LTC5598 5MHz to 1600MHz High Linearity Direct Quadrature Modulator DESCRIPTION FEATURES n n n n n n n n n n n Frequency Range: 5MHz to 1600MHz High Output IP3: +27.7dBm at 140MHz +22.9dBm at 900MHz Low Output Noise Floor at 6MHz Offset: No Baseband AC Input: -161.2dBm/Hz POUT = 5.5dBm: -160dBm/Hz Low LO Feedthrough: -55dBm at 140MHz High Image Rejection: -50.4dBc at 140MHz Integrated LO Buffer and LO Quadrature Phase Generator 50 Single-Ended LO and RF Ports >400MHz Baseband Bandwidth 24-Lead QFN 4mm x 4mm Package Pin-Compatible with Industry Standard Pin-Out Shut-down Mode The LTC(R)5598 is a direct I/Q modulator designed for high performance wireless applications, including wireless infrastructure. It allows direct modulation of an RF signal using differential baseband I and Q signals. It supports point-to-point microwave link, GSM, EDGE, CDMA, 700MHz band LTE, CDMA2000, CATV applications and other systems. It may also be configured as an image reject upconverting mixer, by applying 90 phase-shifted signals to the I and Q inputs. The I/Q baseband inputs consist of voltage-to-current converters that in turn drive double-balanced mixers. The outputs of these mixers are summed and applied to a buffer, which converts the differential mixer signals to a 50 single-ended buffered RF output. The four balanced I and Q baseband input ports are intended for DC coupling from a source with a common-mode voltage level of about 0.5V. The LO path consists of an LO buffer with single-ended or differential inputs, and precision quadrature generators that produce the LO drive for the mixers. The supply voltage range is 4.5V to 5.25V, with about 168mA current. APPLICATIONS n n n n n n n Point-to-Point Microwave Link Military Radio Basestation Transmitter GSM/EDGE/CDMA2K 700MHz LTE Basestation Transmitter Satellite Communication CATV/Cable Broadband Modulator 13.56MHz/UHF RFID Modulator L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Noise Floor vs RF Output Power and Differential LO Input Power 5MHz to 1600MHz Direct Conversion Transmitter Application VCC LTC5598 I-DAC 1nF x2 4.7F x2 RF = 5MHz TO 1600MHz V-I I-CHANNEL 0o EN PA 90o 10nF Q-CHANNEL Q-DAC BASEBAND GENERATOR V-I 5598 TA01 10nF 50 10nF 470nF VCO/SYNTHESIZER -152 NOISE FLOOR AT 6MHz OFFSET (dBm/Hz) 5V -154 -156 fLO = 140MHz; fBB = 2kHz; CW (NOTE 3) 20dBm 19.3dBm 13.4dBm 10.4dBm 8.4dBm 6.4dBm -158 -160 -162 -14 -12 -10 -8 -6 -4 -2 0 2 4 RF OUTPUT POWER (dBm) 6 8 5598 TA02 5598f 1 LTC5598 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) GND GND BBPI BBMI VCC1 GND TOP VIEW Supply Voltage .........................................................5.6V Common Mode Level of BBPI, BBMI and BBPQ, BBMQ ...........................................................0.6V LOP, LOM Input ....................................................20dBm Voltage on Any Pin Not to Exceed ...................................-0.3V to VCC + 0.3V TJMAX .................................................................... 150C Operating Temperature Range..................- 40C to 85C Storage Temperature Range...................-65C to 150C 24 23 22 21 20 19 EN 1 18 VCC2 GND 2 17 GNDRF LOP 3 16 RF 25 LOM 4 15 NC GND 5 14 GNDRF CAPA 6 GND BBMQ GND 9 10 11 12 GND 8 BBPQ 7 CAPB 13 NC UF PACKAGE 24-LEAD (4mm s 4mm) PLASTIC QFN TJMAX = 150C, JA = 37C/W EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC5598IUF#PBF LTC5598IUF#TRPBF 5598 24-Lead (4mm x 4mm) Plastic QFN -40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ 5598f 2 LTC5598 ELECTRICAL CHARACTERISTICS VCC = 5V, EN = 5V, TA = 25C, PLO = 0dBm, single-ended; BBPI, BBMI, BBPQ, BBMQ common-mode DC voltage VCMBB = 0.5VDC, I&Q baseband input signal = 100kHz CW, 0.8VPP,DIFF each, I&Q 90 shifted (lower side-band selection), unless otherwise noted. (Note 11) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS RF OUTPUT (RF) fRF RF Frequency Range S22, ON RF Output Return Loss 5 to 1600 EN = High, 5MHz to 1600MHz MHz <-20 dB -2 dB fLO = 140MHz, fRF = 139.9MHz GV Conversion Voltage Gain 20 * Log (VRF, OUT, 50/VIN, DIFF, I or Q) 1VPP,DIFF on each I&Q Inputs POUT Absolute Output Power OP1dB Output 1dB Compression 2 dBm 8.5 dBm OIP2 Output 2nd Order Intercept (Notes 4, 5) 74 dBm OIP3 Output 3rd Order Intercept (Notes 4, 6) 27.7 dBm NFloor RF Output Noise Floor No Baseband AC Input Signal (Note 3) POUT = 4.6dBm (Note 3) PLO, SE = 10dBm POUT = 5.5dBm (Note 3) PLO, DIFF = 20dBm -161.2 -154.5 -160 dBm/Hz dBm/Hz dBm/Hz IR Image Rejection (Note 7) -50.4 dBc LOFT LO Feedthrough (Carrier Leakage) EN = High (Note 7) EN = Low (Note 7) -55 -78 dBm dBm fLO = 450MHz, fRF = 449.9MHz GV Conversion Voltage Gain 20 * Log (VRF, OUT, 50/VIN, DIFF, I or Q) -5.0 -2.1 0.5 dB POUT Absolute Output Power 1VPP,DIFF on each I&Q Inputs OP1dB Output 1dB Compression OIP2 Output 2nd Order Intercept OIP3 Output 3rd Order Intercept NFloor RF Output Noise Floor No Baseband AC Input Signal (Note 3) IR Image Rejection (Note 7) -55 dBc LOFT LO Feedthrough (Carrier Leakage) EN = High (Note 7) EN = Low (Note 7) -51 -68 dBm dBm 1.9 dBm 8.4 dBm (Notes 4, 5) 72 dBm (Notes 4, 6) 25.5 dBm -160.9 dBm/Hz fLO = 900MHz, fRF = 899.9MHz GV Conversion Voltage Gain 20 * Log (VRF, OUT, 50/VIN, DIFF, I or Q) -2 dB POUT Absolute Output Power 1VPP,DIFF on each I&Q Inputs 2 dBm OP1dB Output 1dB Compression 8.5 dBm OIP2 Output 2nd Order Intercept (Notes 4, 5) 69 dBm OIP3 Output 3rd Order Intercept (Notes 4, 6) 22.9 dBm NFloor RF Output Noise Floor No Baseband AC Input Signal (Note 3) POUT = 5.2dBm (Note 3) PLO, SE = 10dBm IR Image Rejection (Note 7) -54 dBc LOFT LO Feedthrough (Carrier Leakage) EN = High (Note 7) EN = Low (Note 7) -48 -54 dBm dBm -160.3 -154.5 dBm/Hz dBm/Hz 5598f 3 LTC5598 ELECTRICAL CHARACTERISTICS VCC = 5V, EN = 5V, TA = 25C, PLO = 0dBm, single-ended; BBPI, BBMI, BBPQ, BBMQ common-mode DC voltage VCMBB = 0.5VDC, I&Q baseband input signal = 100kHz CW, 0.8VPP,DIFF each, I&Q 90 shifted (lower side-band selection), unless otherwise noted. (Note 11) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS LO INPUT (LOP) fLO LO Frequency Range 5 to 1600 MHz PLO,DIFF Differential LO Input Power Range -10 to 20 dBm PLO, SE Single-Ended LO Input Power Range -10 to 12 dBm S11, ON LO Input Return Loss EN = High -10.5 dB S11, OFF LO Input Return Loss EN = Low -9.6 dB BASEBAND INPUTS (BBPI, BBMI, BBPQ, BBMQ) BWBB Baseband Bandwidth -3dB Bandwidth >400 MHz Ib,BB Baseband Input Current Single-Ended -68 A RIN, SE Input Resistance Single-Ended -7.4 k VCMBB DC Common-Mode Voltage Externally Applied 0.5 V VSWING Amplitude Swing No Hard Clipping, Single-Ended 0.86 VP-P POWER SUPPLY (VCC1, VCC2) VCC Supply Voltage ICC(ON) Supply Current ICC(OFF) Supply Current, Sleep Mode EN = 0V, ICC1+ ICC2 tON Turn-On Time EN = Low to High (Notes 8, 10) 75 ns tOFF Turn-Off Time EN = High to Low (Notes 9, 10) 10 ns Input High Voltage Input High Current EN = High EN = 5V 43 V A Input Low Voltage Input Low Current EN = Low EN = 0V EN = High, ICC1+ ICC2 4.5 5 5.25 V 130 165 200 mA 0.24 0.9 mA POWER UP/DOWN Enable Sleep Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC5598 is guaranteed functional over the operating temperature range -40C to 85C. Note 3: At 6MHz offset from the LO signal frequency. 100nF between BBPI and BBMI, 100nF between BBPQ and BBMQ. Note 4: Baseband is driven by 2MHz and 2.1MHz tones with 1VPP,DIFF for two-tone signals at each I or Q input (0.5VPP,DIFF for each tone). Note 5: IM2 is measured at LO frequency - 4.1MHz. 2 1 -40 V A Note 6: IM3 is measured at LO frequency - 1.9 MHz and LO frequency - 2.2MHz. Note 7: Amplitude average of the characterization data set without image or LO feedthrough nulling (unadjusted). Note 8: RF power is within 10% of final value. Note 9: RF power is at least 30dB lower than in the ON state. Note 10: External coupling capacitors at pins LOP, LOM and RF are 100pF each. Note 11: Tests are performed as shown in the configuration of Figure 10. The LO power is applied to J3 while J5 is terminated with 50 to ground for single-ended LO drive. 5598f 4 LTC5598 TYPICAL PERFORMANCE CHARACTERISTICS VCC = 5V, EN = 5V, TA = 25C, fRF = fLO - fBB, PLO = 0dBm single-ended, BBPI, BBMI, BBPQ, BBMQ common-mode DC voltage VCMBB = 0.5VDC , I&Q baseband input signal = 100kHz, 0.8VPP,DIFF, two-tone baseband input signal = 2MHz, 2.1MHz, 0.5VPP,DIFF each tone, I&Q 90 shifted (lower side-band selection); fNOISE = fLO - 6MHz; unless otherwise noted. (Note 11) Supply Current vs Temperature Voltage Gain vs RF Frequency Output IP3 vs RF Frequency -1 180 29 27 -2 5.0V 160 150 -15 -3 10 35 TEMPERATURE (C) -5 85 60 10 23 21 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C -4 4.5V 140 -40 25 OIP3 (dBm) VOLTAGE GAIN (dB) SUPPLY CURRENT (mA) 5.25V 170 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C 19 100 RF FREQUENCY (MHz) 17 1000 10 100 RF FREQUENCY (MHz) 1000 5598 G02 5598 G03 5598 G01 Output 1dB Compression vs RF Frequency Output IP2 vs RF Frequency 85 OP1dB (dBm) 70 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C 60 10 6 4 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C 2 100 RF FREQUENCY (MHz) 0 1000 10 100 RF FREQUENCY (MHz) 5598 G04 -40 -50 -60 -70 -70 10 100 LO FREQUENCY (MHz) 1000 5598 G07 1000 -145 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C (NOTE 3) -150 -155 RF Two-Tone Power (Each Tone), IM2 and IM3 vs RF Frequency -40 0 fRF, EACH = fLO - fBB1 -50 -10 fIM3 = fLO + 2*fBB1 + fBB2 -60 -20 fIM3 = fLO - 2*fBB1 + fBB2 -30 -70 -40 -80 -160 -50 10 100 LO FREQUENCY (MHz) 5598 G06 Noise Floor vs RF Frequency (No AC Baseband Input Signal) NOISE FLOOR (dBm/Hz) IMAGE REJECTION (dBc) -30 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C -165 10 100 RF FREQUENCY (MHz) 1000 5598 G08 -60 -90 fIM2 = fLO - fBB1 - fBB2 10 IM2 (dBm), IM3 (dBm) 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C -60 5598 G05 Image Rejection vs LO Frequency -20 -50 1000 PRF,TONE (dBm) 65 LO FEEDTHROUGH (dBm) 8 75 OIP2 (dBm) -40 10 80 55 LO Feedthrough to RF Output vs LO Frequency 100 1000 RF FREQUENCY (MHz) -100 5598 G09 5598f 5 LTC5598 TYPICAL PERFORMANCE CHARACTERISTICS VCC = 5V, EN = 5V, TA = 25C, fRF = fLO - fBB, PLO = 0dBm single-ended, BBPI, BBMI, BBPQ, BBMQ common-mode DC voltage VCMBB = 0.5VDC , I&Q baseband input signal = 100kHz, 0.8VPP,DIFF, two-tone baseband input signal = 2MHz, 2.1MHz, 0.5VPP,DIFF each tone, I&Q 90 shifted (lower side-band selection); fNOISE = fLO - 6MHz; unless otherwise noted. (Note 11) RF Two-Tone Power (Each Tone), IM2 and IM3 vs Baseband Voltage and Temperature (fLO = 900MHz) 0 -40 0 -10 -50 -20 fRF, EACH = fLO -fBB1 fIM3 = fLO - 2*fBB1 + fBB2 fIM3 = fLO + 2*fBB1 + fBB2 fIM2 = fLO - fBB1 - fBB2 -60 -70 -30 -80 -40 -30 -90 -50 0.1 1 I AND Q BASEBAND VOLTAGE (VPP, DIFF, EACH TONE) -50 -10 fIM3 = fLO + 2*fBB1 + fBB2 -20 -60 -30 f IM3 = fLO - 2*fBB1 + fBB2 -70 fIM2 = fLO - fBB1 - fBB2 27 80 25 75 17 10 100 RF FREQUENCY (MHz) 1000 5598 G15 RF Two-Tone Power (Each Tone), IM2 and IM3 vs RF Frequency (PLO = 10dBm) 0 -40 fRF, EACH = fLO - fBB1 fIM3 = fLO + 2*fBB1 + fBB2 PRF, TONE (dBm) IMAGE REJECTION (dBc) LO FEEDTHROUGH (dBm) 5598 G16 100 RF FREQUENCY (MHz) -40 -50 fIM3 = fLO - 2*fBB1 + fBB2 -60 -70 IM2 (dBm), IM3 (dBm) 1000 10 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C -30 100 LO FREQUENCY (MHz) 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C 0 1000 -20 10 4 2 Image Rejection vs LO Frequency (PLO = 10dBm) -40 -70 6 5598 G14 LO Feedthrough to RF Output vs LO Frequency (PLO = 10dBm) 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C 1000 Output 1dB Compression vs RF Frequency (PLO = 10dBm) 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C 5598 G13 -60 100 RF FREQUENCY (MHz) 5598 G12 70 55 1000 -50 10 8 60 100 RF FREQUENCY (MHz) -5 10 65 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C 10 -80 OP1dB (dBm) 85 OIP2 (dBm) OIP3 (dBm) 29 19 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C -4 Output IP2 vs RF Frequency (PLO = 10dBm) 23 -3 5598 G11 Output IP3 vs RF Frequency (PLO = 10dBm) 21 -2 -90 -50 0.1 1 I AND Q BASEBAND VOLTAGE (VPP, DIFF, EACH TONE) 5598 G10 PLO = 10dBm -40 fRF, EACH = fLO - fBB1 -40 -1 VOLTAGE GAIN (dB) 10 PRF,TONE (dBm) -30 Voltage Gain vs RF Frequency (PLO = 10dBm) IM2 (dBm), IM3 (dBm) 10 IM2 (dBm), IM3 (dBm) PRF, TONE (dBm) RF Two-Tone Power (Each Tone), IM2 and IM3 vs Baseband Voltage and Temperature (fLO = 140MHz) fIM2 = fLO - fBB1 - fBB2 10 100 LO FREQUENCY (MHz) 1000 5598 G17 -60 10 100 RF FREQUENCY (MHz) 1000 -100 5598 G18 5598f 6 LTC5598 TYPICAL PERFORMANCE CHARACTERISTICS VCC = 5V, EN = 5V, TA = 25C, fRF = fLO - fBB, fLO = 450MHz, PLO = 0dBm single-ended, BBPI, BBMI, BBPQ, BBMQ common-mode DC voltage VCMBB = 0.5VDC , I&Q baseband input signal = 100kHz, 0.8VPP,DIFF, two-tone baseband input signal = 2MHz, 2.1MHz, 0.5VPP,DIFF each tone, I&Q 90 shifted (lower side-band selection); fNOISE = fLO - 6MHz; unless otherwise noted. (Note 11) Noise Floor vs RF Frequency (PLO = 10dBm, No AC Baseband Input Signal) 0 5V, 25C 5.25V, 25C 4.5V, 25C 5V, -40C 5V, 85C (NOTE 3) -155 -160 -10 C8 = 0 -40C IMAGE REJECTION (dBc) -150 -40 LO FEEDTHROUGH (dBm) NOISE FLOOR (dBm/Hz) -145 Image Rejection vs LO Frequency (PLO = 10dBm) LO Feedthrough to RF Output vs LO Frequency for EN = Low -60 -80 PLO = 10dBm -100 85C PLO = 0dBm -20 -30 -40 -50 -60 C8 = 470nF -120 -70 -165 -140 10 100 RF FREQUENCY (MHz) 10 1000 100 LO FREQUENCY (MHz) Noise Floor vs RF Output Power and Differential LO Input Power 40 30 20 10 -162 -14 -12 -10 -8 -6 -4 -2 0 2 4 RF OUTPUT POWER (dBm) 6 0 8 85oC 25oC -40oC 35 -2.4 -2.3 -2.2 -2.1 GAIN (dB) -2 0 -1.9 Noise Floor Distribution 70 85oC 25oC -40oC 60 NO RF PERCENTAGE (%) 10 25 20 15 5598 G23 0 50 40 30 10 5 -70 -66 -62 -58 -54 -50 -46 -42 -38 LO FEEDTHROUGH (dBm) 85oC 25oC -40oC 20 10 5 24 24.4 24.8 25.2 25.6 26 26.4 26.8 27.2 OIP3 (dBm) 5598 G22 30 PERCENTAGE (%) PERCENTAGE (%) 10 Image Rejection Distribution 40 15 0 15 5598 G21 LO Feedthrough Distribution 20 20 5 5598 G20b 25 25 PERCENTAGE (%) PERCENTAGE (%) NOISE FLOOR AT 6MHz OFFSET (dBm/Hz) 50 -160 30 85oC 25oC -40oC fLO = 140MHz; fBB = 2kHz; CW (NOTE 3) -158 1000 Output IP3 Distribution at 25C 60 -156 100 LO FREQUENCY (MHz) 5598 G20a Gain Distribution -152 20dBm 19.3dBm 13.4dBm 10.4dBm 8.4dBm 6.4dBm 10 5598 G20 5598 G19 -154 -80 1000 -70 -66 -62 -58 -54 -50 -46 -42 IMAGE REJECTION (dBc) 5598 G24 0 -162.4 -162 -161.6 -161.2 -160.8 -160.4 -160 NOISE FLOOR (dBm/Hz) 5598 G25 5598f 7 LTC5598 PIN FUNCTIONS EN (Pin 1): Enable Input. When the Enable Pin voltage is higher than 2 V, the IC is turned on. When the input voltage is less than 1 V, the IC is turned off. If not connected, the IC is enabled. NC (Pins 13, 15): No Connect. These pins are floating. GNDRF (Pins 14, 17): Ground. Pins 14 and 17 are connected to each other internally and function as the ground return for the RF output buffer. They are connected via back-to-back diodes to the exposed pad 25. For best LO suppression performance those pins should be grounded separately from the exposed paddle 25. For best RF performance, pins 14 and 17 should be connected to RF ground. GND (Pins 2, 5, 8, 11, 12, 19, 20, 23 and 25): Ground. Pins 2, 5, 8, 11, 12, 19, 20, 23 and exposed pad 25 are connected to each other internally. For best RF performance, pins 2, 5, 8, 11, 12, 19, 20, 23 and the Exposed Pad 25 should be connected to RF ground. RF (Pin 16): RF Output. The RF output is a DC-coupled single-ended output with approximately 50 output impedance at RF frequencies. An AC coupling capacitor should be used at this pin to connect to an external load. LOP (Pin 3): Positive LO Input. This LO input is internally biased at about 2.3V. An AC de-coupling capacitor should be used at this pin to match to an external 50 source. LOM (Pin 4): Negative LO Input. This input is internally biased at about 2.3V. An AC de-coupling capacitor should be used at this pin via a 50 to ground for best OIP2 performance. VCC (Pins 18, 24): Power Supply. It is recommended to use 1nF and 4.7F capacitors for decoupling to ground on each of these pins. CAPA, CAPB (Pins 6, 7): External capacitor pins. A capacitor between the CAPA and the CAPB pin can be used in order to improve the image rejection for frequencies below 100MHz. A capacitor value of 470nF is recommended. These pins are internally biased at about 2.3V. BBPI, BBMI (Pins 21, 22): Baseband Inputs for the Qchannel, each high input impedance. They should be externally biased at 0.5V common-mode level and not be left floating. Applied common-mode voltage must stay below 0.6VDC. BBMQ, BBPQ (Pins 9, 10): Baseband Inputs for the Q-channel, each high input impedance. They should be externally biased at 0.5V common-mode level and not be left floating. Applied common-mode voltage must stay below 0.6VDC. Exposed Pad (Pin 25): Ground. This pin must be soldered to the printed circuit board ground plane. BLOCK DIAGRAM VCC1 VCC2 GND 20 23 25 24 NC 18 13 15 LTC5598 BBPI 21 V-I BBMI 22 0o EN 1 16 RF 90o BBPQ 10 14 V-I BBMQ 9 GNDRF 17 2 5 8 GND 11 3 4 6 7 LOP LOM CAPA CAPB 12 19 5598 BD GND 5598f 8 LTC5598 APPLICATIONS INFORMATION The LTC5598 consists of I and Q input differential voltageto-current converters, I and Q up-conversion mixers, an RF output buffer, an LO quadrature phase generator and LO buffers. External I and Q baseband signals are applied to the differential baseband input pins, BBPI, BBMI, and BBPQ, BBMQ. These voltage signals are converted to currents and translated to RF frequency by means of double-balanced up-converting mixers. The mixer outputs are combined in an RF output buffer, which also transforms the output impedance to 50. The center frequency of the resulting RF signal is equal to the LO signal frequency. The LO input drives a phase shifter which splits the LO signal into inphase and quadrature LO signals. These LO signals are then applied to on-chip buffers which drive the up-conversion mixers. In most applications, the LOP input is driven by the LO source via an optional matching network, while the LOM input is terminated with 50 to RF ground via a similar optional matching network. The RF output is single-ended and internally 50 matched. Baseband Interface The circuit is optimized for a common mode voltage of 0.5V which should be externally applied. The baseband pins should not be left floating because the internal PNP's base current will pull the common mode voltage higher than the 0.6V limit. This condition may damage the part. In shut-down mode, it is recommended to have a termination to ground or to a 0.5V source with a value lower than 1k. The PNP's base current is about -68A in normal operation. The baseband inputs (BBPI, BBMI, BBPQ, BBMQ) present a single-ended input impedance of about -7.4k each. Because of the negative input impedance, it is important to keep the source resistance at each baseband input low enough such that the parallel value remains positive vs baseband frequency. At each of the four baseband inputs, a capacitor of 4pF in series with 30 is connected to ground. This is in parallel with a PNP emitter follower (see Figure 1). The baseband bandwidth depends on the source impedance. For a 25 source impedance, the baseband bandwidth (-1dB) is about 300MHz. If a 5.6nH series inductor is inserted in each of the four baseband connections, the -1dB baseband bandwidth increases to about 800MHz. It is recommended to include the baseband input impedance in the baseband lowpass filter design. The input impedance of each baseband input is given in Table 1. Table 1. Single-Ended BB Port Input Impedance vs Frequency for EN = High and VCMBB = 0.5VDC FREQUENCY (MHz) BB INPUT IMPEDANCE REFLECTION COEFFICIENT MAG ANGLE 0.1 -10578 - j263 1.01 -0.02 1 -8436 - j1930 1.011 -0.15 2 -6340 - j3143 1.013 -0.36 4 -3672 - j3712 1.014 -0.78 8 -1644 - j2833 1.015 -1.51 16 -527 - j1765 1.016 -2.98 30 -177 - j1015 1.017 -5.48 60 -45.2 - j514 1.017 -11 100 -13.2 - j306 1.014 -18.5 140 -0.2 - j219 1 -25.7 200 4.5 - j151 0.982 -36.6 300 10.4 - j99.4 0.921 -52.9 400 12.3 - j72.4 0.854 -68.2 500 14.7 - j57.5 0.780 -79.9 600 15.5 - j46.3 0.720 -91.4 The baseband inputs should be driven differentially; otherwise, the even-order distortion products may degrade the overall linearity performance. Typically, a DAC will LTC5598 VCC2 = 5V BUFFER RF VCC1 = 5V FROM Q LOMI LOPI BBPI 30 4pF VCMBB = 0.5VDC 4pF 30 BBMI GNDRF 55682 F01 GND Figure 1. Simplified Circuit Schematic of the LTC5598 (Only I-Half is Drawn) 5598f 9 LTC5598 APPLICATIONS INFORMATION be the signal source for the LTC5598. A reconstruction filter should be placed between the DAC output and the LTC5598's baseband inputs. In Figure 2 a typical baseband interface is shown, using a fifth-order lowpass ladder filter. L1A 0mA TO 20mA L2A 0.5VDC R1A 1007 DAC C2 C1 R1B 1007 BBPI R2A 1007 L1B L2B 0mA TO 20mA C3 R2B 1007 0.5VDC GND BBMI 5598 F02 Figure 2. Baseband Interface with 5th Order Filter and 0.5VCM DAC (Only I Channel is Shown) in Table 3. In Table 4 and 5, the LOP port input impedance is given for EN = High and Low under the condition of PLO = 10dBm. Figure 4 shows the LOP port return loss for the standard demo board (schematic is shown in Figure 10) when the LOM port is terminated with 50 to GND. The values of L1, L2, C9 and C10 are chosen such that the bandwidth for the LOP port of the standard demo board is maximized while meeting the LO input return loss S11, ON < -10dB. Table 2. LOP Port Input Impedance vs Frequency for EN = High and PLO = 0dBm (LOM AC Coupled With 50 to Ground). FREQUENCY (MHz) For each baseband pin, a 0 to 1V swing is developed corresponding to a DAC output current of 0mA to 20mA. The maximum sinusoidal single side-band RF output power is about +7.3dBm for full 0V to 1V swing on each I- and Q- channel baseband input (2VPP, DIFF). LO Section The internal LO chain consists of poly-phase phase shifters followed by LO buffers. The LOP input is designed as a single-ended input with about 50 input impedance. The LOM input should be terminated with 50 through a DC blocking capacitor. The LOP and LOM inputs can be driven differentially in case an exceptionally low large-signal output noise floor is required (see graph 5598 G20b). A simplified circuit schematic for the LOP, LOM, CAPA and CAPB inputs is given in Figure 3. A feedback path is implemented from the LO buffer outputs to the LO inputs in order to minimize offsets in the LO chain by storing the offsets on C5, C7 and C8 (see Figure 10). Optional capacitor C8 improves the image rejection below 100MHz (see graph 5598 G20a). Because of the feedback path, the input impedance for PLO = 0dBm is somewhat different than for PLO = 10dBm for the lower part of the operating frequency range. In Table 2, the LOP port input impedance vs frequency is given for EN = High and PLO = 0dBm. For EN = Low and PLO = 0dBm, the input impedance is given REFLECTION COEFFICIENT LO INPUT IMPEDANCE MAG ANGLE 0.1 333 - j10.0 0.739 -0.5 1 318 - j59.9 0.737 -3.3 2 285 - j94.7 0.728 -6.1 4 227 - j120 0.708 -10.6 8 154 - j124 0.678 -18.7 16 89.9 - j95.4 0.611 -33.0 30 60.4 - j60.6 0.420 -41.3 60 54.8 - j35.8 0.489 -51.5 100 43.6 - j24.4 0.261 -89.9 200 37.9 - j17.3 0.235 -113 400 31.8 - j12.4 0.266 -137 800 23.6 - j8.2 0.374 -156 1000 19.8 - j5.5 0.437 -165 1250 16.0 - j1.8 0.515 -175 1500 13.6 + j2.4 0.574 174 1800 12.1 + j7.3 0.618 162 VCC1 LOP LOM CAPB CAPA + 2.8V (4.3V IN SHUTDOWN) 5598 F03 Figure 3. Simplified Circuit Schematic for the LOP, LOM, CAPA and CAPB Inputs. 5598f 10 LTC5598 APPLICATIONS INFORMATION Table 3. LOP Port Input Impedance vs Frequency for EN = Low and PLO = 0dBm (LOM AC Coupled with 50 to Ground). FREQUENCY (MHz) LO INPUT IMPEDANCE 0.1 1376 - j84.4 1 541 - j1593 2 177 - j877 4 75.3 - j452 8 REFLECTION COEFFICIENT Table 5. LOP Port Input Impedance vs Frequency for EN = Low and PLO = 10dBm (LOM AC Coupled with 50 to Ground). MAG ANGLE MAG ANGLE 0.930 -0.3 0.1 454 - j30.5 0.802 -0.9 0.980 -3.2 1 423 - j102 0.780 -3.2 0.977 -6.2 2 365 - j165 0.796 -5.9 0.965 -12.2 4 249 - j219 0.798 -11.4 49.2 - j228 0.918 -23.6 8 117 - j179 0.781 -22.4 16 43.3 - j117 0.784 -41.8 16 60.7 - j106 0.697 -40.3 30 40.7 - j64.1 0.585 -62.7 30 43.1 - j62.0 0.559 -62.4 60 39.1 - j34.6 0.382 -86 100 37.6 - j23.8 0.296 -102 200 33.4 - j16.4 0.275 -124 400 27.5 - j11.1 0.320 -145 800 20.1 - j4.9 0.430 -167 1000 17.5 - j1.6 0.479 -176 1250 15.3 + j2.1 0.532 175 1500 13.8 + j5.6 0.571 167 1800 12.8 + j9.7 0.605 157 60 38.6 - j34.6 0.386 -86.7 100 37.6 - j23.9 0.297 -102 200 33.5 - j16.5 0.274 -124 400 27.6 - j11.3 0.319 -145 800 20.2 - j5.1 0.429 -166 1000 17.7 - j1.7 0.478 -175 1250 15.2 + j2.0 0.533 175 1500 13.9 + j5.4 0.570 167 1800 12.9 + j9.5 0.604 158 Table 4. LOP Port Input Impedance vs Frequency for EN = High and PLO = 10dBm (LOM AC Coupled with 50 to Ground). LO INPUT IMPEDANCE 0.1 1 0 REFLECTION COEFFICIENT MAG ANGLE 360-j14.8 0.756 -0.7 349-j70.5 0.758 -3.2 2 311-j113 0.752 -6.0 4 240-j148 0.739 -10.9 8 148-j146 0.715 -19.7 16 81.3-j102 0.641 -35.2 30 55.4-j61.6 0.506 -54.7 60 45.7-j34.4 0.341 -77.4 100 43.0-j24.1 0.261 -91.6 200 38.0-j17.1 0.234 -114 400 32.0-j12.5 0.265 -137 800 23.6-j8.3 0.374 -156 1000 19.8-j5.6 0.438 -165 1250 15.8-j1.7 0.520 -176 1500 13.5+j2.4 0.575 174 1800 12.0+j7.3 0.619 162 -5 RETURN LOSS (dB) FREQUENCY (MHz) LO INPUT IMPEDANCE REFLECTION COEFFICIENT FREQUENCY (MHz) -10 -15 EN = LOW; PLO = 0dBm EN = LOW; PLO = 10dBm EN = HIGH; PLO = 0dBm EN = HIGH; PLO = 10dBm C9, C10: 2.2pF; L1, L2: 3.3nH; C5, C7: 10nF -20 -25 1 100 10 FREQUENCY (MHz) 1000 5598 F04 Figure 4. LOP Port Return Loss vs Frequency for Standard Board (See Figure 10) 5598f 11 LTC5598 APPLICATIONS INFORMATION The LOP port return loss for the low end of the operating frequency range can be optimized using extra 120 terminations at the LO inputs (replace C9 and C10 with 120 resistors, see Figure 10), and is shown in Figure 5. -4 C9, C10: 120; L1, L2: 0; C5, C7: 100nF EN = LOW; PLO = 0dBm RETURN LOSS (dB) -6 EN = LOW; PLO = 10dBm -5 -10 The large-signal noise figure can be improved with a higher LO input power. However, if the LO input power is too large and causes internal clipping in the phase shifter section, the image rejection can be degraded rapidly. This clipping point depends on the supply voltage, LO frequency, temperature and single-ended vs differential LO drive. At fLO = 140MHz, VCC = 5V, T = 25C and single-ended LO drive, this clipping point is at about 16.6dBm. For 4.5V it lowers to 14.6dBm. For differential drive with VCC = 5V it is about 20dBm. The differential LO port input impedance for EN = High and PLO = 10dBm is given in Table 6. -12 EN = HIGH; PLO = 10dBm EN = HIGH; PLO = 0dBm -14 1 100 10 FREQUENCY (MHz) 1000 Table 6. LOP - LOM Port Differential Input Impedance vs Frequency for EN = High and PLO = 10dBm FREQUENCY (MHz) LO DIFFERENTIAL INPUT IMPEDANCE Figure 5. LO Port Return Loss vs Frequency Optimized for Low Frequency (See Figure 10) 0.1 642 - j25.7 1.0 626 - j112 The LOP port return loss for the high end of the operating frequency range can be optimized using slightly different values for C9, C10 and L1, L2 (see Figure 6). 2.0 572 - j204 4.0 429 - j305 8.0 222 - j287 16 102 - j181 30 64.2 - j104 60 50.9 - j58.9 100 46.2 - j40.2 200 37.4 - j28.6 400 28.3 - j19.4 800 20.0 - j10.6 1000 17.5 - j7.9 1250 16.6 - j2.7 1500 17.3 + j3.3 1800 20.6 + j10.2 5598 F05 0 RETURN LOSS (dB) -10 EN = LOW -20 EN = HIGH -30 C9, C10: 2.7pF; L1, L2: 1.5nH; C5, C7: 10nF -40 1400 1600 1800 2000 1000 1200 FREQUENCY (MHz) 5598 F06 Figure 6. LO Port Return Loss vs Frequency Optimized for High Frequency (See Figure 10) The third-harmonic rejection on the applied LO signal is recommended to be equal or better than the desired image rejection performance since third-harmonic LO content can degrade the image rejection severely. Image rejection is not sensitive to second-harmonic LO content. RF Section After upconversion, the RF outputs of the I and Q mixers are combined. An on-chip buffer performs internal differential to single-ended conversion, while transforming the output impedance to 50. Table 7 shows the RF port output impedance vs frequency for EN = High. 5598f 12 LTC5598 APPLICATIONS INFORMATION Table 7. RF Output Impedance vs Frequency for EN = High FREQUENCY (MHz) RF OUTPUT IMPEDANCE REFLECTION COEFFICIENT MAG ANGLE 0.1 59.0 - j0.6 0.083 -3.6 1 58.5 - j2.1 0.081 -12.7 2 57.3 - j3.5 0.076 -23.6 4 54.6 - j4.5 0.061 -41.6 8 51.9 - j3.6 0.040 -60.8 16 50.5 - j2.1 0.022 -74.8 30 50.2 - j1.1 0.011 -80 60 50 - j0.5 0.005 -86.5 100 50 - j0.2 0.002 -84.9 200 49.7 + j0 0.003 177.4 400 48.9 + j0.3 0.011 162 800 46.1 + j0.4 0.041 173.3 1000 44.5 + j0.2 0.058 178 1250 42.8 + j0 0.077 -179.7 1500 41.2 - j0.1 0.097 -179.4 1800 39.9 + j0.4 0.113 177.4 must be below 1V. If the EN pin is not connected, the chip is enabled. This EN = High condition is assured by the 125k on-chip pull-up resistor. It is important that the voltage at the EN pin does not exceed VCC by more than 0.3V. Should VCC2 1k 4.6V FROM INTERNAL MIXERS 1V INTERNAL BIAS EN = LOW -10 RETURN LOSS (dB) 100 ANGLE 82.3 - j1223 0.995 -4.6 200 51.1 - j618 0.987 -9.2 400 35.3 - j310 0.965 -18.1 800 24.4 - j148 0.906 -36.6 1000 20.4 - j114 0.878 -46.4 1250 17 - j87 0.847 -58.4 1500 14.7 - j68 0.818 -70.7 1800 13.1 - j54 0.785 -84.3 In Figure 7 the simplified circuit schematic of the RF output buffer is drawn. A plot of the RF port return loss vs frequency is drawn in Figure 8 for EN = High and Low. 5598 F07 0 REFLECTION COEFFICIENT MAG 48 1k Figure 7. Simplified Circuit Schematic of the RF Output Table 8. RF Output Impedance vs Frequency for EN = Low LO INPUT IMPEDANCE RF 1.8V The RF port output impedance for EN = Low is given in Table 8. It is roughly equivalent to a 1.3pF capacitor to ground. FREQUENCY (MHz) 2.8V 48 -20 EN = HIGH -30 -40 -50 C6 = 220nF, SEE FIGURE 10 -60 100 10 FREQUENCY (MHz) 1 1000 5598 F08 Figure 8. RF Port Return Loss vs Frequency VCC1 125k 3V 50k EN 2V INTERNAL ENABLE CIRCUIT Enable Interface Figure 9 shows a simplified schematic of the EN pin interface. The voltage necessary to turn on the LTC5598 is 2V. To disable (shut down) the chip, the enable voltage 5598 F09 Figure 9: EN Pin Interface 5598f 13 LTC5598 APPLICATIONS INFORMATION this occur, the supply current could be sourced through the EN pin ESD protection diodes, which are not designed to carry the full supply current, and damage may result. Evaluation Board Figure 10 shows the evaluation board schematic. A good ground connection is required for the exposed pad. If this is not done properly, the RF performance will degrade. Additionally, the exposed pad provides heat sinking for the part and minimizes the possibility of the chip overheating. Resistors R1 and R2 reduce the charging current in capacitors C1 and C4 (see Figure 10) and will reduce supply ringing during a fast power supply ramp-up in case an inductive cable is connected to the VCC and GND turrets. For EN = High, the voltage drop over R1 and R2 is about 0.15V. If a power supply is used that ramps up slower than 10V/s and limits the overshoot on the supply below 5.6V, R1 and R2 can be omitted. Figure 11. Component Side of Evaluation Board The LTC5598 can be used for base-station applications with various modulation formats. Figure 13 shows a typical application. J2 J1 BBPI BBMI VCC C1 4.7F RF LOM NC GND GNDRF CAPB C10 2.2pF 7 8 9 NC 10 11 12 17 J4 16 RF OUT 15 C6 10nF 14 13 GND 25 C8 470nF U1 LTC5598 J6 GND C4 4.7F 18 GND CAPA GND 6 GNDRF BBPQ 5 C7 10nF VCC2 LOP BBMQ L2 3.3nH C3 1nF GND GND J5 LOM GND 4 GND 3 EN BBPI 2 BBMI LOP 1 C5 L1 10nF 3.3nH GND J3 R2 5.6 24 23 22 21 20 19 EN VCC1 C9 2.2pF R1 1 C2 1nF BBMQ J7 BBPQ BOARD NUMBER: DC1455A Figure 12. Bottom Side of Evaluation Board 5598 F10 Figure 10. Evaluation Circuit Schematic 5598f 14 LTC5598 APPLICATIONS INFORMATION 5V 1nF x2 VCC 18, 24 I-DAC 22 V-I NC I-CHANNEL 0o 1 EN 9 BASEBAND GENERATOR RF = 5MHz TO 1600MHz 13, 15 16 90o 10 Q-DAC 4.7F x2 LTC5598 21 PA 10nF Q-CHANNEL 14, 17 V-I 3 4 2, 5, 8, 11, 12, 19, 20, 23, 25 6 7 5598 F13 10nF 10nF 50 470nF VCO/SYNTHESIZER Figure 13: 5MHz to 1600MHz Direct Conversion Transmitter Application PACKAGE DESCRIPTION UF Package 24-Lead (4mm x 4mm) Plastic QFN (Reference LTC DWG # 05-08-1697) 0.70 p 0.05 4.50 p 0.05 2.45 p 0.05 3.10 p 0.05 (4 SIDES) PACKAGE OUTLINE 0.25 p 0.05 0.50 BSC RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 4.00 p 0.10 (4 SIDES) BOTTOM VIEW--EXPOSED PAD R = 0.115 TYP 0.75 p 0.05 PIN 1 NOTCH R = 0.20 TYP OR 0.35 s 45o CHAMFER 23 24 PIN 1 TOP MARK (NOTE 6) 0.40 p 0.10 1 2 2.45 p 0.10 (4-SIDES) (UF24) QFN 0105 0.200 REF 0.00 - 0.05 0.25 p 0.05 0.50 BSC NOTE: 1. DRAWING PROPOSED TO BE MADE A JEDEC PACKAGE OUTLINE MO-220 VARIATION (WGGD-X)--TO BE APPROVED 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE, IF PRESENT 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 5598f Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 15 LTC5598 RELATED PARTS PART NUMBER Infrastructure LT5514 DESCRIPTION COMMENTS Ultralow Distortion, IF Amplifier/ADC Driver with Digitally Controlled Gain 40MHz to 900MHz Quadrature Demodulator 1.5GHz to 2.4GHz High Linearity Direct Quadrature Modulator 850MHz Bandwidth, 47dBm OIP3 at 100MHz, 10.5dB to 33dB Gain Control Range LT5519 0.7GHz to 1.4GHz High Linearity Upconverting Mixer 17.1dBm IIP3 at 1GHz, Integrated RF Output Transformer with 50 Matching, Single-Ended LO and RF Ports Operation LT5520 1.3GHz to 2.3GHz High Linearity Upconverting Mixer LT5521 10MHz to 3700MHz High Linearity Upconverting Mixer 600MHz to 2.7GHz High Signal Level Downconverting Mixer 15.9dBm IIP3 at 1.9GHz, Integrated RF Output Transformer with 50 Matching, Single-Ended LO and RF Ports Operation 24.2dBm IIP3 at 1.95GHz, NF = 12.5dB, 3.15V to 5.25V Supply, Single-Ended LO Port Operation LT5517 LT5518 LT5522 LT5527 LT5528 LT5554 LT5557 LT5560 LT5568 400MHz to 3.7GHz High Signal Level Downconverting Mixer 1.5GHz to 2.4GHz High Linearity Direct Quadrature Modulator Broadband Ultra Low Distortion 7-Bit Digitally Controlled VGA 400MHz to 3.8GHz High Signal Level Downconverting Mixer Ultra-Low Power Active Mixer 700MHz to 1050MHz High Linearity Direct Quadrature Modulator LT5571 620MHz - 1100MHz High Linearity Quadrature Modulator LT5572 1.5GHz to 2.5GHz High Linearity Direct Quadrature Modulator LT5575 800MHz to 2.7GHz High Linearity Direct Conversion I/Q Demodulator LT5579 1.5GHz to 3.8GHz High Linearity Upconverting Mixer RF Power Detectors LTC(R)5505 RF Power Detectors with >40dB Dynamic Range LTC5507 100kHz to 1000MHz RF Power Detector LTC5508 300MHz to 7GHz RF Power Detector LTC5509 300MHz to 3GHz RF Power Detector LTC5530 300MHz to 7GHz Precision RF Power Detector LTC5531 300MHz to 7GHz Precision RF Power Detector LTC5532 300MHz to 7GHz Precision RF Power Detector LT5534 50MHz to 3GHz Log RF Power Detector with 60dB Dynamic Range LTC5536 LT5537 LT5538 Precision 600MHz to 7GHz RF Power Detector with Fast Comparator Output Wide Dynamic Range Log RF/IF Detector 3.8GHz Wide Dynamic Range Log Detector LT5570 2.7GHz RMS Power Detector LT5581 40dB Dynamic Range RMS Detector 21dBm IIP3, Integrated LO Quadrature Generator 22.8dBm OIP3 at 2GHz, -158.2dBm/Hz Noise Floor, 50 Single-Ended RF and LO Ports, 4-Channel W-CDMA ACPR = -64dBc at 2.14GHz 4.5V to 5.25V Supply, 25dBm IIP3 at 900MHz, NF = 12.5dB, 50 Single-Ended RF and LO Ports IIP3 = 23.5dBm and NF = 12.5dBm at 1900MHz, 4.5V to 5.25V Supply, ICC = 78mA, Conversion Gain = 2dB. 21.8dBm OIP3 at 2GHz, -159.3dBm/Hz Noise Floor, 50, 0.5VDC Baseband Interface, 4-Channel W-CDMA ACPR = -66dBc at 2.14GHz 48dBm OIP3 at 200MHz, 1.4nV/Hz Input-Referred Noise, 2dB to 18dB Gain Range, 0.125dB Gain Step Size IIP3 = 23.7dBm at 2600MHz, 23.5dBm at 3600MHz, ICC = 82mA at 3.3V 10mA Supply Current, 10dBm IIP3, 10dB NF, Usable as Up- or Down-Converter. 22.9dBm OIP3 at 850MHz, -160.3dBm/Hz Noise Floor, 50, 0.5VDC Baseband Interface, 3-Ch CDMA2000 ACPR = -71.4dBc at 850MHz 21.7dBm OIP3 at 900MHz, -159dBm/Hz Noise Floor, High-Ohmic 0.5VDC Baseband Interface 21.6dBm OIP3 at 2GHz, -158.6dBm/Hz Noise Floor, High-Ohmic 0.5VDC Baseband Interface, 4-Ch W-CDMA ACPR = -67.7dBc at 2.14GHz 50, Single-Ended RF and LO Ports, 28dBm IIP3 at 900MHz, 13.2dBm P1dB, 0.04dB I/Q Gain Mismatch, 0.4 I/Q Phase Mismatch 27.3dBm OIP3 at 2.14GHz, 9.9dB Noise Floor, 2.6dB Conversion Gain, -35dBm LO Leakage 300MHz to 3GHz, Temperature Compensated, 2.7V to 6V Supply 100kHz to 1GHz, Temperature Compensated, 2.7V to 6V Supply 44dB Dynamic Range, Temperature Compensated, SC70 Package 36dB Dynamic Range, Low Power Consumption, SC70 Package Precision VOUT Offset Control, Shutdown, Adjustable Gain Precision VOUT Offset Control, Shutdown, Adjustable Offset Precision VOUT Offset Control, Adjustable Gain and Offset 1dB Output Variation over Temperature, 38ns Response Time, Log Linear Response 25ns Response Time, Comparator Reference Input, Latch Enable Input, -26dBm to +12dBm Input Range Low Frequency to 1GHz, 83dB Log Linear Dynamic Range 75dB Dynamic Range, 1dB Output Variation Over Temperature Fast Responding, up to 60dB Dynamic Range, 0.3dB Accuracy Over Temperature 10MHz to 6GHz, 1dB Accuracy Over Temperature, 1.4mA at 3.3V Supply 5598f 16 Linear Technology Corporation LT 0509 * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com (c) LINEAR TECHNOLOGY CORPORATION 2009