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THS4561

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Low-power, 60-MHz, wide-supply-range fully differential amplifier

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Data sheet

THS4561

ACTIVE
Data sheet Order now

Product details

Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.85 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12.6 BW at Acl (MHz) 60 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 230 Architecture Bipolar, Fully Differential ADC Driver Vn at flatband (typ) (nV√Hz) 4 Iq per channel (typ) (mA) 0.78 Rail-to-rail In to V-, Out Vos (offset voltage at 25°C) (max) (mV) 0.25 Operating temperature range (°C) -40 to 125 Iout (typ) (mA) 27 2nd harmonic (dBc) 117 3rd harmonic (dBc) 124 Frequency of harmonic distortion measurement (MHz) 0.1 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 (+5 V = 5, ±5 V = 10) (min) (V) 2.85 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12.6 BW at Acl (MHz) 60 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 230 Architecture Bipolar, Fully Differential ADC Driver Vn at flatband (typ) (nV√Hz) 4 Iq per channel (typ) (mA) 0.78 Rail-to-rail In to V-, Out Vos (offset voltage at 25°C) (max) (mV) 0.25 Operating temperature range (°C) -40 to 125 Iout (typ) (mA) 27 2nd harmonic (dBc) 117 3rd harmonic (dBc) 124 Frequency of harmonic distortion measurement (MHz) 0.1 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 14.7 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
Application brief Using TI ADCs for Noise, Vibration, and Harshness Measurements PDF | HTML 03 Dec 2024
Application note Anti-Alias Filter Design for a 100kHz Bandwidth Data Acquisition Signal Chain PDF | HTML 02 Dec 2024
Circuit design Differential input to differential output circuit using a fully-differential amp (Rev. A) PDF | HTML 25 Sep 2024
Circuit design Single-ended input to differential output circuit using a fully-differential amp (Rev. A) PDF | HTML 25 Sep 2024
Product overview Pairing ADC Drivers With Fully-Differential Input ADCs for Wide Bandwidth Data Acquisition 01 Apr 2024
Product overview PLC Analog Input Front-End Architectures PDF | HTML 31 Jul 2022
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
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005

Design & development

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Supported products & hardware

Supported products & hardware

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Package Pins CAD symbols, footprints & 3D models
VQFN (RGT) 16 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian
WQFN (RUN) 10 Ultra Librarian
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