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High-speed op amps (GBW ≥ 50 MHz)

OPA855-Q1

ACTIVE

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

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Data sheet

OPA855-Q1

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) 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
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
WSON (DSG) 8 4 mm² (2 mm × 2 mm)
  • 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

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.

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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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet OPA855-Q1 Automotive 8-GHz Gain Bandwidth Product, Gain of 7-V/V Stable, Bipolar Input Amplifier datasheet (Rev. B) PDF | HTML Jan 20, 2023
Application brief Time of Flight and LIDAR - Optical Front End Design (Rev. A) PDF | HTML Apr 29, 2022
Technical article 3 common questions when designing with high-speed amplifiers PDF | HTML Jul 17, 2020

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