, capable of driving 300 loads differentially up to a level of 6.3V peak-to-peak. The analog section is fully differential, reducing noise and improving the power supply rejection ratio. The data transfer protocol supports both long-frame and short-frame synchronous communications for PCM applications, and IDL and GCI communications for ISDN applications. W681513 accepts 2MHz master clock rate, and an on-chip pre-scaler automatically determines the division ratio for the required internal clock. Applications 2. FEATURES * Single +5V power supply * Typical power dissipation of 30 mW, power-down mode of 0.5 W * Fully-differential analog circuit design * On-chip precision reference of 1.575 V for a 0 dBm TLP at 600 (775mVRMS) * Push-pull power amplifiers with external gain adjustment with 300 load capability * Master clock rate supports 2.000MHz clock for USB applications * Pin-selectable -Law and A-Law companding (compliant with ITU G.711) * CODEC A/D and D/A filtering compliant with ITU G.712 * Industrial temperature range (-40C to +85C) * Package: 20-pin SOP (SOG) * Pb-Free / RoHS package option available * -2- Soft phones running on a PC (VoInternet): o USB Phones o USB to PSTN Gateway * USB Microphones * USB Headset for PC and Game Consoles W681513 3. BLOCK DIAGRAM Re Int PC cei erf M ve ace Receive PCM Interface BCLKR FSR PCMR G.712 CODEC G.711 /A -Law Tra Int ns PC erf mitM ace Transmit PCM Interface BCLKT FST PCMT PAO+ PAOPAI RO RO+ AO AI+ AI- /A-Law 512 kHz 256 kHz Voltage reference V AG 8 kHz PUI Power Conditioning VDD 2000 kHz, Pre -Scaler -scaler VSS MCLK -3- Publication Release Date: October, 2005 Revision A11 W681513 4. TABLE OF CONTENTS 1. GENERAL DESCRIPTION.................................................................................................................. 2 2. FEATURES ......................................................................................................................................... 2 3. BLOCK DIAGRAM .............................................................................................................................. 3 4. TABLE OF CONTENTS ...................................................................................................................... 4 5. PIN CONFIGURATION ....................................................................................................................... 6 6. PIN DESCRIPTION ............................................................................................................................. 7 7. FUNCTIONAL DESCRIPTION............................................................................................................ 8 7.1. Transmit Path ................................................................................................................................ 8 7.2. Receive Path ................................................................................................................................. 9 7.3. Power Management..................................................................................................................... 10 7.3.1. Analog and Digital Supply ..................................................................................................... 10 7.3.2. Analog Ground Reference Voltage Outpt ............................................................................. 10 7.4. PCM Interface .............................................................................................................................. 10 7.4.1. Long Frame Sync.................................................................................................................. 10 7.4.2. Short Frame Sync ................................................................................................................. 11 7.4.3. General Circuit Interface (GCI) ............................................................................................. 11 7.4.4. Interchip Digital Link (IDL)..................................................................................................... 12 7.4.5. System Timing ...................................................................................................................... 12 8. TIMING DIAGRAMS.......................................................................................................................... 13 9. ABSOLUTE MAXIMUM RATIINGS................................................................................................... 20 9.1. Absolute Maximum Ratings ......................................................................................................... 20 9.2. Operating Conditions ................................................................................................................... 20 10. ELECTRICAL CHARACTERISTICS ............................................................................................... 21 10.1. General Parameters .................................................................................................................. 21 10.2. Analog Signal Level and Gain Parameters ............................................................................... 22 10.3. Analog Distortion and Noise Parameters .................................................................................. 23 10.4. Analog Input and Output Amplifier Parameters......................................................................... 24 10.5. Digital I/O ................................................................................................................................... 26 10.5.1. -Law Encode Decode Characteristics............................................................................... 26 10.5.2. A-Law Encode Decode Characteristics .............................................................................. 27 10.5.3. PCM Codes for Zero and Full Scale ................................................................................... 28 10.5.4. PCM Codes for 0dBm0 Output ........................................................................................... 28 11. TYPICAL APPLICATION CIRCUITS .............................................................................................. 29 12. PACKAGE SPECIFICATION .......................................................................................................... 32 12.2. 20L SOP (SOG)-300mil ............................................................................................................. 32 -4- W681513 13. ORDERING INFORMATION........................................................................................................... 33 14. VERSION HISTORY ....................................................................................................................... 34 -5- Publication Release Date: October, 2005 Revision A11 W681513 5. PIN CONFIGURATION RO+ RO+ PAI PAOPAO+ VDD FSR PCMR BCLKR PUI 1 20 2 19 3 18 4 17 5 6 7 SINGLE CHANNEL CODEC 16 15 14 8 13 9 12 10 11 SOP -6- VAG AI+ AIAO /A /A-Law VSS FST PCMT BCLKT MCLK W681513 6. PIN DESCRIPTION Pin Name Pin No. Functionality RO+ 1 Non-inverting output of the receive smoothing filter. This pin can typically drive a 2 k load to 1.575 volt peak referenced to the analog ground level. RO+ 2 Non-inverting output of the receive smoothing filter. This pin can typically drive a 2 k load to 1.575 volt peak referenced to the analog ground level. PAI 3 This pin is the inverting input to the power amplifier. Its DC level is at the VAG voltage. PAO- 4 Inverting power amplifier output. This pin can drive a 300 load to 1.575 volt peak referenced to the VAG voltage level. PAO+ 5 Non-inverting power amplifier output. This pin can drive a 300 load to 1.575 volt peak referenced to the VAG voltage level. VDD 6 Power supply. This pin should be decoupled to VSS with a 0.1F ceramic capacitor. FSR 7 8 kHz Frame Sync input for the PCM receive section. This pin also selects channel 0 or channel 1 in the GCI and IDL modes. It can also be connected to the FST pin when transmit and receive are synchronous operations. PCMR 8 PCM input data receive pin. The data needs to be synchronous with the FSR and BCLKR pins. BCLKR 9 PCM receive bit clock input pin. This pin also selects the interface mode. The GCI mode is selected when this pin is tied to VSS. The IDL mode is selected when this pin is tied to VDD. This pin can also be tied to the BCLKT when transmit and receive are synchronous operations. PUI 10 Power up input signal. When this pin is tied to VDD, the part is powered up. When tied to VSS, the part is powered down. MCLK 11 System master clock input supporting 2000 kHz only. BCLKT 12 PCM transmit bit clock input pin. PCMT 13 PCM output data transmit pin. The output data is synchronous with the FST and BCLKT pins. FST 14 8 kHz transmit frame sync input. This pin synchronizes the transmit data bytes. VSS 15 This is the supply ground. This pin should be connected to 0V. /A-Law 16 Compander mode select pin. -Law companding is selected when this pin is tied to VDD. A-Law companding is selected when this pin is tied to VSS. AO 17 Analog output of the first gain stage in the transmit path. AI- 18 Inverting input of the first gain stage in the transmit path. AI+ 19 Non-inverting input of the first gain stage in the transmit path. VAG 20 Mid-Supply analog ground pin, which supplies a 2.5 Volt reference voltage for all-analog signal processing. This pin should be decoupled to VSS with a 0.01F to 0.1 F capacitor. This pin becomes high impedance when the chip is powered down. -7- Publication Release Date: October, 2005 Revision A11 W681513 7. FUNCTIONAL DESCRIPTION W681513 is a single-rail, single channel PCM CODEC for voiceband applications. The CODEC complies with the specifications of the ITU-T G.712 recommendation. The CODEC also includes a complete -Law and A-Law compander. The -Law and A-Law companders are designed to comply with the specifications of the ITU-T G.711 recommendation. The block diagram in section 3 shows the main components of the W681513. The chip consists of a PCM interface, which can process long and short frame sync formats, as well as GCI and IDL formats. The pre-scaler of the chip provides the internal clock signals and synchronizes the CODEC sample rate with the external frame sync frequency. The power conditioning block provides the internal power supply for the digital and the analog section, while the voltage reference block provides a precision analog ground voltage for the analog signal processing. The main CODEC block diagram is shown in section 3. VA V AG G + - Receive Path + PAO+ PAO PAI 8 + D/A /A-Contr Control ol Converter w - fC = 3400Hz Hz Smoothi Smoothing ngFilter 1 RO + Smoothing Smoothi ngFilter 2 Transmit Path AO 8 ++ - A/D Converter /A- /A ContrControl ffC == 200Hz 200 C Hz Pass High High Filte Filter Pas f C == 3400Hz 3400 Ant Aliasing --Aliasi AntHz i Filter ng AI+ AI - Ant -Aliasing -Aliasi Filter Figure 7.1 The W681513 Signal Path 7.1. Transmit Path The A-to-D path of the CODEC contains an analog input amplifier with externally configurable gain setting (see application examples in section 11). The device has an input operational amplifier whose output is the input to the encoder section. If the input amplifier is not required for operation it can be powered down and bypassed. In that case a single ended input signal can be applied to the AO pin or the AI- pin. The AO pin becomes high input impedance when the input amplifier is powered down. The input amplifier can be powered down by connecting the AI+ pin to VDD or VSS. The AO pin is selected -8- W681513 as an input when AI+ is tied to VDD and the AI- pin is selected as an input when AI+ is tied to VSS (see Table 7.1). AI+ Input Amplifier Input VDD Powered Down AO 1.2 to VDD-1.2 Powered Up AI+, AI- VSS Powered Down AI- Table 7.1 Input Amplifier Modes of operation When the input amplifier is powered down, the input signal at AO or AI- needs to be referenced to the analog ground voltage VAG. The output of the input amplifier is fed through a low-pass filter to prevent aliasing at the switched capacitor 3.4 kHz low pass filter. The 3.4 kHz switched capacitor low pass filter prevents aliasing of input signals above 4 kHz, due to the sampling at 8 kHz. The output of the 3.4 kHz low pass filter is filtered by a high pass filter with a 200 Hz cut-off frequency. The filters are designed according to the recommendations in the G.712 ITU-T specification. From the output of the high pass filter the signal is digitized. The signal is converted into a compressed 8-bit digital representation with either -Law or ALaw format. The -Law or A-Law format is pin-selectable through the /A-Law pin. The compression format can be selected according to Table 7.2. /A-Law Pin Format VSS A-Law VDD -Law Table 7.2. Pin-selectable Compression Format The digital 8-bit -Law or A-Law samples are fed to the PCM interface for serial transmission at the sample rate supplied by the external frame sync FST. 7.2. Receive Path The 8-bit digital input samples for the D-to-A path are serially shifted in by the PCM interface and converted to parallel data bits. During every cycle of the frame sync FSR, the parallel data bits are fed through the pin-selectable -Law or A-Law expander and converted to analog samples. The mode of expansion is selected by the /A-Law pin as shown in Table 7.2. The analog samples are filtered by a low-pass smoothing filter with a 3.4 kHz cut-off frequency, according to the ITU-T G.712 specification. A sin(x)/x compensation is integrated with the low pass smoothing filter. The output of this filter is buffered to provide the receive output signal RO+. The RO+ output can be externally connected to the PAI pin to provide a differential output with high driving capability at the PAO+ and PAO- pins. By using external resistors (see section 11 for examples), various gain settings of this output amplifier -9- Publication Release Date: October, 2005 Revision A11 W681513 can be achieved. If the transmit power amplifier is not in use, it can be powered down by connecting PAI to VDD. 7.3. POWER MANAGEMENT 7.3.1. Analog and Digital Supply The power supply for the analog and digital parts of the W681513 must be 5V +/- 10%. This supply voltage is connected to the VDD pin. The VDD pin needs to be decoupled to ground through a 0.1 F ceramic capacitor. 7.3.2. Analog Ground Reference Voltage Output The analog ground reference voltage is available for external reference at the VAG pin. This voltage needs to be decoupled to VSS through a 0.01 F ceramic capacitor. 7.4. PCM INTERFACE The PCM interface is controlled by pins BCLKR, FSR, BCLKT & FST. The input data is received through the PCMR pin and the output data is transmitted through the PCMT pin. The modes of operation of the interface are shown in Table 7.3. BCLKR FSR Interface Mode 2.000 MHz 8 kHz Long or Short Frame Sync VSS VSS ISDN GCI with active channel B1 VSS VDD ISDN GCI with active channel B2 VDD VSS ISDN IDL with active channel B1 VDD VDD ISDN IDL with active channel B2 Table 7.3 PCM Interface mode selections 7.4.1. Long Frame Sync The Long Frame Sync or Short Frame Sync interface mode can be selected by connecting the BCLKR or BCLKT pin to a 2.000 MHz clock and connecting the FSR or FST pin to the 8 kHz frame sync. The device synchronizes the data word for the PCM interface and the CODEC sample rate on the positive edge of the Frame Sync signal. It recognizes a Long Frame Sync when the FST pin is - 10 - W681513 held HIGH for two consecutive falling edges of the bit-clock at the BCLKT pin. The length of the Frame Sync pulse can vary from frame to frame, as long as the positive frame sync edge occurs every 125 sec. During data transmission in the Long Frame Sync mode, the transmit data pin PCMT will become low impedance when the Frame Sync signal FST is HIGH or when the 8 bit data word is being transmitted. The transmit data pin PCMT will become high impedance when the Frame Sync signal FST becomes LOW while the data is transmitted or when half of the LSB is transmitted. The internal decision logic will determine whether the next frame sync is a long or short frame sync, based on the previous frame sync pulse. To avoid bus collisions, the PCMT pin will be high impedance for two frame sync cycles after every power down state. More detailed timing information can be found in the interface timing section. 7.4.2. Short Frame Sync The W681513 operates in the Short Frame Sync Mode when the Frame Sync signal at pin FST is HIGH for one and only one falling edge of the bit-clock at the BCLKT pin. On the following rising edge of the bit-clock, the W681513 starts clocking out the data on the PCMT pin, which will also change from high to low impedance state. The data transmit pin PCMT will go back to the high impedance state halfway through the LSB. The Short Frame Sync operation of the W681513 is based on an 8-bit data word. When receiving data on the PCMR pin, the data is clocked in on the first falling edge after the falling edge that coincides with the Frame Sync signal. The internal decision logic will determine whether the next frame sync is a long or short frame sync, based on the previous frame sync pulse. To avoid bus collisions, the PCMT pin will be high impedance for two frame sync cycles after every power down state. More detailed timing information can be found in the interface timing section. 7.4.3. General Circuit Interface (GCI) The GCI interface mode is selected when the BCLKR pin is connected to VSS for two or more frame sync cycles. It can be used as a 2B+D timing interface in an ISDN application. The GCI interface consists of 4 pins: FSC (FST), DCL (BCLKT), Dout (PCMT) & Din (PCMR). The FSR pin selects channel B1 or B2 for transmit and receive. Data transitions occur on the positive edges of the data clock DCL. The Frame Sync positive edge is aligned with the positive edge of the data clock DCLK. The data rate is running half the speed of the bit-clock. The channels B1 and B2 are transmitted consecutively. Therefore, channel B1 is transmitted on the first 16 clock cycles of DCL and B2 is transmitted on the second 16 clock cycles of DCL. For more timing information, see the timing section. - 11 - Publication Release Date: October, 2005 Revision A11 W681513 7.4.4. Interchip Digital Link (IDL) The IDL interface mode is selected when the BCLKR pin is connected to VDD for two or more frame sync cycles. It can be used as a 2B+D timing interface in an ISDN application. The IDL interface consists of 4 pins: IDL SYNC (FST), IDL CLK (BCLKT), IDL TX (PCMT) & IDL RX (PCMR). The FSR pin selects channel B1 or B2 for transmit and receive. The data for channel B1 is transmitted on the first positive edge of the IDL CLK after the IDL SYNC pulse. The IDL SYNC pulse is one IDL CLK cycle long. The data for channel B2 is transmitted on the eleventh positive edge of the IDL CLK after the IDL SYNC pulse. The data for channel B1 is received on the first negative edge of the IDL CLK after the IDL SYNC pulse. The data for channel B2 is received on the eleventh negative edge of the IDL CLK after the IDL SYNC pulse. The transmit signal pin IDL TX becomes high impedance when not used for data transmission and also in the time slot of the unused channel. For more timing information, see the timing section. 7.4.5. System Timing The system can work at 2000 kHz master clock rate only. The system clock is supplied through the master clock input MCLK and can be derived from the bit-clock if desired. An internal pre-scaler is used to generate a fixed 256 kHz and 8 kHz sample clock for the internal CODEC. If the Frame Sync is LOW for the entire frame sync period while the MCLK and BCLK pin clock signals are still present, the W681513 will enter the low power standby mode. Another way to power down is to set the PUI pin to low. When the system needs to be powered up again, the PUI pin needs to be set to HIGH and the Frame Sync pulse needs to be present. It will take two Frame Sync cycles before the pin PCMT will become low impedance. - 12 - W681513 8. TIMING DIAGRAMS TFTRHM TFTRSM TMCKL TMCKH TRISE TFALL MCLK TMCK TFS TFSL FST TFTRH BCLKT 0 TFTRS 1 TFTFH 2 3 TFDTD TBCKH 4 5 6 7 TBDTD PCMT D7 D6 8 THID D5 D4 D3 D2 TBCKL 0 1 TBCK THID D1 D0 MSB LSB TFS TFSL FSR TFRRH BCLKR 0 TFRRS 1 TFRFH 2 3 TBCKH 4 5 6 7 8 TBCKL 0 1 TBCK PCMR D7 MSB TDRS D6 D5 D4 D3 D2 D1 D0 LSB TDRH Figure 8.1 Long Frame Sync PCM Timing - 13 - Publication Release Date: October, 2005 Revision A11 W681513 SYMBOL DESCRIPTION 1/TFS FST, FSR Frequency 1 MIN TYP MAX UNIT --- 8 --- kHz TFSL FST / FSR Minimum LOW Width TBCK sec 1/TBCK BCLKT, BCLKR Frequency 2000 --- 2000 kHz TBCKH BCLKT, BCLKR HIGH Pulse Width 50 --- --- ns TBCKL BCLKT, BCLKR LOW Pulse Width 50 --- --- ns TFTRH BCLKT 0 Falling Edge to FST Rising Edge Hold Time 20 --- --- ns TFTRS FST Rising Edge to BCLKT 1 Falling edge Setup Time 80 --- --- ns TFTFH BCLKT 2 Falling Edge to FST Falling Edge Hold Time 50 --- --- ns TFDTD FST Rising Edge to Valid PCMT Delay Time --- --- 60 ns TBDTD BCLKT Rising Edge to Valid PCMT Delay Time --- --- 60 ns THID Delay Time from the Later of FST Falling Edge, or 10 --- 60 ns BCLKT 8 Falling Edge to PCMT Output High Impedance TFRRH BCLKR 0 Falling Edge to FSR Rising Edge Hold Time 20 --- --- ns TFRRS FSR Rising Edge to BCLKR 1 Falling edge Setup Time 80 --- --- ns TFRFH BCLKR 2 Falling Edge to FSR Falling Edge Hold Time 50 --- --- ns TDRS Valid PCMR to BCLKR Falling Edge Setup Time 0 --- --- ns TDRH PCMR Hold Time from BCLKR Falling Edge 50 --- --- ns Table 8.1 Long Frame Sync PCM Timing Parameters 1 TFSL must be at least TBCK - 14 - W681513 TFTRHM TFTRSM TMCKL TMCKH TRISE TFALL MCLK TMCK TFS TFTFH TFTFS FST TFTRS TFTRH BCLKT -1 0 TBCKH 1 2 3 TBDTD PCMT D7 4 5 6 7 0 8 TBDTD D6 D5 TBCKL TBCK THID D4 D3 D2 1 D1 D0 MSB LSB TFS TFRFH TFRFS FSR TFRRS TFRRH BCLKR -1 0 TBCKH 1 2 3 4 5 6 7 TBCKL 0 8 1 TBCK PCMR D7 MSB TDRS D6 D5 D4 D3 D2 D1 D0 LSB TDRH Figure 8.2 Short Frame Sync PCM Timing - 15 - Publication Release Date: October, 2005 Revision A11 W681513 SYMBOL DESCRIPTION MIN TYP MAX UNIT 1/TFS FST, FSR Frequency --- 8 --- kHz 1/TBCK BCLKT, BCLKR Frequency 2000 --- 2000 kHz TBCKH BCLKT, BCLKR HIGH Pulse Width 50 --- --- ns TBCKL BCLKT, BCLKR LOW Pulse Width 50 --- --- ns TFTRH BCLKT -1 Falling Edge to FST Rising Edge Hold Time 20 --- --- ns TFTRS FST Rising Edge to BCLKT 0 Falling edge Setup Time 80 --- --- ns TFTFH BCLKT 0 Falling Edge to FST Falling Edge Hold Time 50 --- --- ns TFTFS FST Falling Edge to BCLKT 1 Falling Edge Setup Time 50 --- --- ns TBDTD BCLKT Rising Edge to Valid PCMT Delay Time 10 --- 60 ns THID Delay Time from BCLKT 8 Falling Edge to PCMT Output High Impedance 10 --- 60 ns TFRRH BCLKR -1 Falling Edge to FSR Rising Edge Hold Time 20 --- --- ns TFRRS FSR Rising Edge to BCLKR 0 Falling edge Setup Time 80 --- --- ns TFRFH BCLKR 0 Falling Edge to FSR Falling Edge Hold Time 50 --- --- ns TFRFS FSR Falling Edge to BCLKR 1 Falling Edge Setup Time 50 --- --- ns TDRS Valid PCMR to BCLKR Falling Edge Setup Time 0 --- --- ns TDRH PCMR Hold Time from BCLKR Falling Edge 50 --- --- ns Table 8.2 Short Frame Sync PCM Timing Parameters - 16 - W681513 TFS FST TFSFH TFSRS TFSRH BCLKT -1 0 1 TBCKH 2 3 4 5 TBDTD PCMT 6 8 9 THID TBDTD D7 D6 D5 D4 D3 D2 D1 D0 MSB LSB TDRS PCMR 7 10 11 12 LSB 15 16 17 18 TBCK THID TBDTD D7 D6 D5 D4 D3 D2 D1 D0 LSB MSB TDRS D7 D6 D5 D4 D3 D2 D1 D0 14 TBDTD TDRH MSB 13 TBCKL TDRH D7 D6 D5 D4 D3 D2 MSB BCH = 0 B1 Channel D1 D0 LSB BCH = 1 B2 Channel Figure 8.3 IDL PCM Timing SYMBOL DESCRIPTION MIN TYP MAX UNIT 1/TFS FST Frequency --- 8 --- kHz 1/TBCK BCLKT Frequency 2000 --- 2000 kHz TBCKH BCLKT HIGH Pulse Width 50 --- --- ns TBCKL BCLKT LOW Pulse Width 50 --- --- ns TFSRH BCLKT -1 Falling Edge to FST Rising Edge Hold Time 20 --- --- ns TFSRS FST Rising Edge to BCLKT 0 Falling edge Setup Time 60 --- --- ns TFSFH BCLKT 0 Falling Edge to FST Falling Edge Hold Time 20 --- --- ns TBDTD BCLKT Rising Edge to Valid PCMT Delay Time 10 --- 60 ns THID Delay Time from the BCLKT 8 Falling Edge (B1 channel) or BCLKT 18 Falling Edge (B2 Channel) to PCMT Output High Impedance 10 --- 50 ns TDRS Valid PCMR to BCLKT Falling Edge Setup Time 20 --- --- ns TDRH PCMR Hold Time from BCLKT Falling Edge 75 --- --- ns Table 8.3 IDL PCM Timing Parameters - 17 - Publication Release Date: October, 2005 Revision A11 W681513 TFS FST TFSFH TFSRS TFSRH TBCKH TBCKL BCLKT 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 TFDTD PCMT TBDTD TBDTD D7 D6 D5 D4 D3 D2 D1 D0 TDRS D7 D6 D5 D4 D3 D2 D1 D0 LSB TDRS TDRH TDRH D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 MSB THID TBDTD TBCK LSB MSB MSB PCMR THID D1 D0 LSB MSB BCH = 0 B1 Channel LSB BCH = 1 B2 Channel Figure 8.4 GCI PCM Timing SYMBOL DESCRIPTION MIN TYP MAX UNIT 1/TFST FST Frequency --- 8 --- kHz 1/TBCK BCLKT Frequency 2000 --- 2000 kHz TBCKH BCLKT HIGH Pulse Width 50 --- --- ns TBCKL BCLKT LOW Pulse Width 50 --- --- ns TFSRH BCLKT 0 Falling Edge to FST Rising Edge Hold Time 20 --- --- ns TFSRS FST Rising Edge to BCLKT 1 Falling edge Setup Time 60 --- --- ns TFSFH BCLKT 1 Falling Edge to FST Falling Edge Hold Time 20 --- --- ns TFDTD FST Rising Edge to Valid PCMT Delay Time --- --- 60 ns TBDTD BCLKT Rising Edge to Valid PCMT Delay Time --- --- 60 ns THID Delay Time from the BCLKT 16 Falling Edge (B1 channel) or BCLKT 32 Falling Edge (B2 Channel) to PCMT Output High Impedance 10 --- 50 ns TDRS Valid PCMR to BCLKT Rising Edge Setup Time 20 --- --- ns TDRH PCMR Hold Time from BCLKT Rising Edge --- --- 60 ns Table 8.4 GCI PCM Timing Parameters - 18 - W681513 SYMBOL DESCRIPTION 1/TMCK Master Clock Frequency TMCKH TMCK / MCLK Duty Operation TYP MIN Cycle --for 256 kHz HIGH 2000 45% MAX UNIT --- kHz 55% TMCKH Minimum Pulse Width MCLK(512 kHz or Higher) for 50 --- --- ns TMCKL Minimum Pulse Width LOW for MCLK (512 kHz or Higher) 50 --- --- ns TFTRHM MCLK falling Edge to FST Rising Edge Hold Time 50 --- --- ns TFTRSM FST Rising Edge to MCLK Falling edge Setup Time 50 --- --- ns TRISE Rise Time for All Digital Signals --- --- 50 ns TFALL Fall Time for --- --- 50 ns All Digital Signals Table 8.5 General PCM Timing Parameters - 19 - Publication Release Date: October, 2005 Revision A11 W681513 9. ABSOLUTE MAXIMUM RATINGS 9.1. ABSOLUTE MAXIMUM RATINGS Condition Value 0 Junction temperature 150 C Storage temperature range -650C to +1500C Voltage Applied to any pin (VSS - 0.3V) to (VDD + 0.3V) Voltage applied to any pin (Input current limited to +/-20 mA) (VSS - 1.0V) to (VDD + 1.0V) VDD - VSS -0.5V to +6V 1. Stresses above those listed may cause permanent damage to the device. Exposure to the absolute maximum ratings may affect device reliability. Functional operation is not implied at these conditions. 9.2. OPERATING CONDITIONS Condition Value Industrial operating temperature -400C to +850C Supply voltage (VDD) +4.5V to +5.5V Ground voltage (VSS) 0V Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device. - 20 - W681513 10. ELECTRICAL CHARACTERISTICS 10.1. GENERAL PARAMETERS Conditions Min (2) Typ (1) Max (2) Units 0.6 V Symbol Parameters VIL Input LOW Voltage VIH Input HIGH Voltage VOL PCMT Output LOW Voltage IOL = 3 mA VOH PCMT Output HIGH Voltage IOL = -3 mA IDD VDD Current (Operating) - ADC + DAC No Load 6 8 ISB VDD Current (Standby) FST & FSR =Vss ; PUI=VDD 10 100 Ipd VDD Current (Power Down) PUI= Vss 0.1 10 A IIL Input Leakage Current VSS<VIN<VDD +/-10 A IOL PCMT Output Leakage Current VSS<PCMT<VDD +/-10 A 10 pF 15 pF 2.4 V 0.4 VDD - 0.4 V V mA A High Z State CIN Digital Input Capacitance COUT PCMT Output Capacitance PCMT High Z 1. Typical values: TA = 25C , VDD = 5.0 V 2. All min/max limits are guaranteed by Winbond via electrical testing or characterization. Not all specifications are 100 percent tested. - 21 - Publication Release Date: October, 2005 Revision A11 W681513 10.2. ANALOG SIGNAL LEVEL AND GAIN PARAMETERS VDD=5V 10%; VSS=0V; TA=-40C to +85C; all analog signals referred to VAG; MCLK=BCLK= 2MHz; FST=FSR=8 kHz synchronous operation PARAMETER SYM. Absolute Level LABS Max. Transmit Level TXMAX Absolute Gain (0 dBm0 @ 1020 Hz; TA=+25C) CONDITION TYP. 0 dBm0 = 0dBm @ 600 1.096 TRANSMIT (A/D) RECEIVE (D/A) MIN. MAX. MIN. MAX. --- --- --- --- 0.775 UNIT VPK VRMS 3.17 dBm0 for -Law 1.579 --- --- --- --- VPK 3.14 dBm0 for A-Law 1.573 --- --- --- --- VPK GABS 0 dBm0 @ 1020 Hz; TA=+25C 0 -0.25 +0.25 -0.25 +0.25 dB Absolute Gain variation with Temperature GABST TA=0C to TA=+70C 0 -0.03 +0.03 -0.03 +0.03 dB -0.05 +0.05 -0.05 +0.05 Frequency Response, GRTV TA=-40C to TA=+85C Relative to 0dBm0 @ 1020 Hz Gain Variation vs. Level Tone (1020 Hz relative to -10 dBm0) GLT 15 Hz --- --- -40 -0.5 0 50 Hz --- --- -30 -0.5 0 60 Hz --- --- -26 -0.5 0 200 Hz --- -1.0 -0.4 -0.5 0 300 to 3000 Hz --- -0.20 +0.15 -0.20 +0.15 3300 Hz --- -0.35 +0.15 -0.35 +0.15 3400 Hz --- -0.8 0 -0.8 0 3600 Hz --- --- 0 --- 0 4000 Hz --- --- -14 --- -14 4600 Hz to 100 kHz --- --- -32 --- -30 +3 to -40 dBm0 --- -0.3 +0.3 -0.2 +0.2 -40 to -50 dBm0 --- -0.6 +0.6 -0.4 +0.4 -50 to -55 dBm0 --- -1.6 +1.6 -1.6 +1.6 - 22 - dB dB W681513 10.3. ANALOG DISTORTION AND NOISE PARAMETERS VDD=5V 10%; VSS=0V; TA=-40C to +85C; all analog signals referred to VAG; MCLK=BCLK= 2MHz; FST=FSR=8 kHz synchronous operation PARAMETER Total Distortion vs. Level Tone (1020 Hz, -Law, C-Message Weighted) Total Distortion vs. Level Tone (1020 Hz, A-Law, Psophometric Weighted) SYM. DLT CONDITION TRANSMIT (A/D) MIN. TYP. MAX. MIN. TYP. MAX. 36 --- --- 34 --- --- 36 --- --- 36 --- --- -40 dBm0 29 --- --- 30 --- --- -45 dBm0 25 --- --- 25 --- --- +3 dBm0 36 --- --- 34 --- --- 36 --- --- 36 --- --- -40 dBm0 29 --- --- 30 --- --- -45 dBm0 25 --- --- 25 --- --- 4600 Hz to 7600 Hz --- --- --- --- --- -30 7600 Hz to 8400 Hz --- --- --- --- --- -40 8400 Hz to 100000 Hz --- --- --- --- --- -30 +3 dBm0 0 dBm0 to -30 dBm0 DLTA RECEIVE (D/A) 0 dBm0 to -30 dBm0 UNIT dBC dBp dB Spurious Out-Of-Band at RO+ (300 Hz to 3400 Hz @ 0dBm0) DSPO Spurious In-Band (700 Hz to 1100 Hz @ 0dBm0) DSPI 300 to 3000 Hz --- --- -47 --- --- -47 dB Intermodulation Distortion (300 Hz to 3400 Hz -4 to -21 dBm0 DIM Two tones --- --- -41 --- --- -41 dB Crosstalk (1020 Hz @ 0dBm0) DXT --- --- -75 --- --- -75 dBm0 Absolute Group Delay ABS 1200Hz --- --- 360 --- --- 240 sec Group Delay Distortion (relative to group delay @ 1200 Hz) D 500 Hz --- --- 750 --- --- 750 sec 600 Hz --- --- 380 --- --- 370 1000 Hz --- --- 130 --- --- 120 2600 Hz --- --- 130 --- --- 120 2800 Hz --- --- 750 --- --- 750 -Law; C-message --- --- 18 --- --- 13 dBrnc0 A-Law; Psophometric --- --- -68 --- --- -78 dBm0p Idle Channel Noise NIDL - 23 - Publication Release Date: October, 2005 Revision A11 W681513 10.4. ANALOG INPUT AND OUTPUT AMPLIFIER PARAMETERS VDD=5V 10%; VSS=0V; TA=-40C to +85C; all analog signals referred to VAG; PARAMETER SYM. CONDITION MIN. TYP. MAX. UNIT. AI Input Offset Voltage VOFF,AI AI+, AI- --- --- 25 mV AI Input Current IIN,AI AI+, AI- --- 0.1 1.0 A AI Input Resistance RIN,AI AI+, AI- to VAG 10 --- --- M AI Input Capacitance CIN,AI AI+, AI- --- --- 10 pF AI Common Mode Input Voltage Range VCM,AI AI+, AI- 1.2 --- VDD-1.2 V AI Common Mode Rejection Ratio CMRRTI AI+, AI- --- 60 --- dB AI Amp Gain Bandwidth Product GBWTI AO, RLD10k --- 2150 --- kHz AI Amp DC Open Loop Gain GTI AO, RLD10k --- 95 --- dB AI Amp Equivalent Input Noise NTI C-Message Weighted --- -24 --- dBrnC AO Output Voltage Range VTG RLD=10k to VAG 0.5 --- VDD-0.5 RLD=2k to VAG 1.0 --- VDD-1.0 V Load Resistance RLDTGRO AO, RO to VAG 2 --- --- k Load Capacitance CLDTGRO AO, RO --- --- 100 pF AO & RO Output Current IOUT1 0.5 AO,RO+ VDD-0.5 1.0 --- --- mA RO+ Output Resistance RRO+ RO+, 0 to 3400 Hz --- 1 --- RO+ Output Offset Voltage VOFF,RO+ RO+ to VAG --- --- 25 Analog Ground Voltage VAG Relative to VSS 2.429 2.5 2.573 V VAG Output Resistance RVAG Within 25mV change --- 2.5 12.5 Power Supply Rejection Ratio (0 to 100 kHz to VDD, C-message) PSRR Transmit 40 80 --- Receive 40 75 --- PAI Input Offset Voltage VOFF,PAI PAI --- --- 20 mV PAI Input Current IIN,PAI PAI --- 0.05 1.0 A PAI Input Resistance RIN,PAI PAI to VAG 10 --- --- M PAI Amp Gain Bandwidth Product GBWPI PAO- no load --- 1000 --- kHz Output Offset Voltage VOFF,PO PAO+ to PAO- --- --- 50 mV Load Resistance RLDPO PAO+, PAOdifferentially 300 --- --- Load Capacitance CLDPO PAO+, PAOdifferentially --- --- 1000 pF - 24 - mV dBC W681513 PARAMETER SYM. CONDITION MIN. TYP. MAX. 10.0 --- --- mA --- 1 --- -0.2 0 +0.2 dB PO Output Current IOUTPO 0.5 AO,RO+ VDD-0.5 PO Output Resistance RPO PAO+ to PAO- PO Differential Gain GPO RLD=300, +3dBm0, 1 kHz, PAO+ to PAO- PO Differential Signal to Distortion C-Message weighted DPO ZLD=300 45 60 --- ZLD=100nF + 100 --- 40 --- ZLD=100nF + 20 --- 40 --- PSRRP 0 to 4 kHz 40 55 --- O 4 to 25 kHz --- 40 --- PO Power Supply Rejection Ratio (0 to 25 kHz to VDD, Differential out) - 25 - UNIT. dBC dB Publication Release Date: October, 2005 Revision A11 W681513 10.5. DIGITAL I/O 10.5.1. -Law Encode Decode Characteristics Normalized Encode Decision Levels 8159 7903 Normalized Digital Code D7 D6 D5 D4 D3 D2 D1 D0 Sign Chord Chord Chord Step Step Step Step 1 0 0 0 0 0 0 0 4063 1 0 0 0 1 1 1 1 2015 1 0 0 1 1 1 1 1 991 1 0 1 0 1 1 1 1 479 1 0 1 1 1 1 1 1 223 1 1 0 0 1 1 1 1 95 1 1 0 1 1 1 1 1 31 1 1 1 0 1 1 1 1 1 0 33 : : 3 99 : : 35 231 : : 103 495 : : 239 1023 : : 511 2079 : : 1055 4191 : : 2143 8031 : : 4319 Decode Levels 1 1 1 1 1 1 1 0 2 1 1 1 1 1 1 1 1 0 Notes: Sign bit = 0 for negative values, sign bit = 1 for positive values - 26 - W681513 10.5.2. A-Law Encode Decode Characteristics Normalized Encode Decision Levels 4096 3968 Digital Code Normalized D7 D6 D5 D4 D3 D2 D1 D0 Sign Chord Chord Chord Step Step Step Step 1 0 1 0 1 0 1 0 2048 1 0 1 0 0 1 0 1 1024 1 0 1 1 0 1 0 1 512 1 0 0 0 0 1 0 1 256 1 0 0 1 0 1 0 1 128 1 1 1 0 0 1 0 1 64 1 1 1 0 0 1 0 1 0 66 : : 2 132 : : 68 264 : : 136 528 : : 272 1056 : : 544 2112 : : 1088 4032 : : 2048 Decode Levels 1 1 0 1 0 1 0 1 1 Notes: 1. Sign bit = 0 for negative values, sign bit = 1 for positive values 2. Digital code includes inversion of all even number bits - 27 - Publication Release Date: October, 2005 Revision A11 W681513 10.5.3. PCM Codes for Zero and Full Scale -Law Level A-Law Sign bit Chord bits Step bits Sign bit Chord bits Step bits (D7) (D6,D5,D4) (D3,D2,D1,D0) (D7) (D6,D5,D4) (D3,D2,D1,D0) + Full Scale 1 000 0000 1 010 1010 + Zero 1 111 1111 1 101 0101 - Zero 0 111 1111 0 101 0101 - Full Scale 0 000 0000 0 010 1010 10.5.4. PCM Codes for 0dBm0 Output -Law Sample A-Law Sign bit Chord bits Step bits Sign bit Chord bits Step bits (D7) (D6,D5,D4) (D3,D2,D1,D0) (D7) (D6,D5,D4) (D3,D2,D1,D0) 1 0 001 1110 0 011 0100 2 0 000 1011 0 010 0001 3 0 000 1011 0 010 0001 4 0 001 1110 0 011 0100 5 1 001 1110 1 011 0100 6 1 000 1011 1 010 0001 7 1 000 1011 1 010 0001 8 1 001 1110 1 011 0100 - 28 - W681513 11. TYPICAL APPLICATION CIRCUITS VCC 1K 22uF 1.5K U1 17 select 18 MICROPHONE 19 3.9K 1.5K 62K 1.0uF 330pF 20K 3K 20 1 2 3 4 5 SPEAKER AO VDD 330pF 62K FST BCLKT PCMT AIAI+ MCLK VAG RO+ PCMR BCLKR FSR RO+ 14 12 13 8KHz SY NC INPUT 11 2.000 MHz CLOCK IN 8 9 7 PCM INPUT PCM OUTPUT PAI PAOPAO+ W681513 VSS 3.9K u/A PUI 16 10 PCM MODE CONTROL POWER CONTROL 15 1.0uF 6 0.1uF 0.01uF Figure 11.1 A USB VoIP Phone application - 29 - Publication Release Date: October, 2005 Revision A11 W681513 1K 22uF 1.5K C6 330pF R3 3.9K 1.0uF R5 62K AI- AO AI+ MICROPHONE 1.5K VCC R6 62K VAG 1.0uF R4 3.9K C7 330pF R8 3K PAOPAI SPEAKER 0.01uF R9 select R7 20K RO+ PAO+ Figure 11.2 Equivalent Circuit of Figure 11.1 SUGGESTED COMPONENT VALUES BY APPLICATION SCHEMATIC COMPONENT # TELEPHONE HANDSET VoIP PHONE SET R3,4 1K 1K R5,6 27K 91K C6,7 1200 pF 330 pF R9 SELECT SELECT R7 20K 20K R8 3K 3K In the handset application the gain from the handset microphone is set to 27 for the input amplifier. This is because the acoustical chamber in the telephone type handset lets the electret microphone provide an output of ~28 mVRMS. The chamber typically has a gain of 3 over a bare microphone (or one placed with only a small opening to the outside world.) Because of the high sensitivity of the earphone (150 impedance) in a typical handset, the output gain from the Power Amp is set to ~0.16 for a satisfactory listening level. In the VoIP telephone, or small wireless phones, the plastic case is typically too small to provide a reasonable acoustic chamber. Thus the output from the microphone is less than in the previous example. This results in having to set the input gain of the CODEC to ~75 to 90 and in a comparable - 30 - W681513 signal level to the receive telephone handset but, because of the increased gain, the Signal-to-Noise Ratio (SNR) has decreased and the signal sounds noisier. On the receive side, the gain is set as in the previous example. When the Power Amp gain is as low as 0.16 a 32 ohm load speaker can be driven. Resistor R9 sets the sidetone level (the signal fed back to the earpiece from the microphone so the telephone sounds "live") to the level desired by the designer. Capacitors C6 and C7 are introduced for external compensation to keep the input amplifier stable at such high gain figures and prevent oscillation. These capacitors are not needed when the gain is close to unity or less than unity. - 31 - Publication Release Date: October, 2005 Revision A11 W681513 12. PACKAGE SPECIFICATION 12.2. 20L SOP (SOG)-300MIL SMALL OUTLINE PACKAGE (SAME AS SOG & SOIC) DIMENSIONS 1 2 c E HE L 1 1 D 0.2 O A Y SEATING PLANE e GAUGE A b SYMBOL DIMENSION (MM) DIMENSION (INCH) MIN. MAX. MIN. MAX. A 2.35 2.65 0.093 0.104 A1 0.10 0.30 0.004 0.012 b 0.33 0.51 0.013 0.020 c 0.23 0.32 0.009 0.013 E 7.40 7.60 0.291 0.299 D 12.60 13.00 0.496 0.512 e 1.27 BSC 0.050 BSC HE 10.00 10.65 0.394 0.419 Y - 0.10 - 0.004 L 0.40 1.27 0.016 0.050 0 0 8 0 8 - 32 - W681513 13. ORDERING INFORMATION Winbond Part Number Description W681513_ _ Product Family Package Material: W681513 Product Blank = Standard Package G = Pb-free Package Package Type: S = 20-Lead Plastic Small Outline Package (SOG/SOP) When ordering W681513 series devices, please refer to the following part numbers. Part Number W681513S W681513SG - 33 - Publication Release Date: October, 2005 Revision A11 W681513 14. VERSION HISTORY VERSION DATE PAGE DESCRIPTION A3 October 1, 2003 A10 April 2005 33 Add Important Notice A11 October, 2005 2 Added reference to Pb-free RoHS packaging and to VRMS First published version Various Capitalized logic HIGH/LOW 22 Added Reference to VRMS 22, 23 Extended Test conditions 23 Corrected Idle Channel Noise min/max and units. 29-31 Improved Application Diagrams 33 Added G package ordering code - 34 - W681513 Important Notice Winbond products are not designed, intended, authorized or warranted for use as components in systems or equipment intended for surgical implantation, atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, or for other applications intended to support or sustain life. Further more, Winbond products are not intended for applications wherein failure of Winbond products could result or lead to a situation wherein personal injury, death or severe property or environmental damage could occur. Winbond customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Winbond for any damages resulting from such improper use or sales. The information contained in this datasheet may be subject to change without notice. It is the responsibility of the customer to check the Winbond USA website (www.winbond-usa.com) periodically for the latest version of this document, and any Errata Sheets that may be generated between datasheet revisions. - 35 - Publication Release Date: October, 2005 Revision A11