DATA SHEET SKY12323-303LF: 0.5-3.0 GHz Five-Bit Digital Attenuator (1 dB LSB) Applications Transceiver transmit automatic level control or receive automatic gain control in GSM, CDMA, WCDMA, WLAN, Bluetooth , or Zigbee land mobile radio base stations or terminal equipment General-purpose signal attenuation in telecommunications and instrumentation applications Features Broadband operation: 0.5 to 3.0 GHz Attenuation range: 31 dB LSB attenuation: 1 dB Low insertion loss: 1.4 dB 900 MHz Positive voltage operation: 2.7 to 5.5 V Low current consumption: <100 A 3 V High IIP3: +45 dBm Figure 1. SKY12323-303LF Block Diagram Small, MSOP-10 (10-pin, 3 x 3 mm) package with exposed paddle (MSL1, 260 C per JEDEC J-STD-020) The SKY12323-303LF is comprised of five cascaded fixed attenuators, each of which has a shunt bypass switch. Beginning at the 1 dB LSB, 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, which bypasses that fixed attenuator stage a logic low opens the switch to force the Description input signal to that stage through the associated attenuator. The SKY12323-303LF is a monolithic, GaAs binary-weighted five- A functional block diagram is shown in Figure 1. The pin bit single positive control voltage digital attenuator. The device configuration and package are shown in Figure 2. Signal pin operates from 0.5 to 3.0 GHz. DC power consumption is very low, assignments and functional pin descriptions are provided in typically 100 A maximum, with a control and supply voltage of Table 1. 3 V. The SKY12323-303LF has an LSB of 1 dB and total attenuation of 31 dB. The two RF ports are bilateral each can be used as the RF input or the RF output. An external supply voltage of 2.7 to 5.5 V is required. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 200273D Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice June 3, 2011 1 DATA SHEET SKY12323-303LF FIVE-BIT DIGITAL ATTENUATOR Figure 2. SKY12323-303LF Pinout 10-Pin MSOP-10 (Top View) Table 1. SKY12323-303LF Signal Descriptions Pin Name Description Pin Name Description 1 V1 High impedance control voltage input for 6 J2 RF input or output port, supply voltage input 1 dB weighted bit (LSB) if not supplied to pin 10 2 V2 High impedance control voltage input for 7 GND Ground 2 dB weighted bit 3 V3 High impedance control voltage input for 8 GND Ground 4 dB weighted bit 4 V4 High impedance control voltage input for 9 GND Ground 8 dB weighted bit 5 V5 High impedance control voltage input for 10 J1 RF input or output port, supply voltage input 16 dB weighted bit (MSB) if not supplied to pin 6 The state of the SKY12323-303LF is determined by the logic Electrical and Mechanical Specifications provided in Table 4. The absolute maximum ratings of the SKY12323-303LF are provided in Table 2. Electrical specifications are provided in Table 3. Typical performance characteristics of the SKY12323-303LF are illustrated in Figures 3 through 6. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 June 3, 2011 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 200273D