Fully differential amplifiers

Differential ADC drivers to increase dynamic range and improve distortion for your signal chain needs

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Drive your precision and high-speed analog-to-digital converters (ADCs) with our industry-leading fully differential amplifiers (FDAs). We offer the highest performance with the lowest noise, distortion and power to drive your design.  Additionally, our FDAs are well suited for driving the output of precision and high-speed digital-to-analog converters (DACs). Our FDAs support both single-ended to differential and differential to single-ended functionality.

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Featured fully differential amplifiers

LMH5485-SEP NEW

Radiation tolerant, space-enhanced plastic, 850-MHz fully differential amplifier

Technical resources

Video series
Video series
Introduction to fully differential amplifiers
Learn the basics of FDA operation and the advantages of differential signaling.
Circuit design
Circuit design
Single-ended input to differential output circuit using a fully-differential amp
Learn about the challenges faced when attenuating large signals for digitization and the solutions for converting a large single-ended input signal to a differential signal sampled by an ADC.
document-pdfAcrobat PDF
Application note
Application note
Maximizing System Total Harmonic Distortion Using High Speed Amplifiers
Understand the relationship between an amplifier’s bandwidth and an analog-to-digital converter’s linearity. Explore tradeoffs when selecting the best low-distortion fully differential amplifier to drive a differential-input ADC.
document-pdfAcrobat PDF

Design & development resources

Reference design
High-Q Active Differential Bandpass Filter Reference Design for Instrumentation Qualification
The TIDA-01036 reference design demonstrates a high quality factor (Q factor) active differential bandpass filter. Such filters improve signal source SNR and may be used for data acquisition (DAQ) module testing. This filter may also be used to design a signal conditioning circuit in a DAQ (...)
Reference design
High performance single-ended to differential-active interface for high-speed ADCs reference design

This reference design uses the ADC34J22 12b 50Msps JESD204B data converter and the THS4541 fully differential amplifer to demonstrate how to design a high performance active interface for high speed ADCs.  This type of circuit can be used in sensor front end, motor control, and test and (...)

Reference design
16-Bit 1-GSPS Digitizer Reference Design with AC and DC Coupled Fixed Gain Amplifier
This reference design discusses the use and performance of the Ultra-Wideband, Fixed-gain high-speed amplifier, the LMH3401 to drive the high-speed analog-to-digital converter (ADC), the ADS54J60 device. Different options for common-mode voltages, power supplies, and interfaces are discussed and (...)