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OPA856
  • OPA856
  • OPA856
  • OPA856

OPA856

ACTIVE

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

Texas Instruments OPA856 Product Info

1 April 2026 3

Parameters

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)

17.2

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

Package

WSON (DSG)-8-4 mm² 2 x 2

Features

  • 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

Description

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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