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LMH6521

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High Performance Dual DVGA

Data sheet
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High Performance Dual DVGA

LMH6521

ACTIVE
Data sheet Order now

Product details

Parameters

2nd harmonic (dBc) 84 3rd harmonic (dBc) 83 @ MHz 200 Acl, min spec gain (V/V) 0.53 Architecture VGA, Fully Differential ADC Driver BW @ Acl (MHz) 1400 Gain (Max) (dB) 26 Gain (Min) (dB) -5.5 Step size (dB) 0.5 Iq per channel (Typ) (mA) 113 Type RF VGA Number of channels (#) 2 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 (RTV) 32 25 mm² 5 x 5 open-in-new Find other RF VGAs

Features

  • OIP3 of 48.5 dBm at 200 MHz
  • Maximum Voltage Gain of 26 dB
  • Gain Range: 31.5 dB with 0.5-dB Step Size
  • Channel Gain Matching of ±0.04 dB
  • Noise Figure: 7.3 dB at Maximum Gain
  • –3-dB Bandwidth of 1200 MHz
  • Low Power Dissipation
  • Independent Channel Power Down
  • Three Gain Control Modes:
    • Parallel Interface
    • Serial Interface (SPI)
    • Pulse Mode Interface
  • Temperature Range: –40°C to +85°C
  • Thermally-Enhanced, 32-Pin WQFN Package
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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 0.5-dB gain steps over a 31.5-dB range. Serial and parallel programming options are provided. Serial mode programming uses the SPI interface. A pulse mode is also offered where simple up or down commands can change the gain one step at a time.

The output amplifier has a differential output allowing 10-VPPD signal swings on a single 5-V supply. The low impedance output provides maximum flexibility when driving filters or analog to digital converters.

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Technical documentation

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Type Title Date
* Data sheet LMH6521 High Performance Dual DVGA datasheet (Rev. E) Aug. 23, 2016
E-book The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Selection guide TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
User guide Using the LMH6521 in DC Coupled Applications Design Guide Jan. 08, 2015
Technical article Part 2 - Mitigating common mode noise Nov. 03, 2014
Technical article When to use an RF choke vs an inductor Apr. 23, 2014
User guide TSW1265 Dual-Wideband RF-to-Digital Receiver Design Guide Sep. 03, 2013
User guide TSW1266 Wideband RF-to-Digital Complex Receiver-Feedback Signal Chain Sep. 03, 2013
Technical article A closer look at special function amplifiers Aug. 15, 2013
Technical article How to determine power gain and voltage gain in RF systems Jul. 10, 2013
Application note AN-1719 Noise Figure Analysis Fully Differential Amplifier (Rev. A) May 01, 2013
User guide AN-2045 LMH6521EVAL Evaluation Board (Rev. A) May 01, 2013
Application note AN-2235 Ckt Brd Design for LMH6517/21/22 & Other H-Sp IF/RF F Amp (Rev. A) May 01, 2013
Application note Between the Amplifier and ADC: Managing Filter Loss in Communications Systems (Rev. B) Apr. 26, 2013
Application note Drivng HSpeed ADCs w/LMH6521 DVGA for High IF AC-Coupled Apps (Rev. A) Apr. 26, 2013
Application note Using High Speed Diff Amp to Drive ADCs (Rev. A) Apr. 26, 2013
More literature Featured High Speed Differential Amplifiers Oct. 23, 2012
Application note A Walk Along the Signal Path (High-Speed Signal Path) Mar. 30, 2005

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
399
Description

The LMH6521EVAL evaluation board is designed to aid in the characterization of TI`s High Speed LMH6521 High Performance Dual (DVGA). Use the evaluation board as a guide for high frequency layout and as a tool to aid in device testing and characterization.

Features

Contents:

  • Assembled LMH6521EVAL Board
View details
EVALUATION BOARD Download
document-generic User guide
499
Description

The TSW1265EVM is a wideband dual receiver reference design and evaluation platform. The signal chain allows conversion from RF to bits using a dual-channel downconverter mixer, the LMH6521 dual-channel DVGA, and the ADS4249 14-bit 250-MSPS ADC. The TSW1265EVM also includes the LMK04800 dual-PLL (...)

Features
  • Complete RF-to-bits receiver evaluation platform utilizing a dual-channel downconverter, LMH6521 DVGA, and ADS4249 14-bit 250-MSPS ADC
  • The LMK04800 clock generator and jitter-cleaning provides a complete onboard clocking solution
  • A software GUI is provided to configure the ADS4249, LMK04800, and (...)
    • View details
    EVALUATION BOARD Download
    document-generic User guide
    599
    Description

    The TSW16DX370EVM is a reference design board used to evaluate the high performance receiver IF super-heterodyne subsystem solution including the following products from Texas Instruments:

    • TRF37B32 dual down-converting mixer with integrated IF amplifier
    • LMH6521 dual digitally controlled variable gain (...)
    Features
    • High linearity, low noise Superheterodyne sub-system reference design
    • Wide RF input range and greater than 100MHz of IF bandwidth
    • Quickly evaluate ADC performance through High Speed Data Converter Pro software
    • Simple connection to TSW14J56EVM data capture card or direct connection to FMC based Xilinx (...)
    View details

    Design tools & simulation

    SIMULATION MODEL Download
    SNOJ009.ZIP (46 KB) - Spice Model
    SIMULATION MODEL Download
    SNOM321.TSC (286 KB) - TINA-TI Reference Design
    SIMULATION MODEL Download
    SNOM322.ZIP (8 KB) - TINA-TI Spice Model

    Reference designs

    REFERENCE DESIGNS Download
    700–2700 MHz Dual-Channel Receiver with 16-Bit ADC and 100 MHz IF Bandwidth Reference Design
    TIDA-00360 — The increasing demand on wireless networks to provide faster data links to customers has driven transceiver hardware to increasingly demanding performance with enough bandwidth to support the largest standardized multi-carrier frequency bands (with band aggregation in some cases) and enough receiver (...)
    document-generic Schematic document-generic User guide
    REFERENCE DESIGNS Download
    Equalization Optimization of a JESD204B Serial Link Reference Design
    TIDA-00353 — Employing equalization techniques is an effective way of compensating for channel loss in JESD204B high speed serial interfaces for data converters. This reference design features the ADC16DX370, a dual 16-bit, 370 MSPS analog-to-digital converter (ADC) that utilizes de-emphasis equalization to (...)
    document-generic Schematic document-generic User guide
    REFERENCE DESIGNS Download
    Wideband RF-to-Digital Complex Receiver-Feedback Signal Chain
    TIDA-00074 — This is a wideband complex-receiver reference design and evaluation platform that is ideally suited for use as a feedback receiver for transmitter digital predistortion. The EVM signal chain is ideal for high intermediate-frequency (IF) complex-feedback applications and contains a complex (...)
    document-generic Schematic document-generic User guide
    REFERENCE DESIGNS Download
    Dual-Wideband RF-to-Digital Receiver Design
    TIDA-00073 — The TSW1265EVM is an example design of a wideband RF to digital dual receiver solution capable of digitizing up to 125MHz of spectrum. The system provides a reference on how to use the ADS4249, LMH6521, LMK0480x, and a dual mixer to achieve this.  This reference EVEM coupled with a capture card (...)
    document-generic Schematic document-generic User guide

    CAD/CAE symbols

    Package Pins Download
    WQFN (RTV) 32 View options

    Ordering & quality

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    • Material content
    • Qualification summary
    • Ongoing reliability monitoring

    Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

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