SKY77762-81

SkyHi™ Power Amplifier Module for CDMA/ WCDMA/ HSDPA/ HSUPA/ HSPA+/ LTE – Band II (1850-1910 MHz)

The SKY77762-81 SkyHi™ fully matched power amplifier module (PAM) is developed for wideband code division multiple access (WCDMA) applications.

This small and efficient module packs full 1850 to 1920 MHz bandwidth coverage into a single compact package.

High efficiencies attained throughout the entire power range enable talk-time advantages. The SKY77762-81 meets the stringent spectral linearity requirements of HSDPA, HSUPA, and LTE data transmission with high power-added efficiency.

An integrated directional coupler reduces system part count.

The gallium arsenide (GaAs) microwave monolithic integrated circuit (MMIC) contains all amplifier active circuitry, including input and interstage matching circuits. Output matching into a 50 Ω load optimizes efficiency and power performance.

The silicon CMOS support die, providing precision biasing for the MMIC, enables a true CMOScompatible control interface.

While primary bias to the SKY77762-81 can be supplied directly from any suitable battery with an output of 3.2 V to 4.2 V, optimal performance is obtained with VCC2 sourced from a dc-dc power supply adjusted within 0.5 V to 3.6 V based on target output power levels.

Power down executes by setting VENABLE to zero volts. No external supply-side switch is needed since typical “off” leakage is a few micro amperes with full primary voltage supplied from the battery.

Product Summary

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Specifications

Product LifecycleIn Production

Frequency (MHz)1850-1910

DescriptionPAM for CDMA/ WCDMA/ HSDPA/ HSUPA/ HSPA+/ LTE – Band II (1850-1910 MHz)

Typical PAE (%)46

Typical Linear LTE Power
(dBm)—

Typical Imax (mA)

Typical Gain (dB)28.6

Supply Voltage (V)3.0-4.5

PackageMCM, 10-pad

Package (mm)3 x 3 x 0.9

Features

Low voltage positive bias supply 3.0 V to 4.5 V
Good linearity
High efficiency: 46% at 28.6 dBm
Large dynamic range
Small, low profile package: 3 mm x 3 mm x 0.9 mm, 10-pad configuration
Power down control
InGaP
Supports low collector voltage operation
Digital Enable
No VREF required
CMOS compatible control signals
Integrated Directional Coupler

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