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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Technical resources

Video series

Introduction to fully differential amplifiers

Learn the basics of FDA operation and the advantages of differential signaling.

Circuit design

Single-ended input to differential output circuit using a fully-differential amp (Rev. A)

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.

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Application brief

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.

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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

Dallas Logic Corp high performance active interface for high-speed ADCs reference design

This reference design, provided by Dallas Logic Corp, uses the ADC34J22 12b 50MSPS JESD204B data converter and the THS4541 fully differential amplifier to show 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, (...)

From: Dallas Logic Corporation

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 (...)