data sheet SKY12329-350LF: GaAs Digital Attenuator 5-Bit, 1 dB LSB 400 MHz4 GHz Functional Block Diagram Applications RF l Transceiver transmit automatic level control or receive auto- Input/Output matic gain control in WiMAX, GSM, CDMA, WCDMA, WLAN, Bluetooth , Zigbee , Land Mobile Radio Base stations or Terminal Equipment 1 dB V 1 l General purpose signal attenuation in telecommunications and instrumentation applications 2 dB V 2 Features l Broadband: 400 MHz4 GHz 4 dB V 3 l Attenuation range: 31 dB l Least significant bit attenuation: 1 dB l 8 dB Low insertion loss: 1.2 dB 900 MHz V 4 l Single positive control voltage: 2.75.5 V l Low current consumption: <100 A 5 V 16 dB V 5 l Small QFN-16 3 x 3 mm package with exposed paddle l L ead (Pb)-free and RoHS-compliant MSL-1 260 C per JEDEC J-STD-020 RF Input/Output Description bypassing that fixed attenuator stage, and a logic low opens the The SKY12329-350LF is a monolithic GaAs, binary-weighted, switch to force the input signal to that stage through the associ- 5-bit, single positive control voltage digital attenuator which ated attenuator. operates from 400 MHz4 GHz. The attenuator has a least significant bit (LSB) of 1 dB and total attenuation of 31 dB. The DC power consumption is very low, 100 A maximum with con- two RF ports are bilateral each can be used as the RF input or trol voltage and supply voltage of 5 V. The switch can operate the RF output. This attenuator requires an external supply over the temperature range of -40 C to +85 C. voltage of 2.75.5 V. An evaluation board is available upon request. The SKY12329-350LF is comprised of 5 fixed attenuators in cascade, each of which having a shunt bypass switch. Beginning NeW Skyworks offers lead (Pb)-free, RoHS (Restriction of at the LSB, which is 1 dB, each succeeding fixed attenuator pro- Hazardous Substances)-compliant packaging. duces 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 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 200709 Rev. F Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. February 20, 2009 1Data Sheet SKY12329-350LF Electrical Specifications V = 0 V/5 V, T = 25 C, P = 0 dBm, Z = 50 W, unless otherwise noted CTL INPUT O Parameter Condition Frequency Min. typ. Max. Unit Insertion loss 0.41.0 GHz 1.2 1.6 dB 1.02.0 GHz 1.5 1.9 dB 2.03.0 GHz 1.8 2.2 dB 3.04.0 GHz 2.7 3.1 dB Attenuation range 31 dB Attenuation accuracy Attenuation referred to insertion loss. All attenuation states 0.41.0 GHz (0.35 + 3% of attenuation dB setting in dB) All attenuation states 1.03.0 GHz (0.3 + 3% of attenuation dB setting in dB) 115 dB attenuation states 3.04.0 GHz (0.5 + 5% of attenuation dB setting in dB) 1631 dB attenuation states 3.04.0 GHz (0.6 + 6% of attenuation dB setting in dB) Return loss 0.41.0 GHz 7 dB 1.04.0 GHz 10 dB Operating Characteristics V = 0 V/5 V, T = 25 C, P = 0 dBm, Z = 50 W, unless otherwise noted CTL INPUT O Parameter Condition Frequency Min. typ. Max. Unit Switching characteristics On/rise time 50/90% or 10/90% RF 150 ns Off/fall time 50/10% or 90/10% RF 500 ns Input power for 1 dB compression V = 0 V, V = 3 V 900 MHz 29 dBm LOW HIGH V = 0 V, V = 5 V 900 MHz 31 dBm LOW HIGH Input third order For two input tones. +5 dBm each tone intermodulation intercept V = 0 V, V = 3 V 14 GHz 39 dBm LOW HIGH V = 0 V, V = 5 V 14 GHz 41 dBm LOW HIGH Thermal resistance Junction to package terminal 45 C/W Supply voltage V - 0.2 V + 0.2 V HIGH HIGH Control voltage High 2.7 5.5 V Low -0.2 0.2 V Control port current V = V 15 100 A CTL HIGH V = V 5 20 A CTL LOW Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 February 20, 2009 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. 200709 Rev. F