Product details

Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.85 Total supply voltage (Max) (+5V=5, +/-5V=10) 12.6 BW @ Acl (MHz) 60 Acl, min spec gain (V/V) 1 Slew rate (Typ) (V/us) 230 Architecture Fully Differential ADC Driver, Bipolar Vn at flatband (Typ) (nV/rtHz) 4 Iq per channel (Typ) (mA) 0.78 Rail-to-rail In to V-, Out Vos (offset voltage @ 25 C) (Max) (mV) 0.25 Operating temperature range (C) -40 to 125 Output current (Typ) (mA) 27 2nd harmonic (dBc) 117 3rd harmonic (dBc) 124 GBW (Typ) (MHz) 60 Input bias current (Max) (pA) 600000 Features Shutdown CMRR (Typ) (dB) 110 Rating Catalog
Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.85 Total supply voltage (Max) (+5V=5, +/-5V=10) 12.6 BW @ Acl (MHz) 60 Acl, min spec gain (V/V) 1 Slew rate (Typ) (V/us) 230 Architecture Fully Differential ADC Driver, Bipolar Vn at flatband (Typ) (nV/rtHz) 4 Iq per channel (Typ) (mA) 0.78 Rail-to-rail In to V-, Out Vos (offset voltage @ 25 C) (Max) (mV) 0.25 Operating temperature range (C) -40 to 125 Output current (Typ) (mA) 27 2nd harmonic (dBc) 117 3rd harmonic (dBc) 124 GBW (Typ) (MHz) 60 Input bias current (Max) (pA) 600000 Features Shutdown CMRR (Typ) (dB) 110 Rating Catalog
VQFN (RGT) 16 9 mm² 3 x 3 VSSOP (DGK) 8 15 mm² 3 x 4.9 WQFN (RUN) 10 4 mm² 2 x 2
  • Bandwidth: 60 MHz (G = 1 V/V)
  • Slew Rate: 230 V/µs
  • Gain Bandwidth Product: 68 MHz
  • Voltage Noise:
    • 1/f Voltage Noise Corner: 8 Hz
    • Broadband Noise (≥ 500 Hz): 4 nV/√ Hz
  • Input Offset: ±250 µV (Maximum)
    • Drift: ±4 µV/°C (Maximum)
  • Supply Operating Range: 2.85 V to 12.6 V
  • Supply Current: 775 µA
  • Negative Rail Input (NRI)
  • Rail-to-Rail Output (RRO)
  • Very Low Harmonic Distortion:
    • HD2: –117 dBc at 2 VPP, 100 kHz
    • HD3: –124 dBc at 2 VPP, 100 kHz
  • 0.01% Settling (2-V Step): 90 ns
  • Bandwidth: 60 MHz (G = 1 V/V)
  • Slew Rate: 230 V/µs
  • Gain Bandwidth Product: 68 MHz
  • Voltage Noise:
    • 1/f Voltage Noise Corner: 8 Hz
    • Broadband Noise (≥ 500 Hz): 4 nV/√ Hz
  • Input Offset: ±250 µV (Maximum)
    • Drift: ±4 µV/°C (Maximum)
  • Supply Operating Range: 2.85 V to 12.6 V
  • Supply Current: 775 µA
  • Negative Rail Input (NRI)
  • Rail-to-Rail Output (RRO)
  • Very Low Harmonic Distortion:
    • HD2: –117 dBc at 2 VPP, 100 kHz
    • HD3: –124 dBc at 2 VPP, 100 kHz
  • 0.01% Settling (2-V Step): 90 ns

The THS4561 fully differential amplifier (FDA) offers a simple interface from single-ended sources to the differential output required by precision analog-to-digital converters (ADCs). Designed for a very low,8-Hz, 1/f voltage noise corner and low, 130-dB total harmonic distortion (THD) while consuming only a775-µA quiescent current, the THS4561 is well suited for power-sensitive data acquisition (DAQ) systems where high performance is required with the best signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) through the amplifier and ADC combination.

The THS4561 features the required negative rail input when interfacing a DC-coupled, ground-centered, source signal to a single-supply, differential-input ADC. Low DC error and drift terms support the emerging high-speed and high-resolution successive approximation register (SAR) and delta-sigma (ΔΣ) ADC input requirements. A 2.85-V to 12.6-V supply range with a flexible output common-mode setting with low headroom to the supplies supports a wide range of ADC input and digital-to-analog converter (DAC) output requirements.

The THS4561 device is characterized for operation from –40°C to +125°C.

The THS4561 fully differential amplifier (FDA) offers a simple interface from single-ended sources to the differential output required by precision analog-to-digital converters (ADCs). Designed for a very low,8-Hz, 1/f voltage noise corner and low, 130-dB total harmonic distortion (THD) while consuming only a775-µA quiescent current, the THS4561 is well suited for power-sensitive data acquisition (DAQ) systems where high performance is required with the best signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) through the amplifier and ADC combination.

The THS4561 features the required negative rail input when interfacing a DC-coupled, ground-centered, source signal to a single-supply, differential-input ADC. Low DC error and drift terms support the emerging high-speed and high-resolution successive approximation register (SAR) and delta-sigma (ΔΣ) ADC input requirements. A 2.85-V to 12.6-V supply range with a flexible output common-mode setting with low headroom to the supplies supports a wide range of ADC input and digital-to-analog converter (DAC) output requirements.

The THS4561 device is characterized for operation from –40°C to +125°C.

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Technical documentation

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Type Title Date
* Data sheet THS4561 Low-Power, High Supply Range, 60-MHz, Fully Differential Amplifier datasheet (Rev. D) PDF | HTML 01 Feb 2021
Circuit design Differential input to differential output circuit using a fully-differential amp 07 Jan 2019
Circuit design Single-ended input to differential output circuit using a fully-differential amp 07 Jan 2019
Application note Attenuator Amplifier Design to Maximize the Input Voltage of Differential ADCs 14 Jun 2018
EVM User's guide THS4561 EVM User's Guide 10 Aug 2017
Technical article How to minimize filter loss when you drive an ADC 20 Oct 2016
Technical article Go differential to differentiate your precision design 11 Aug 2016
Technical article How to use a fully differential amplifier as a level shifter 13 Jul 2016
Technical article What you need to know about internal ESD protection on integrated circuits 02 Dec 2015
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

THS4561DGKEVM — THS4561 evaluation module

The THS4561DGKEVM is an evaluation module (EVM) for the single THS4561 amplifier in the DGK (VSSOP-8) package. This EVM is designed to quickly and easily demonstrate the functionality and versatility of the amplifier. The THS4561DGKEVM is ready to connect to power, signal source, and test (...)
Not available on TI.com
Simulation model

THS4561 PSpice Model (Rev. D)

SBOMAE3D.ZIP (28 KB) - PSpice Model
Simulation model

THS4561 TINA-TI Reference Design (Rev. D)

SBOMAE4D.TSC (35 KB) - TINA-TI Reference Design
Simulation model

THS4561 TINA-TI Spice Model (Rev. D)

SBOMAE5D.ZIP (9 KB) - TINA-TI Spice Model
Simulation model

Impedance Spectroscopy TINA-TI Reference Design (Differential)

SBOMBM0.TSC (94 KB) - TINA-TI Reference Design
Simulation model

Discrete Impedance Spectroscopy TINA-TI Reference Design (Single-Ended)

SBOMBM1.TSC (1083 KB) - TINA-TI Reference Design
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
Calculation tool

TI FDA Calculator

SBOR022.ZIP (1639 KB)
Design tool

CIRCUIT060069 — Differential input to differential output circuit using a fully-differential amplifier

This design uses a fully-differential amplifier (FDA) as a differential input to differential output amplifier.
Design tool

CIRCUIT060070 — Single-ended input to differential output circuit using a fully-differential amplifier

This design uses a fully-differential amplifier (FDA) as a single-ended input to differential output amplifier.
Reference designs

TIDA-01040 — Battery Tester Reference Design for High Current Applications

Li-Ion battery formation and electrical testing require accurate voltage and current control, usually to better than ±0.05% over the specified temperature range.  This reference design proposes a solution for high-current (up to 50 A) battery tester applications supporting input (bus) (...)
Schematic: PDF
Reference designs

TIDA-01041 — Battery tester reference design for multi-phase high-precision 0.5 to 100 A battery formation

This reference design provides a multi-phase solution for a wide range of current battery test applications. Leveraging the dual phase buck/boost controller LM5170's daisy chain configuration gives the design the ability to achieve 100A charging/discharging rates. Utilizing high accuracy constant (...)
Schematic: PDF
Reference designs

TIDA-01042 — Modular battery tester reference design for 50-A, 100-A, and 200-A applications

This reference design provides a modular battery test solution allowing users to have the flexibility to test batteries at different current levels with one design. This design leverages the TIDA-01041 reference design by providing two 100-A battery testers that can work independently or be (...)
Schematic: PDF
Reference designs

TIDA-01057 — Reference Design Maximizing Signal Dynamic Range for True 10 Vpp Differential Input to 20 bit ADC

This reference design is designed for high performance data acquisition(DAQ) systems to improve the dynamic range of 20 bit differential input ADCs. Many DAQ systems require the measurement capability at a wide FSR (Full Scale Range) in order to obtain sufficient signal dynamic range. Many earlier (...)
Schematic: PDF
Package Pins Download
QFN (RUN) 10 View options
VQFN (RGT) 16 View options
VSSOP (DGK) 8 View options

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