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High-speed op amps (GBW ≥ 50 MHz)

OPA856

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1.1-GHz unity-gain bandwidth, 0.9 nV/√Hz, bipolar input amplifier

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Data sheet

OPA856

ACTIVE
Data sheet Order now

Product details

Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 3.3 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.25 GBW (typ) (MHz) 1080 BW at Acl (MHz) 1100 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 350 Vn at flatband (typ) (nV√Hz) 0.9 Vn at 1 kHz (typ) (nV√Hz) 0.9 Iq per channel (typ) (mA) 15.5 Vos (offset voltage at 25°C) (max) (mV) 1.5 Rail-to-rail No Features Shutdown Rating Catalog Operating temperature range (°C) -40 to 125 CMRR (typ) (dB) 106 Input bias current (max) (pA) 5000000 Offset drift (typ) (µV/°C) 0.7 Iout (typ) (mA) 100 2nd harmonic (dBc) 85 3rd harmonic (dBc) 95 Frequency of harmonic distortion measurement (MHz) 10
Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 3.3 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.25 GBW (typ) (MHz) 1080 BW at Acl (MHz) 1100 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 350 Vn at flatband (typ) (nV√Hz) 0.9 Vn at 1 kHz (typ) (nV√Hz) 0.9 Iq per channel (typ) (mA) 15.5 Vos (offset voltage at 25°C) (max) (mV) 1.5 Rail-to-rail No Features Shutdown Rating Catalog Operating temperature range (°C) -40 to 125 CMRR (typ) (dB) 106 Input bias current (max) (pA) 5000000 Offset drift (typ) (µV/°C) 0.7 Iout (typ) (mA) 100 2nd harmonic (dBc) 85 3rd harmonic (dBc) 95 Frequency of harmonic distortion measurement (MHz) 10
WSON (DSG) 8 4 mm² 2 x 2
  • Unity-gain bandwidth: 1.1 GHz
  • Gain bandwidth product: 1.1 GHz
  • Slew rate: 350 V/µs
  • Low input voltage noise: 0.9 nV/√Hz
  • Low input capacitance:
    • Common-mode: 0.4 pF
    • Differential: 0.7 pF
  • Supply voltage range: 3.3 V to 5.25 V
  • Package: 8-pin WSON
  • Temperature range: –40°C to +125°C
  • Unity-gain bandwidth: 1.1 GHz
  • Gain bandwidth product: 1.1 GHz
  • Slew rate: 350 V/µs
  • Low input voltage noise: 0.9 nV/√Hz
  • Low input capacitance:
    • Common-mode: 0.4 pF
    • Differential: 0.7 pF
  • Supply voltage range: 3.3 V to 5.25 V
  • Package: 8-pin WSON
  • Temperature range: –40°C to +125°C

The OPA856 is a wideband, low-noise operational amplifier with bipolar inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 1.1-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths in low-capacitance photodiode applications.

The graph below shows the bandwidth and noise performance of the OPA856 as a function of the photodiode capacitance when the amplifier is configured as a TIA. The total noise is calculated along a bandwidth range extending from DC to the calculated frequency (f) on the left scale. The OPA856 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA856 is optimized to operate in optical time-of-flight (ToF) systems where the OPA856 is used with time-to-digital converters, such as the TDC7201. Use the OPA856 to drive a high-speed analog-to-digital converter (ADC) in high-resolution LIDAR systems with a differential output amplifier, such as the THS4541 or LMH5401.

The OPA856 is a wideband, low-noise operational amplifier with bipolar inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 1.1-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths in low-capacitance photodiode applications.

The graph below shows the bandwidth and noise performance of the OPA856 as a function of the photodiode capacitance when the amplifier is configured as a TIA. The total noise is calculated along a bandwidth range extending from DC to the calculated frequency (f) on the left scale. The OPA856 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA856 is optimized to operate in optical time-of-flight (ToF) systems where the OPA856 is used with time-to-digital converters, such as the TDC7201. Use the OPA856 to drive a high-speed analog-to-digital converter (ADC) in high-resolution LIDAR systems with a differential output amplifier, such as the THS4541 or LMH5401.
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Technical documentation

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* Data sheet OPA856 1.1-GHz Unity-Gain Bandwidth, 0.9 nV /√Hz , Bipolar Input Amplifier datasheet PDF | HTML 05 Oct 2020
More literature Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005

Design & development

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Evaluation board

DEM-OPA-WSON8-EVM — Unpopulated evaluation module for single channel op-amps in the DSG (8-pin WSON) package

The DEM-OPA-WSON8-EVM is an unpopulated evaluation module for the single channel op-amps in the DSG (8-pin WSON) package. This EVM is designed to high-speed performance specifications and is compatible with amplifiers that have over 1 GHz of gain bandwidth.
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Simulation model

OPA856 Unencrypted PSPICE Model Package

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Simulation model

OPA856 Unencrypted TINA-TI Reference Design Package

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Calculation tool

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VOLT-DIVIDER-CALC quickly determines a set of resistors for a voltage divider. This KnowledgeBase Javascript utility can be used to find a set of resistors for a voltage divider to achieve the desired output voltage. This calculator can also be used to design non-inverting attentuation circuits.

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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 (...)
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