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

 2.1 to 3.1 GHz broadband operating range

 Maximum attenuation value: 34 dB

 Control voltage range: 0 to 5 V

 High IIP3: +61 dBm

 Low current consumption: <2 mA @ maximum attenuation

 Small, MCM (8-pin, 4.9 x 3.2 mm) package

(MSL3, 260 C per JEDEC J-STD-020)

Description

The SKY12233-11 is a voltage-controlled variable attenuator from

Skyworks series of high third order input intercept point (IIP3)

components. The device has been designed to operate over the

2.1 to 3.1 GHz frequency band, but is specifically optimized for

use as a wide dynamic range, low distortion attenuator, centered

at 2.60 GHz.

The SKY12233-11 provides monotonic attenuation performance

over its entire control voltage range. This attenuator is comprised

of a pair of matched PIN diodes that terminate two ports of its

internal 90-degree hybrid coupler. The diodes are biased using an

external control voltage signal. The attenuator requires no

external components. It operates with a control voltage range of 0

to 5 V and a 1.7 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.