Product
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OPA855-Q1
  • OPA855-Q1
  • OPA855-Q1
  • OPA855-Q1

OPA855-Q1

ACTIVE

Automotive 8-GHz gain bandwidth, decompensated transimpedance amplifier with bipolar input

Texas Instruments OPA855-Q1 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)

8000

BW at Acl (MHz)

2500

Acl, min spec gain (V/V)

7

Slew rate (typ) (V/µs)

2750

Vn at flatband (typ) (nV√Hz)

0.98

Vn at 1 kHz (typ) (nV√Hz)

2.8

Iq per channel (typ) (mA)

17.8

Vos (offset voltage at 25°C) (max) (mV)

1.5

Rail-to-rail

No

Features

Decompensated, Shutdown

Rating

Automotive

Operating temperature range (°C)

-40 to 125

CMRR (typ) (dB)

100

Input bias current (max) (pA)

5000000

Offset drift (typ) (µV/°C)

0.5

Iout (typ) (mA)

80

2nd harmonic (dBc)

90

3rd harmonic (dBc)

86

Frequency of harmonic distortion measurement (MHz)

10

Package

WSON (DSG)-8-4 mm² 2 x 2

Features

  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • High gain bandwidth product: 8 GHz
  • Decompensated, gain ≥ 7 V/V (stable)
  • Low input voltage noise: 0.98 nV/√Hz
  • Slew rate: 2750 V/µs
  • Low Input capacitance:
    • Common-mode: 0.6 pF
    • Differential: 0.2 pF
  • Wide input common-mode range:
    • 0.4 V from positive supply
    • 1.1 V from negative supply
  • 3 VPP total output swing
  • Supply voltage range: 3.3 V to 5.25 V
  • Quiescent current: 17.8 mA
  • Package: 8-pin WSON
  • Temperature range: –40°C to +125°C
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • High gain bandwidth product: 8 GHz
  • Decompensated, gain ≥ 7 V/V (stable)
  • Low input voltage noise: 0.98 nV/√Hz
  • Slew rate: 2750 V/µs
  • Low Input capacitance:
    • Common-mode: 0.6 pF
    • Differential: 0.2 pF
  • Wide input common-mode range:
    • 0.4 V from positive supply
    • 1.1 V from negative supply
  • 3 VPP total output swing
  • Supply voltage range: 3.3 V to 5.25 V
  • Quiescent current: 17.8 mA
  • Package: 8-pin WSON
  • Temperature range: –40°C to +125°C

Description

The OPA855-Q1 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 8-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths at transimpedance gains of up to tens of kΩs.

The following graph shows the bandwidth and noise performance of the OPA855-Q1 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 OPA855-Q1 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA855-Q1 is optimized to operate in optical time-of-flight (ToF) systems where the OPA855-Q1 is used with time-to-digital converters, such as the TDC7201. Use the OPA855-Q1 to drive a high-speed analog-to-digital converter (ADC) in high-resolution LIDAR systems with a differential output amplifier, such as the THS4541-Q1.

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