Applications

 Automatic power leveling/gain control circuits in cellular base

stations and point-to-point radio IF chains

 General wireless systems including WiMAX, LTE, WCDMA,

VSAT, and military communications

Features

 10 MHz to 1.5 GHz broadband operating range

 Low insertion loss: 2.5 dB @ 700 MHz

 Maximum attenuation level: 40 dB @ 700 MHz

 Control voltage range: 1 to 5 V

 High IIP3: +50 dBm

 Low current consumption: < 2 mA @ maximum attenuation

 Small MCM (8-pin, 3.8 x 3.8 x 1 mm) package

(MSL3, 260 C per JEDEC J-STD-020)

Description

The SKY12239-11 is a voltage-controlled variable attenuator from

Skyworks series of broadband, flat attenuation, high third order

input intercept point (IIP3) components. The device has been

designed to operate over the 10 MHz to 1.5 GHz frequency band,

and is specifically optimized for use as a wide dynamic range, low

distortion attenuator.

The SKY12239-11 provides monotonic attenuation performance

over its entire control voltage range. This attenuator is comprised

of four matched PIN diodes that are biased using an external

control voltage signal. The attenuator requires no external

components. It operates with a control voltage range of 1 to 5 V

and a 2 mA typical control current at maximum attenuation.

A functional block diagram is shown in Figure 1. The pin

configuration and package are shown in Figure 2. Signal pin

assignments and functional pin descriptions are provided in

Table 1.