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1FEATURES

23? OIP3: 49dBm @ 200MHz

? Noise Figure: 8.5dB

? Voltage Gain: 26dB

? 1dB Gain Steps

? ?3dB Bandwidth of 1400 MHz

? Gain Step Accuracy: 0.2 dB

? Disable Function for Each Channel

? Parallel and Serial Gain Control

? Low Power Mode for Power Management

Flexibility

? Small Footprint WQFN Package

APPLICATIONS

? Cellular Base Stations

? Wideband and Narrowband IF Sampling

Receivers

? Wideband Direct Conversion

? ADC Driver

DESCRIPTION

The LMH6522 contains four, high performance,

digitally controlled variable gain amplifiers (DVGA). It

has been designed for use in narrowband and

broadband IF sampling applications. Typically, the

LMH6522 drives a high performance ADC in a broad

range of mixed signal and digital communication

applications such as mobile radio and cellular base

stations where automatic gain control (AGC) is

required to increase system dynamic range.

Each channel of LMH6522 has an independent,

digitally controlled attenuator and a high linearity,

differential output, amplifier. All circuitry has been

optimized for low distortion and maximum system

design flexibility. Power consumption is managed by

a three-state enable pin. Individual channels can be disabled or placed into a Low Power Mode or a

higher performance, High Power Mode.

The LMH6522 digitally controlled attenuator provides

precise 1dB gain steps over a 31dB range. The digital

attenuator can be controlled by either a SPI? Serial

bus or a high speed parallel bus.

The output amplifier has a differential output, allowing

large signal swings on a single 5V supply. The low

impedance output provides maximum flexibility when

driving a wide range filter designs or analog to digital converters. For applications which have very large

changes in signal level LMH6522 can support up to

62dB of gain range by cascading channels.

The LMH6522 operates over the industrial

temperature range of ?40°C to +85°C. The LMH6522

is available in a 54-Pin, thermally enhanced, WQFN package.