LMH6882

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2.4 GHz Dual Programmable Differential Amplifier with Gain Control

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Product details

Parameters

2nd harmonic (dBc) 70 3rd harmonic (dBc) 76 @ MHz 200 Acl, min spec gain (V/V) 2 Architecture VGA, Fully Differential ADC Driver BW @ Acl (MHz) 2400 Gain (Max) (dB) 26 Gain (Min) (dB) 6 Step size (dB) 0.25 Iq per channel (Typ) (mA) 50 Product type RF VGA Number of channels (#) 2 Operating temperature range (C) -40 to 85 Slew rate (Typ) (V/us) 6000 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

Features

  • Small Signal Bandwidth: 2400 MHz
  • OIP3 @ 100 MHz: 42 dBm
  • HD3 @ 100 MHz: –100 dBc
  • Noise Figure: 9.7 dB
  • Voltage Gain: 26 dB to 6 dB
  • Voltage Gain Step Size: 0.25 dB
  • Input Impedance: 100 Ω
  • Parallel and Serial Gain Control
  • Power Down Capability
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Description

The LMH6882 is a high-speed, high-performance programmable differential amplifier. With a bandwidth of 2.4 GHz and high linearity of 42 dBm OIP3, the LMH6882 is suitable for a wide variety of signal conditioning applications.

The LMH6882 programmable differential amplifier combines the best of both fully differential amplifiers and variable-gain amplifiers. The device offers superior noise and distortion performance over the entire gain range without external resistors, enabling the use of just one device and one design for multiple applications requiring different gain settings.

The LMH6882 is an easy-to-use amplifier that can replace both fully differential, fixed-gain amplifiers as well as variable-gain amplifiers. The LMH6882 requires no external gain-setting components and supports gain settings from 6 dB to 26 dB with small, accurate 0.25-dB gain steps. As shown in the adjacent voltage gain chart the gain steps are very accurate over the entire gain range. With an input impedance of 100 Ω, the LMH6882 is easy to drive from a variety of sources such as mixers or filters. The LMH6882 also supports 50-Ω single-ended signal sources and supports DC- and AC-coupled applications.

Parallel gain control allows the LMH6882 to be soldered down in a fixed-gain so that no control circuit is required. If dynamic gain control is desired, the LMH6882 can be changed with SPI™ serial commands or with the parallel pins.

The LMH6882 is fabricated in TI’s CBiCMOS8 proprietary complementary silicon germanium process and is available in a space-saving, thermally enhanced 36-pin WQFN package. The same amplifier is offered in a single package as the LMH6881.

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Technical documentation

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Type Title Date
* Datasheet LMH6882 DC to 2.4-GHz, High-Linearity, Dual, Programmable Differential Amplifier datasheet (Rev. D) Dec. 06, 2015
White papers The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
More literature Featured High Speed Differential Amplifiers Oct. 23, 2012
User guides AN-2268 LMH6882 Evaluation Board Aug. 09, 2012

Design & development

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Hardware development

EVALUATION BOARDS Download
document-generic User guide
249
Description
The LMH6882EVAL is an easy to use, fully assembled, evaluation kit for the LMH6882 Programmable Gain Amplifier. The LMH6882EVAL has been designed to provide high performance measurements using single ended test equipment. The LMH6882EVAL has also been designed to be modified by the user for other (...)

Design tools & simulation

SIMULATION MODELS Download
SNOM334.TSC (3443 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNOM335.ZIP (11 KB) - TINA-TI Spice Model

Reference designs

REFERENCE DESIGNS Download
Quad-Channel 250-Msps Digitizer with Variable Gain Amplifier Reference Design
TIDA-00094 This reference design shows a quad channel, 14-bit, 250-Msps digitizer with wide input range using the LMH6881 programmable differential amplifier and ADS4449 quad-channel, 14-bit, 250-Msps ADC. This combination allows an input voltage range of approximately 1 Vpp to 100 uVpp (4 dBm to -75 dBm (...)
document-generic Schematic document-generic User guide

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