Product details

Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 BW at Acl (MHz) 36 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 220 Architecture Bipolar, Fully Differential ADC Driver Vn at flatband (typ) (nV√Hz) 10 Iq per channel (typ) (mA) 0.25 Rail-to-rail In to V-, Out Vos (offset voltage at 25°C) (max) (mV) 0.4 Operating temperature range (°C) -40 to 125 Iout (typ) (mA) 26 2nd harmonic (dBc) 129 3rd harmonic (dBc) 138 Frequency of harmonic distortion measurement (MHz) 0.001 GBW (typ) (MHz) 27 Input bias current (max) (pA) 250000 Features Shutdown CMRR (typ) (dB) 116 Rating Catalog
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 BW at Acl (MHz) 36 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 220 Architecture Bipolar, Fully Differential ADC Driver Vn at flatband (typ) (nV√Hz) 10 Iq per channel (typ) (mA) 0.25 Rail-to-rail In to V-, Out Vos (offset voltage at 25°C) (max) (mV) 0.4 Operating temperature range (°C) -40 to 125 Iout (typ) (mA) 26 2nd harmonic (dBc) 129 3rd harmonic (dBc) 138 Frequency of harmonic distortion measurement (MHz) 0.001 GBW (typ) (MHz) 27 Input bias current (max) (pA) 250000 Features Shutdown CMRR (typ) (dB) 116 Rating Catalog
SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9 WQFN (RUN) 10 4 mm² 2 x 2
  • Ultra Low-Power:
    • Voltage: 2.5 V to 5.5 V
    • Current: 250 µA
    • Power-Down Mode: 0.5 µA (Typical)
  • Fully Differential Architecture
  • Bandwidth: 36 MHz (Av = 1 V/V)
  • Slew Rate: 200 V/µs
  • THD: –120 dBc at 1 kHz (1 VRMS, RL= 2 kΩ)
  • Input Voltage Noise: 10 nV/√Hz (f = 1 kHz)
  • High DC Accuracy:
    • VOS: ±100 µV
    • VOS Drift: ±3 µV/˚C (–40°C to +125°C)
    • AOL: 114 dB
  • Rail-to-Rail Output (RRO)
  • Negative Rail Input (NRI)
  • Output Common-Mode Control
  • 8-Pin SOIC (D) and VSSOP (DGK)
  • 10-Pin WQFN (RUN)
  • Ultra Low-Power:
    • Voltage: 2.5 V to 5.5 V
    • Current: 250 µA
    • Power-Down Mode: 0.5 µA (Typical)
  • Fully Differential Architecture
  • Bandwidth: 36 MHz (Av = 1 V/V)
  • Slew Rate: 200 V/µs
  • THD: –120 dBc at 1 kHz (1 VRMS, RL= 2 kΩ)
  • Input Voltage Noise: 10 nV/√Hz (f = 1 kHz)
  • High DC Accuracy:
    • VOS: ±100 µV
    • VOS Drift: ±3 µV/˚C (–40°C to +125°C)
    • AOL: 114 dB
  • Rail-to-Rail Output (RRO)
  • Negative Rail Input (NRI)
  • Output Common-Mode Control
  • 8-Pin SOIC (D) and VSSOP (DGK)
  • 10-Pin WQFN (RUN)

The THS4531A device is a low-power, fully differential amplifier with input common-mode range below the negative rail and rail-to-rail output. The device is designed for low-power data acquisition systems and high-density applications where power consumption and dissipation is critical.

The device features accurate output common-mode control that allows for DC coupling when driving analog-to-digital converters (ADCs). This control, coupled with the input common-mode range below the negative rail and rail-to-rail output, allows for easy interface from single-ended ground-referenced signal sources to successive-approximation registers (SARs), and delta-sigma (ΔΣ) ADCs using only single-supply 2.5-V to 5-V power. The THS4531A is also a valuable tool for general-purpose, low-power differential signal conditioning applications.

The THS4531A device is a low-power, fully differential amplifier with input common-mode range below the negative rail and rail-to-rail output. The device is designed for low-power data acquisition systems and high-density applications where power consumption and dissipation is critical.

The device features accurate output common-mode control that allows for DC coupling when driving analog-to-digital converters (ADCs). This control, coupled with the input common-mode range below the negative rail and rail-to-rail output, allows for easy interface from single-ended ground-referenced signal sources to successive-approximation registers (SARs), and delta-sigma (ΔΣ) ADCs using only single-supply 2.5-V to 5-V power. The THS4531A is also a valuable tool for general-purpose, low-power differential signal conditioning applications.

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Technical documentation

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Type Title Date
* Data sheet THS4531A Ultra Low-Power, Rail-to-Rail Output, Fully Differential Amplifier datasheet (Rev. D) PDF | HTML 04 Mar 2020
Application note Maximizing System Total Harmonic Distortion Using High Speed Amplifiers 20 Jun 2018
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Application note Fully-Differential Amplifiers (Rev. E) 19 Sep 2016
EVM User's guide THS4531ADGKEVM Evaluation Module 05 Dec 2012
Analog Design Journal Using fully differential op amps as attenuators, Part 3 04 Oct 2009
Analog Design Journal Using fully differential op amps as attenuators, Part 2 14 Jul 2009
Analog Design Journal Using fully differential op amps as attenuators, Part 1 01 May 2009
Analog Design Journal Analysis of fully differential amplifiers 11 Mar 2005
Analog Design Journal Designing for low distortion with high-speed op amps 02 Mar 2005
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005

Design & development

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

Evaluation board

THS4531ADGKEVM — THS4531ADGKEVM Evaluation Module

The THS4531ADGKEVM is designed to quickly and easily demonstrate the functionality and versatility of the amplifier. The EVM is ready to connect to power, signal source, and test instruments through the use of on-board connectors. The default amplifier configuration is single-ended input, (...)

User guide: PDF
Not available on TI.com
Simulation model

THS4531 TINA-TI Reference Design

SLOM262.TSC (3751 KB) - TINA-TI Reference Design
Simulation model

THS4531A PSpice Model (Rev. A)

SLOM350A.ZIP (277 KB) - PSpice Model
Simulation model

THS4531A TINA-TI Reference Design (Rev. A)

SLOM352A.TSC (68 KB) - TINA-TI Reference Design
Simulation model

THS4531A TINA-TI Spice Model (Rev. A)

SLOM351A.ZIP (15 KB) - TINA-TI Spice Model
Bill of materials (BOM)

THS4531ADGK EVM Design Files

SLOR110.ZIP (315 KB)
Calculation tool

SBOR022 TI FDA Calculator

Supported products & hardware

Supported products & hardware

Products
Fully differential amplifiers
LMH6550 400MHz, Differential, High Speed Op Amps LMH6551 370MHz, Differential, High Speed Op Amp LMH6552 1.5 GHz Fully Differential Amplifier LMH6553 900 MHz Fully Differential Amplifier with Output Limiting Clamp LMH6554 2.8 GHz Ultra Linear Fully Differential Amplifier LMP8350 Ultra Low Distortion Fully Differential Precision ADC Driver with Selectable Power Modes OPA862 12.6V, Low-noise, single-ended-to-differential, high input impedance amplifier THS4120 3.3 V, 100 MHz, 43 V/us, Fully Differential CMOS Amplifier w/Shutdown THS4121 3.3 V, 100 MHz, 43 V/us, Fully Differential CMOS Amplifier THS4130 150MHz, Fully Differential Input/Output Low Noise Amplifier With Shutdown THS4131 Fully Differential Input/Output Low Noise Amplifier THS4140 160MHz, Fully Differential Input/Output High Slew Rate Amplifier With Shutdown THS4141 160MHz, Fully Differential Input/Output High Slew Rate Amplifier THS4150 150MHz, Fully Differential Input/Output High Slew Rate Amplifier With Shutdown THS4151 150MHz, Fully Differential Input/Output High Slew Rate Amplifier THS4500 15V, High-Speed Fully Differential Amplifier with power-down THS4501 High-Speed Fully Differential Amplifier, +/-5 V THS4503 High-Speed Fully-Differential Amplifiers THS4504 Wideband, Low Distortion Fully Differential Amplifier with Shutdown THS4505 Wideband, Low-Distortion Fully Differential Amplifier THS4508 Wideband Fully Differential Amplifier THS4509 1.9-GHz, Wideband, Low-Noise, Low-Distortion, Fully-Differential Amplifier THS4511 1.6-GHz, unity-gain stable, wideband, low-noise, low distortion fully differential amplifier THS4513 1.6-GHz, min gain 1-V/V, low-noise, low distortion fully differential amplifier THS4520 Rail-to-Rail Output Wideband Fully Differential Amplifier THS4521 Very low power rail-to-rail output fully differential amplifier THS4522 Very low power dual channel rail-to-rail output fully differential amplifier THS4524 Very low power quad channel rail-to-rail output fully differential amplifier THS4531 Ultra low power 0.25mA, RRO, fully differential amplifier THS4531A Ultra Low Power, RRO, Fully-Differential Amplifier THS4532 Dual, Ultra low power 0.25mA, RRO, fully differential amplifier THS4541 High-Speed Differential I/O Amplifier THS4551 Low Noise, Precision, 150MHz, Fully Differential Amplifier THS4552 Dual Channel, Low-Noise, Precision, 150-MHz, Fully Differential Amplifier THS4561 Low-power, 60-MHz, wide-supply-range fully differential amplifier THS4567 220-MHz CMOS input fully differential amplifier with VICM and VOCM control THS770006 High-Speed Fully Differential ADC Driver Amplifier with +6dB Fixed Gain
Audio op amps
OPA1637 High-fidelity, high-voltage (36-V), low-noise (3.7-nV/rtHz) Burr-Brown™ audio fully-differential amp
Precision op amps (Vos<1mV)
THP210 High precision (40-μV, 0.1μV/C), high-voltage (36-V), low-noise (3.7-nV/√Hz), fully-differential amp
RF FDAs
LMH3401 7-GHz, Ultra-Wideband, Fully Differential Amplifier LMH5401 8-GHz Ultra wideband fully differential amplifier
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
Reference designs

TIDA-00176 — Interface to Sin/Cos Encoders with High-Resolution Position Interpolation Reference Design

The TIDA-00176 reference design is an EMC compliant industrial interface to Sin/Cos position encoders. Applications include industrial drives, which require accurate speed and position control.
The design utilizes a 16-bit dual sample ADC with drop-in compatible 14- or 12-bit versions available, (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00178 — Interface to a Sin/Cos Encoder with Sitara AM437x Reference Design

The TIDA-00178 reference design is an EMC compliant industrial interface to Sin/Cos position encoders. Applications include industrial drives, which require accurate speed and position control.

The design utilizes a 16-bit dual sample ADC with drop-in compatible 14- or 12-bit versions available, (...)

Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00202 — Interface to a HIPERFACE Position Encoder Reference Design

The TIDA-00202 reference design implements an EMC compliant industrial hybrid analog and digital interface to a HIPERFACE position encoder. A 3.3V supply RS485 transceiver with IEC-ESD and IEC-EFT protection is used for the bidirectional parameter channel. For the analog sin/cos signal (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00368 — Reference Design for Interfacing Current Output Hall Sensors and CTs with Differential ADC/MCU

This reference design provides interfacing current output Hall sensors and current transformers to differential ADC (standalone and integrated into MCU). The differential signal conditioning circuit is designed to measure motor current with an accuracy of ±0.5% across operating (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00187 — Extending Rail-to-Rail Output Range for Fully Differential Amplifiers to Include True Zero Volts

Operational amplifiers (op amps) have been used for decades in signal conditioning circuits and measurement systems. An op amp that has an output spanning from negative to positive supply rail are generally referred to as rail-to-rail output (RRO) op amps. These devices have been used increasingly (...)
Design guide: PDF
Schematic: PDF
Package Pins Download
SOIC (D) 8 View options
VSSOP (DGK) 8 View options
WQFN (RUN) 10 View options

Ordering & quality

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