DATA SHEET SKY12322-86LF: GaAs Digital Attenuator 500 MHz-4 GHz 5 Bits, 0.5 dB LSB Features Functional Block Diagram Broadband: 500 MHz-4 GHz Single positive control voltage: 2.7-5.5 V Low current consumption: <100 A @ 3 V Small MSOP-10 package Least significant bit attenuation: 0.5 dB Attenuation range: 15.5 dB High Input IP3: 45 dBm Available lead (Pb)-free and RoHS-compliant MSL-1 @ 260 C per JEDEC J-STD-020 RF Input/Output V1 0.5 dB 1 dB V2 V3 2 dB V4 4 dB V5 8 dB Applications Transceiver transmit automatic level control or receive automatic gain control in GSM, CDMA, WCDMA, WLAN, Bluetooth(R), Zigbee(R), land mobile radio base stations or terminal equipment General-purpose signal attenuation in telecommunications and instrumentation applications RF Input/Output Description The SKY12322-86LF is a monolithic GaAs, binary-weighted, 5-bit, single-positive-control voltage digital attenuator which operates from 500 MHz to 4 GHz. The attenuator has a least significant bit (LSB) of 0.5 dB and total attenuation of 15.5 dB. The two RF ports are bilateral; each can be used as the RF input or the RF output. This attenuator requires an external supply voltage of 2.7-5.5 V. DC power consumption is very low, 100 A maximum with control voltage and supply voltage of 3 V. The switch can operate over the temperature range of -40 C to +85 C. An evaluation board is available upon request. NEW Skyworks offers lead (Pb)-free, RoHS (Restriction of Hazardous Substances)-compliant packaging. The SKY12322-86LF is comprised of 5 fixed attenuators in cascade, each of which having a shunt bypass switch. Beginning at the LSB, which is 0.5 dB, each succeeding fixed attenuator produces twice the attenuation of the preceding stage. The state of each bypass switch is controlled by the logic level voltage applied to the associated control voltage input; a logic high voltage closes the associated switch, thereby bypassing that fixed attenuator stage, and a logic low opens the switch to force the input signal to that stage through the associated attenuator. BUY NOW Innovation to GoTM Now available for purchase online. Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 200273 Rev. B * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * July 31, 2006 1 DATA SHEET * SKY12322-86LF Electrical Specifications at 25C VCTL = 0 V/3 V, T = 25 C, PINPUT = 0 dBm, Z0 = 50 , unless otherwise noted Parameter Frequency Insertion loss Min. 500 MHz-1 GHz 1-2 GHz 2-3 GHz 3-4 GHz Attenuation range (1) Attenuation accuracy(1) 500 MHz-1 GHz 1-3 GHz 3-4 GHz Return loss 500 MHz-4 GHz Typ. Max. Unit 1.4 1.5 2.3 3.0 2.0 2.5 3.0 3.5 dB dB dB dB 15.5 dB (0.2 + 3% of attenuation setting in dB) (0.3 + 5% of attenuation setting in dB) (0.5 + 5% of attenuation setting in dB) dB 10 20 dB Min. Typ. dB dB 1. Attenuation referenced to insertion loss. Operating Characteristics at 25C VCTL = 0 V/3 V, T = 25 C, PINPUT = 0 dBm, Z0 = 50 , unless otherwise noted Parameter Condition Switching characteristics Rise, fall On, off Video feedthru 10/90% or 90/10% RF 50% CTL to 90/10% RF TRISE = 1 ns, BW = 500 MHz Frequency Max. Unit 150 300 70 ns ns mV Input power for 1 dB compression VLOW = 0 V, VHIGH = 3 V VLOW = 0 V, VHIGH = 5 V 0.9-4.0 GHz 0.9-4.0 GHz 21 27 dBm dBm Intermodulation intercept point (IP3) For two-tone input power 5 dBm, f = 1 MHz VLOW = 0 V, VHIGH = 3 V VLOW = 0 V, VHIGH = 5 V 0.9-4.0 GHz 0.9-4.0 GHz 45 45 dBm dBm Thermal resistance 25 Supply voltage Control voltages VHIGH - 0.2 C/W VHIGH + 0.2 VLOW = 0 V @ 20 A max. VHIGH = 3 V @ 100 A max. to 5 V @ 200 A max. VHIGH = 0.2 < VS < VHIGH + 0.2 V Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 2 July 31, 2006 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 200273 Rev. B V DATA SHEET * SKY12322-86LF Typical Performance Data 0 0 -1 1 dB 8 dB 2 dB 15.5 dB -5 -2 Attenuation (dB) Insertion Loss (dB) 0.5 dB 4 dB -3 -4 -10 -15 -5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 -20 Frequency (GHz) 0 0.5 1.0 Insertion Loss vs. Frequency 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Frequency (GHz) Attenuation vs. Frequency, Normalized to Insertion Loss 0.5 dB 4 dB 2 1 dB 8 dB IL 2 dB 15.5 dB 2 dB 15.5 dB 1 dB 8 dB -5 1 -10 Return Loss (dB) Attenuation Error (dB) 0 0.5 dB 4 dB 0 -1 -15 -20 -25 -30 -35 -2 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Frequency (GHz) Attenuation vs. Frequency, Normalized to Insertion Loss 4.5 -40 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Frequency (GHz) Insertion Loss vs. Frequency Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 200273 Rev. B * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * July 31, 2006 3 DATA SHEET * SKY12322-86LF Absolute Maximum Ratings Pin Out Characteristic Value RF input power 1 W for f > 500 MHz, VCTL = 0/8 V 0.5 W for f < 500 MHz, VCTL = 0/8 V Supply voltage VHIGH 0.2 V Control voltage -0.2 V < VC < 8 V Operating temperature -40 C to +85 C Storage temperature -65 C to +150 C Truth Table V1 V2 V3 V4 V5 Nominal Attenuation VHIGH VHIGH VHIGH VHIGH VHIGH Reference I.L. VLOW VHIGH VHIGH VHIGH VHIGH 0.5 dB VHIGH VLOW VHIGH VHIGH VHIGH 1 dB VHIGH VHIGH VLOW VHIGH VHIGH 2 dB VHIGH VHIGH VHIGH VLOW VHIGH 4 dB VHIGH VHIGH VHIGH VHIGH VLOW 8 dB VLOW VLOW VLOW VLOW VLOW 15.5 dB 1 V2 2 V3 3 V4 4 V5 5 0.5 dB 10 1 dB Performance is guaranteed only under the conditions listed in the specifications table and is not guaranteed under the full range(s) described by the Absolute Maximum specifications. Exceeding any of the absolute maximum/minimum specifications may result in permanent damage to the device and will void the warranty. CAUTION: Although this device is designed to be as robust as possible, ESD (Electrostatic Discharge) can damage this device. This device must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industry-standard ESD precautions must be employed at all times. V1 RF Input/Output 9 GND 8 GND 4 dB 7 GND 8 dB 6 RF Input/Output 2 dB Pin Descriptions Pin Number Pin Name Description 1 V1 Control Voltage - High Impedance control voltage input for 0.5 dB weighted bit (LSB) 2 V2 Control Voltage - High Impedance control voltage input for 1 dB weighted bit 3 V3 Control Voltage - High Impedance control voltage input for 2 dB weighted bit 4 V5 Control Voltage - High Impedance control voltage input for 4 dB weighted bit 5 V5 Control Voltage - High Impedance control voltage input for 8 dB weighted bit (MSB) 6 J2 RF Input/Output - RF input or output port, supply voltage input 7, 8, 9 GND Equipotential Point - Equipotential points for control voltages and RF circuits. Must be connected to pcb ground via lowest possible impedance 10 J1 RF Input/Output - RF input or output port 3 V < VHIGH < 5 V, VS = VHIGH 0.2 V, 0 < VLOW < 0.2 V. Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 4 July 31, 2006 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 200273 Rev. B DATA SHEET * SKY12322-86LF Evaluation Board The evaluation board for SKY12322-86 allows the part to be fully exercised. The RF signal may be applied to J1 or to J2 without change in performance. The supply voltage (VS) is applied to pin 6 via R1. DC blocking capacitors (C1 and C2) are required at the RF ports. The values of R1, C1 and C2 are shown in Evaluation Board Components Table. The attenuation produced by the SKY12322-86 is determined by the voltages applied to the high impedance control voltage ports V1 through V5. Each control voltage port determines whether its asso- ciated attenuation bit, as listed in the Truth Table, is switched into or out of the RF signal path. Each of these control voltage ports must be held at 0 V (VLOW) or at VS 0.2 V (VHIGH). The supply voltage must be within 0.2 V of VHIGH or damage may result. Any combination of VHIGH and VLOW may be applied to ports V1 through V5. For example, if the desired attenuation value is 5.5 dB, VLOW is applied to the 0.5 dB, 1 dB and 4 dB voltage control ports, which are V1, V2 and V4, respectively. VHIGH is applied to the remaining voltage control ports to ensure that their attenuation bits are not switched in to the RF signal path. Evaluation Circuit PCB V5 V4 V3 V2 V1 5 4 3 2 1 SKY12322-86 6 J2 7 8 9 10 C1 C2 J1 R1 VS Evaluation Board Components MSOP-10 Component Description Default C1, C2 DC blocking capacitor 47 pF, size 0402 R1 RF block 10k , size 0402 U1 GaAs digital attenuator J1, J2 SMA connectors Recommended Solder Reflow Profiles Refer to the "Recommended Solder Reflow Profile" Application Note. Tape and Reel Information Refer to the "Discrete Devices and IC Switch/Attenuators Tape and Reel Package Orientation" Application Note. Pin 10 0.193 (4.90 mm) 0.006 (0.15 mm) 0.118 (3.00 mm) 0.006 (0.15 mm) Pin 1 Indicator Pin 1 0.034 (0.86 mm) 0.004 (0.10 mm) 0.118 (3.00 mm) 0.006 (0.15 mm) 0.0197 (0.500 mm) BSC 8-16 0-6 0.009 (0.23 mm) Ref. 0.043 (1.09 mm) Max. 0.006 (0.15 mm) Max. 0.002 (0.05 mm) Min. 0.022 (0.55 mm) 0.006 (0.15 mm) Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 200273 Rev. B * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * July 31, 2006 5 DATA SHEET * SKY12322-86LF Copyright (c) 2002, 2003, 2004, 2005, 2006, Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. ("Skyworks") products or services. 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Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 6 July 31, 2006 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 200273 Rev. B