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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) 145 Acl, min spec gain (V/V) 1 Slew rate (Typ) (V/us) 490 Vn at flatband (Typ) (nV/rtHz) 4.6 Iq per channel (Typ) (mA) 1.14 Rail-to-rail In to V-, Out Vos (offset voltage @ 25 C) (Max) (mV) 2 Operating temperature range (C) -40 to 85 Output current (Typ) (mA) 55 2nd harmonic (dBc) 133 3rd harmonic (dBc) 141 GBW (Typ) (MHz) 95 Input bias current (Max) (pA) 900000 @ MHz 0.001 CMRR (Typ) (dB) 102 open-in-new Find other Fully differential amplifiers

Package | Pins | Size

SOIC (D) 8 19 mm² 3.91 x 4.9 VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Fully differential amplifiers

Features

  • Fully Differential Architecture
  • Bandwidth: 145 MHz (AV = 1 V/V)
  • Slew Rate: 490 V/µs
  • HD2: –133 dBc at 10 kHz (1 VRMS,
    RL = 1 kΩ)
  • HD3: –141 dBc at 10 kHz (1 VRMS,
    RL = 1 kΩ)
  • Input Voltage Noise: 4.6 nV/√Hz
    (f = 100 kHz)
  • THD+N: –112dBc (0.00025%) at
    1 kHz (22-kHz BW, G = 1, 5 VPP)
  • Open-Loop Gain: 119 dB (DC)
  • NRI–Negative Rail Input
  • RRO–Rail-to-Rail Output
  • Output Common-Mode Control
    (with Low Offset)
  • Power Supply:
    • Voltage: +2.5 V (±1.25 V) to
      +5.5 V (±2.75 V)
    • Current: 1.14 mA/ch
  • Power-Down Capability: 20 µA (typical)
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Description

The THS4521, THS4522, and THS4524 family of devices are very low-power, fully differential amplifiers with rail-to-rail output and an input common-mode range that includes the negative rail. These amplifiers are designed for low-power data acquisition systems and high-density applications where power dissipation is a critical parameter, and provide exceptional performance in audio applications.

The family includes single FDA (THS4521), dual FDA (THS4522), and quad FDA (THS4524) versions.

These fully differential amplifiers feature accurate output common-mode control that allows for dc-coupling when driving analog-to-digital converters (ADCs). This control, coupled with an input common-mode range below the negative rail as well as rail-to-rail output, allows for easy interfacing between single-ended, ground-referenced signal sources. Additionally, these devices are ideally suited for driving both successive-approximation register (SAR) and delta-sigma (ΔΣ) ADCs using only a single +2.5V to +5V and ground power supply.

The THS4521, THS4522, and THS4524 family of fully differential amplifiers is characterized for operation over the full industrial temperature range from –40°C to +85°C.

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Same functionality and pinout but is not an equivalent to the compared device:
THS4551 ACTIVE Low Noise, Precision, 150MHz, Fully Differential Amplifier This device offers significantly lower noise, offset and drift and improved harmonic distortion

Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet THS452x Very Low Power, Negative Rail Input, Rail-To-Rail Output, Fully Differential Amplifier datasheet (Rev. H) Jun. 18, 2015
Application notes High-speed overcurrent detection circuit (Rev. A) Jan. 17, 2019
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
More literature Featured High Speed Differential Amplifiers Oct. 23, 2012
Application notes Converting single-ended video to differential video in single-supply systems Sep. 16, 2011
Application notes Using single-supply fully diff. amps with neg. input voltages to drive ADCs Nov. 15, 2010
Application notes DC Output Errors in a Fully-Differential Amplifier May 25, 2010
Application notes Using fully differential op amps as attenuators, Part 3 Oct. 04, 2009
User guides THS4521/45222/4524EVM User's Guide Jul. 16, 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
999
Description

This board supports: TAS2555YZEVMTAS2557EVM and TAS2559EVM.

The Smart Amplifier Speaker Characterization Board, when used in conjunction with a supported TI Smart Amplifier and PurePath Console software, provides users the ability to measure speaker excursion, temperature and other parameters for (...)

Features
  • Easily and quickly characterize speakers
  • Quick connection to TI Smart Amplifier EVMs
  • Microphone included for SPL measurements
  • Laser input for speaker excursion measurements
EVALUATION BOARDS Download
document-generic User guide
149
Description
The REF6025EVM-PDK is a platform for evaluating the performance of the REF6025 voltage reference. The evaluation kit brings out the burst mode performance of the device which is a key feature of the device.
Features
  • TI’s first ultra-high precision reference
  • Introduces ADC drive buffer which is an integrated high bandwidth, output impedance buffer that helps achieve the lowest distortion, ultra-low-noise data acquisition systems
  • Introduces burst mode data acquisition with first-sample correct to 18-bit (...)
EVALUATION BOARDS Download
document-generic User guide
99
Description

The THS4521EVM is an evaluation module for the single, THS4521 in the D (8-lead SOIC) package.

The THS4521EVM 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 (...)

Features
  • Configured for split supply operation and easily modified for single supply
  • Default single-ended input configuration can easily be reconfigured for differential input
  • Default single-ended output configuration can easily be reconfigured for differential output
  • Designed for easy connection to standard (...)

Design tools & simulation

SIMULATION MODELS Download
SBOM341D.TSC (66 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOM342D.ZIP (16 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBOM343D.ZIP (16 KB) - PSpice Model
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

Reference designs

REFERENCE DESIGNS Download
Data Acquisition Optimized for Lowest Distortion, Lowest Noise, 18 bit, 1Msps Reference Design
TIPD115 This TI Verified Design is a high performance data acquisition system (DAQ) using an 18-bit SAR ADC, ADS8881 at a throughput of 1MSPS. This design has been optimized to provide the lowest noise & distortion solution for a full scale input sinewave of 10 KHz. This leads to a maximum possible (...)
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
High Dynamic-Range Headphone Driver Reference Design for Voltage-Output, Differential Audio DACs
TIDA-00715 A low THD+N amplifier signal chain for driving headphones is presented. The design walks through various factors to consider in order to optimize performance based on customer needs.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Ultrasonic Water Flow Measurement Reference Design
TIDM-ULTRASONIC-WATER-FLOW-MEASUREMENT This Ultrasonic Water Flow Measurement system is ideal for providing highly accurate measurement across wide flow ranges as low as 1.4gpm. The design is based on a single MCU with discrete analog components. It uses a unique propriety algorithm that improves robustness and performance in flow (...)
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
SOIC (D) 8 View options
VSSOP (DGK) 8 View options

Ordering & quality

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