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High-speed op amps (GBW ≥ 50 MHz)

THS4631

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High Speed FET-Input Operational Amplifier

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Data sheet

THS4631

ACTIVE
Data sheet Order now

Product details

Architecture FET / CMOS Input, Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 10 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 32 GBW (typ) (MHz) 210 BW at Acl (MHz) 325 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 1000 Vn at flatband (typ) (nV√Hz) 7 Vn at 1 kHz (typ) (nV√Hz) 7 Iq per channel (typ) (mA) 12.5 Vos (offset voltage at 25°C) (max) (mV) 0.5 Rail-to-rail No Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 95 Input bias current (max) (pA) 100 Offset drift (typ) (µV/°C) 2.5 Iout (typ) (mA) 95 2nd harmonic (dBc) 76 3rd harmonic (dBc) 94 Frequency of harmonic distortion measurement (MHz) 5
Architecture FET / CMOS Input, Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 10 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 32 GBW (typ) (MHz) 210 BW at Acl (MHz) 325 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 1000 Vn at flatband (typ) (nV√Hz) 7 Vn at 1 kHz (typ) (nV√Hz) 7 Iq per channel (typ) (mA) 12.5 Vos (offset voltage at 25°C) (max) (mV) 0.5 Rail-to-rail No Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 95 Input bias current (max) (pA) 100 Offset drift (typ) (µV/°C) 2.5 Iout (typ) (mA) 95 2nd harmonic (dBc) 76 3rd harmonic (dBc) 94 Frequency of harmonic distortion measurement (MHz) 5
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) HSOIC (DDA) 8 29.4 mm² (4.9 mm × 6 mm) HVSSOP (DGN) 8 14.7 mm² (3 mm × 4.9 mm)
  • High bandwidth:
    • 325MHz in unity gain
    • 210MHz gain bandwidth product
  • High slew rate:
    • 900V/µs (G = 2)
    • 1000V/µs (G = 5)
  • Low distortion of –76dB, SFDR at 5MHz
  • Maximum input bias current: 100pA
  • Input voltage noise: 7nV/√Hz
  • Maximum input offset voltage: 500µV at 25°C
  • Low offset drift: 2.5µV/°C
  • Input impedance: 109 || 3.9pF
  • Wide supply range: ± 5V to ± 15V
  • High output current: 95mA
  • High bandwidth:
    • 325MHz in unity gain
    • 210MHz gain bandwidth product
  • High slew rate:
    • 900V/µs (G = 2)
    • 1000V/µs (G = 5)
  • Low distortion of –76dB, SFDR at 5MHz
  • Maximum input bias current: 100pA
  • Input voltage noise: 7nV/√Hz
  • Maximum input offset voltage: 500µV at 25°C
  • Low offset drift: 2.5µV/°C
  • Input impedance: 109 || 3.9pF
  • Wide supply range: ± 5V to ± 15V
  • High output current: 95mA

The THS4631 is a high-speed, FET-input op amp designed for applications requiring wideband operation, high-input impedance, and high-power supply voltages. By providing a 210MHz gain bandwidth product, ±15V supply operation, and 100pA input bias current, the THS4631 is capable of simultaneous wideband transimpedance gain and large output signal swing. The fast 1000V/µs slew rate allows for fast settling times and good harmonic distortion at high frequencies. Low current and voltage noise allow amplification of extremely low-level input signals while still maintaining a large signal-to-noise ratio.

These high-performance characteristics make the THS4631 an excellent choice for use as a wideband photodiode amplifier. Photodiode output current is a prime candidate for transimpedance amplification. Other potential applications include test and measurement systems requiring high-input impedance, ADC and DAC buffering, high-speed integration, and active filtering.

The THS4631 is offered in a 8-pin SOIC (D) package, and 8-pin HSOIC (DDA) and HVSSOP (DGN) with PowerPAD™ integrated-circuit packages.

The THS4631 is a high-speed, FET-input op amp designed for applications requiring wideband operation, high-input impedance, and high-power supply voltages. By providing a 210MHz gain bandwidth product, ±15V supply operation, and 100pA input bias current, the THS4631 is capable of simultaneous wideband transimpedance gain and large output signal swing. The fast 1000V/µs slew rate allows for fast settling times and good harmonic distortion at high frequencies. Low current and voltage noise allow amplification of extremely low-level input signals while still maintaining a large signal-to-noise ratio.

These high-performance characteristics make the THS4631 an excellent choice for use as a wideband photodiode amplifier. Photodiode output current is a prime candidate for transimpedance amplification. Other potential applications include test and measurement systems requiring high-input impedance, ADC and DAC buffering, high-speed integration, and active filtering.

The THS4631 is offered in a 8-pin SOIC (D) package, and 8-pin HSOIC (DDA) and HVSSOP (DGN) with PowerPAD™ integrated-circuit packages.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet THS4631 High-Voltage, High-Slew-Rate, Wideband FET-Input Operational Amplifier datasheet (Rev. D) PDF | HTML Mar 5, 2026
Application note Transimpedance Amplifiers (TIA): Choosing the Best Amplifier for the job (Rev. A) May 16, 2017
E-book The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML Mar 28, 2017
Application note Transimpedance Considerations for High-Speed Operational Amplifiers Nov 22, 2009

Design & development

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

Evaluation board

THS4631DDAEVM — THS4631DDAEVM Evaluation Module

THS4631EVM's is an evaluation Module for the DDA (8 pin SOIC power pad)  package.

The THS4631EVM's are designed to demonstrate the functionality and versatility of the device. The EVM is ready for power, signal source, and test instruments.

The THS4631 evaluation module (EVM) User's Guide is included (...)

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Evaluation board

THS4631DGNEVM — THS4631DGNEVM Evaluation Module

THS4631EVM's is an evaluation Module for the DGN (8-pin MSOP power pad) package.

The THS4631EVM's are designed to demonstrate the functionality and versatility of the device. The EVM is ready for power, signal source, and test instruments.

The THS4631 evaluation module (EVM) User's Guide is included (...)

Supported products & hardware
In stock
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Simulation model

THS4631 PSpice Model (Rev. E)

SLOC051E.ZIP (24 KB) - PSpice model
Supported products & hardware
Simulation model

THS4631 TINA-TI Reference Design (Rev. B)

SLOC127B.TSC (20 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

THS4631 TINA-TI Spice Model (Rev. A)

SLOM248A.ZIP (4 KB) - TINA-TI Spice model
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
HSOIC (DDA) 8 Ultra Librarian
HVSSOP (DGN) 8 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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