LMH6522

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High Performance Quad DVGA

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Product details

Parameters

2nd harmonic (dBc) 78 3rd harmonic (dBc) 75 @ MHz 200 Acl, min spec gain (V/V) 0.61 Architecture VGA, Fully Differential ADC Driver BW @ Acl (MHz) 1400 Gain (Max) (dB) 25.74 Gain (Min) (dB) -4.3 Step size (dB) 0.2 Iq per channel (Typ) (mA) 116 Product type RF VGA Number of channels (#) 4 Operating temperature range (C) -40 to 85 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.25 Total supply voltage (Min) (+5V=5, +/-5V=10) 4.75 Vs (Min) (V) 4.75 Vs (Max) (V) 5.25 open-in-new Find other RF VGAs

Package | Pins | Size

WQFN (NJY) 54 55 mm² 10 x 5.5 open-in-new Find other RF VGAs

Features

  • 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

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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.

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Technical documentation

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Type Title Date
* Datasheet LMH6522 High Performance Quad DVGA datasheet (Rev. D) Mar. 18, 2013
White papers The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Selection guides TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
Application notes AN-1718 Differential Amplifier Applications Up to 400 MHz (Rev. B) May 01, 2013
Application notes AN-1719 Noise Figure Analysis Fully Differential Amplifier (Rev. A) May 01, 2013
User guides AN-2072 LMH6522 Evaluation Board (Rev. B) May 01, 2013
Application notes AN-2235 Ckt Brd Design for LMH6517/21/22 & Other H-Sp IF/RF F Amp (Rev. A) May 01, 2013
Application notes Between the Amplifier and ADC: Managing Filter Loss in Communications Systems (Rev. B) Apr. 26, 2013
Application notes Using High Speed Diff Amp to Drive ADCs (Rev. A) Apr. 26, 2013
More literature Featured High Speed Differential Amplifiers Oct. 23, 2012
Application notes A Walk Along the Signal Path (High-Speed Signal Path) Mar. 30, 2005

Design & development

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Hardware development

EVALUATION BOARDS Download
document-generic User guide
$499.00
Description
The LMH6522EVAL evaluation board is designed to facilitate the test and measurement of the LMH6522 quad, digitally controlled, variable gain amplifier (DVGA). This board is configured with 50 Ohm, single ended signal paths for use with standard lab equipment. The LMH6522EVAL board offers switch (...)
Features
  • 4 channels
  • Parallel and serial control options
  • 50 Ohm single ended signal paths
  • Only a single, 5V bench power supply required
  • Supports fully differential signal path operation with minor rework

CAD/CAE symbols

Package Pins Download
WQFN (NJY) 54 View options

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