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THS4531

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Ultra low power 0.25mA, RRO, fully differential amplifier

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Ultra low power 0.25mA, RRO, fully differential amplifier

THS4531

ACTIVE
Data sheet Order now

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 Out Vos (offset voltage @ 25 C) (Max) (mV) 1 Operating temperature range (C) -40 to 125 Output current (Typ) (mA) 26 2nd harmonic (dBc) 128 3rd harmonic (dBc) 137 GBW (Typ) (MHz) 30 Input bias current (Max) (pA) 210000 @ MHz 0.001 Gain (Max) (dB) -15 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
  • 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 Drift: ±4 µV/˚C (–40°C to +125°C)
    • AOL: 114 dB
  • Rail-to-Rail Output (RRO)
  • Negative Rail Input (NRI)
  • Output Common-Mode Control

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Description

The THS4531 is a low-power, fully-differential op amp 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 THS4531 is also a valuable tool for general-purpose, low-power differential signal conditioning applications.

The THS4531 is characterized for operation over the extended industrial temperature range from –40°C to +125°C. The following package options are available:

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Technical documentation

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Type Title Date
* Datasheet Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier datasheet (Rev. C) Mar. 04, 2020
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 THS4531DGK EVM Design Files Jan. 25, 2012
User guides THS4531DGKEVM Evaluation Module Jan. 11, 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
$149.00
Description

The THS4531DGKEVM 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
    • View details
    DEVELOPMENT KITS Download
    document-generic User guide
    Description

    To get started developing:
    Step 1: Buy the C2000 MCU F28379D LaunchPad
    Step 2: Read the quick start guide

    LAUNCHXL-F28379D is a low cost evaluation and development tool for the F2837xD,  F2837xS, and F2807x series in the TI MCU LaunchPad ecosystem which is compatible with various plug-on BoosterPacks (...)

    Features

    Hardware features

    • USB connected isolated XDS100v2 JTAG debug probe for real-time debug and flash programming
    • 4x 20-pin headers/connectors
    • Programmable buttons and LEDs
    • TMS320F28379D: 200 MHz dual C28xCPUs and dual CLAs, 1 MB Flash, 16-bit/12-bit ADCs, comparators, 12-bit DACs, delta-sigma sinc filters (...)
    View details

    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 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

    Reference designs

    REFERENCE DESIGNS Download
    Differential Signal Conditioning Circuit for Current and Voltage Measurement Using Fluxgate Sensors
    TIDA-00201 — This design provides a 4-channel signal conditioning solution for differential ADCs integrated into a microcontroller measuring motor current using fluxgate sensors. Also provided is an alternative measurement circuit with external differential SAR ADCs as well as circuits for high-speed overcurrent (...)
    document-generic Schematic document-generic User guide
    REFERENCE DESIGNS Download
    Wireless IoT, Bluetooth® Low Energy, 4½ Digit, 100kHz True RMS Digital Multimeter
    TIDA-01012 — Many products are now becoming connected through the Internet of Things (IoT), including test equipment such as digital multimeters (DMM).  Enabled by Texas Instruments’ SimpleLink™ ultra-low power wireless microcontroller (MCU) platform, the TIDA-01012 reference design demonstrates (...)
    document-generic Schematic document-generic User guide
    REFERENCE DESIGNS Download
    Enhanced Accuracy Battery Fuel Gauge Reference Design for Low Power Industrial IoT Field Metering
    TIDA-01014 — The Internet of Things (IoT) revolution is efficiently connecting applications and instruments, enabling battery powered, wide scale very low power sensor deployment.  New technologies, such as TI’s advanced sensor and low power connectivity devices, are enabling these instruments to be (...)
    document-generic Schematic document-generic User guide
    REFERENCE DESIGNS Download
    Transient and Digital Fault Recorder AFE Using Differential Amplifiers and HS ADC Reference Design
    TIDA-00499 — While Digital Fault Recorders (DFR) can detect transients in 17/20 μs at 60/50 Hz, Transient Recorders capture disturbances that can peak and decay well within a microsecond. This TI Design demonstrates the capturing of transient inputs at up to 1 MHz for Digital Fault Recorder and 25 MHz for (...)
    document-generic Schematic document-generic User guide
    REFERENCE DESIGNS Download
    Dual Channel Data Acquisition System for Optical Encoders, 12 Bit, 1MSPS
    TIPD117 — This TI Precision Verified Design provides the theory, component selection, simulation, PCB design, and measurement details for a 12-bit 1-MSPS single supply dual channel simultaneous data acquisition system. This circuit achieves 73 dB SINAD for a 4.5 V differential signal at 2 KHz input frequency (...)
    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

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