LMH6881

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2.4GHz 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 Type RF VGA Number of channels (#) 1 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

Package | Pins | Size

WQFN (RTW) 24 16 mm² 4 x 4 open-in-new Find other RF VGAs

Features

  • Small Signal Bandwidth: 2400 MHz
  • OIP3 at 100 MHz: 44 dBm
  • HD3 at 100 MHz: –100 dBc
  • Noise Figure: 9.7 dB
  • Voltage Gain Range: 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 LMH6881 is a high-speed, high-performance, programmable differential amplifier. With a bandwidth of 2.4 GHz and high linearity of 44 dBm OIP3, the LMH6881 is suitable for a wide variety of signal conditioning applications.

The LMH6881 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 LMH6881 is an easy-to-use amplifier that can replace both fully differential, fixed-gain amplifiers as well as variable-gain amplifiers. The LMH6881 requires no external gain-setting components and supports gain settings from 6 dB to 26 dB with small, accurate 0.25-dB gain steps. With an input impedance of 100 Ω, the LMH6881 is easy to drive from a variety of sources such as mixers or filters. The LMH6881 also supports 50-Ω single-ended signal sources and supports both DC- and AC-coupled applications.

Parallel gain control allows the LMH6881 to be soldered down in a fixed-gain so that no control circuit is required. If dynamic-gain control is desired, the LMH6881 can be changed with SPI™ serial commands or with the parallel pins.

The LMH6881 is fabricated in TI’s CBiCMOS8 proprietary complementary silicon germanium process and is available in a space-saving, thermally enhanced 24-pin lead quad WQFN package. The same amplifier is offered in a dual package as the LMH6882.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet LMH6881 DC to 2.4-GHz, High-Linearity, Programmable Differential Amplifier datasheet (Rev. F) Feb. 06, 2015
E-book The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Technical articles Part 1 - Avoid common missteps with the common mode Aug. 13, 2014
User guide AN-2267 LMH6881 Evaluation Board (Rev. C) May 01, 2013
More literature Featured High Speed Differential Amplifiers Oct. 23, 2012
Application note LMH6881 - Making Differential Amplifier Design Easy (Rev. A) Oct. 18, 2012

Design & development

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

Hardware development

EVALUATION BOARD Download
199
Description
The LMH6881EVAL is an easy to use, fully assembled, evaluation kit for the LMH6881 Programmable Gain Amplifier. The LMH6881EVAL has been designed to provide high performance measurements using single ended test equipment. The LMH6881EVAL has also been designed to be modified by the user for other (...)

Design tools & simulation

SIMULATION MODEL Download
SNOM334.TSC (3443 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SNOM335.ZIP (11 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SNOM341.ZIP (65 KB) - 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
REFERENCE DESIGNS Download
Optimizing THS4509 to Drive High Speed ADCs Reference Design
TIDA-00093 This reference design shows the ability of the high-speed amplifier, THS4509 to perform single-ended to differential conversion to drive high-speed analog-to-digital converters (ADCs) while maintaining excellent noise and distortion performance. Performance versus input frequency is shown for both (...)
document-generic Schematic
REFERENCE DESIGNS Download
Optimizing LMH6554 to Drive High Speed ADCs
TIDA-00092 This reference design shows the ability of the high-speed amplifier, LMH6554, to perform single-ended to differential conversion to drive high-speed analog-to-digital converters (ADCs) while maintaining excellent noise and distortion performance. Performance versus input frequency is shown for both (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
WQFN (RTW) 24 View options

Ordering & quality

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