LMH6521

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SNOSB47C – MAY 2011 – REVISED SEPTEMBER 2011

High Performance Dual DVGA

Check for Samples: LMH6521

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FEATURES

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Pulse mode interface

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Temperature Range –40°C to +85°C

234

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OIP3 of 48.5 dBm at 200 MHz

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Thermally enhanced, 32–Pin LLP package

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Maximum voltage gain of 26 dB

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Gain range of 31.5 dB with 0.5dB step size

APPLICATIONS

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Channel Gain Matching of ±0.04 dB

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Cellular base stations

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Noise figure of 7.3 dB at maximum gain

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Wideband and narrowband IF sampling

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-3 dB bandwidth of 1200 MHz

receivers

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Low power dissipation

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Wideband direct conversion

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Independent channel power down

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Digital pre-distortion

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Three gain control modes:

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ADC driver

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Parallel interface

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Serial interface ( SPI™)

DESCRIPTION

The LMH6521 contains two high performance, digitally controlled variable gain amplifiers (DVGA).

Both channels of the LMH6521 have an independent, digitally controlled attenuator followed by a high linearity,

differential output amplifier. Each block has been optimized for low distortion and maximum system design

flexibility. Each channel has a high speed power down mode.

The internal digitally controlled attenuator provides precise 0.5dB gain steps over a 31.5dB range. Serial and

parallel programming options are provided. Serial mode programming utilizes the SPI™ interface. A Pulse mode

is also offered where simple up or down commands can change the gain one step at a time.

impedance output provides maximum flexibility when driving filters or analog to digital converters.

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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SPI, SERIAL MODE — SPI are trademarks of Motorola, Inc..

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TRI-STATE is a registered trademark of National Semiconductor Corporation.

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All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.