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Product details

Parameters

Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.5 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.5 BW @ Acl (MHz) 36 Acl, min spec gain (V/V) 1 Slew rate (Typ) (V/us) 220 Vn at flatband (Typ) (nV/rtHz) 10 Iq per channel (Typ) (mA) 0.25 Rail-to-rail In to V-, Out Vos (offset voltage @ 25 C) (Max) (mV) 0.4 Operating temperature range (C) -40 to 125 Output current (Typ) (mA) 26 2nd harmonic (dBc) 129 3rd harmonic (dBc) 138 GBW (Typ) (MHz) 27 Input bias current (Max) (pA) 250000 @ MHz 0.001 CMRR (Typ) (dB) 116 open-in-new Find other Fully differential amplifiers

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 VSSOP (DGK) 8 15 mm² 3 x 4.9 WQFN (RUN) 10 4 mm² 2 x 2 open-in-new Find other Fully differential amplifiers

Features

  • 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)

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Description

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

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet THS4531A Ultra Low-Power, Rail-to-Rail Output, Fully Differential Amplifier datasheet (Rev. D) Mar. 04, 2020
Application notes Maximizing System Total Harmonic Distortion Using High Speed Amplifiers Jun. 20, 2018
White papers The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Technical articles How to minimize filter loss when you drive an ADC Oct. 20, 2016
Application notes Fully-Differential Amplifiers (Rev. E) Sep. 19, 2016
Technical articles Go differential to differentiate your precision design Aug. 11, 2016
Technical articles How to use a fully differential amplifier as a level shifter Jul. 13, 2016
Technical articles What you need to know about internal ESD protection on integrated circuits Dec. 02, 2015
User guides THS4531ADGKEVM Evaluation Module Dec. 05, 2012
Application notes Using fully differential op amps as attenuators, Part 3 Oct. 04, 2009
Application notes Using fully differential op amps as attenuators, Part 2 Jul. 14, 2009
Application notes Using fully differential op amps as attenuators, Part 1 May 01, 2009
Application notes Analysis of fully differential amplifiers Mar. 11, 2005
Application notes Designing for low distortion with high-speed op amps Mar. 02, 2005
Application notes Noise Analysis for High Speed Op Amps (Rev. A) Jan. 17, 2005

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
99
Description

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 (...)

Features
  • Configured for split-supply operation and easily modified for single supply
  • Default gain of 1 configuration can easily be reconfigured for other gains
  • Designed for easy connection to standard 50-Ω input/output impedance test equipment
  • Inputs and outputs include SMA connectors
  • Design tools & simulation

    SIMULATION MODELS Download
    SLOM261.ZIP (7 KB) - TINA-TI Spice Model
    SIMULATION MODELS Download
    SLOM262.TSC (3751 KB) - TINA-TI Reference Design
    SIMULATION MODELS Download
    SLOM263.ZIP (111 KB) - PSpice Model
    SIMULATION MODELS Download
    SLOM350A.ZIP (277 KB) - PSpice Model
    SIMULATION MODELS Download
    SLOM351A.ZIP (15 KB) - TINA-TI Spice Model
    SIMULATION MODELS Download
    SLOM352A.TSC (68 KB) - TINA-TI Reference Design
    SIMULATION TOOLS Download
    PSpice® for TI design and simulation tool
    PSPICE-FOR-TI — 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 (...)
    Features
    • Leverages Cadence PSpice Technology
    • Preinstalled library with a suite of digital models to enable worst-case timing analysis
    • Dynamic updates ensure you have access to most current device models
    • Optimized for simulation speed without loss of accuracy
    • Supports simultaneous analysis of multiple products
    • (...)
    SIMULATION TOOLS Download
    SPICE-based analog simulation program
    TINA-TI 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 (...)
    document-generic User guide
    BILL OF MATERIALS (BOM) Download
    SLOR110.ZIP (315 KB)

    Reference designs

    REFERENCE DESIGNS Download
    Interface to a HIPERFACE Position Encoder Reference Design
    TIDA-00202 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 channel (...)
    document-generic Schematic document-generic User guide
    REFERENCE DESIGNS Download
    Interface to Sin/Cos Encoders with High-Resolution Position Interpolation Reference Design
    TIDA-00176 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 (...)
    document-generic Schematic document-generic User guide
    REFERENCE DESIGNS Download
    Interface to a Sin/Cos Encoder with Sitara AM437x Reference Design
    TIDA-00178 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 (...)

    document-generic Schematic document-generic User guide
    REFERENCE DESIGNS Download
    Reference Design for Interfacing Current Output Hall Sensors and CTs with Differential ADC/MCU
    TIDA-00368 The TIDA-00368 reference design provides a reference solution for 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 (...)
    document-generic Schematic document-generic User guide
    REFERENCE DESIGNS Download
    Extending Rail-to-Rail Output Range for Fully Differential Amplifiers to Include True Zero Volts
    TIDA-00187 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 (...)
    document-generic Schematic document-generic User guide

    CAD/CAE symbols

    Package Pins Download
    QFN (RUN) 10 View options
    SOIC (D) 8 View options
    VSSOP (DGK) 8 View options

    Ordering & quality

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