• AEC-Q100 Qualified for Automotive Applications:
  • Temperature grade 1: –40°C to +125°C, T_A
• High Gain Bandwidth Product: 5.5 GHz
• Decompensated, Gain ≥ 7 V/V (Stable)
• Ultra-Low Bias Current MOSFET Inputs: 10 pA
• Low Input Voltage Noise: 2.5 nV/√Hz
• Slew rate: 2000 V/µs
• Low Input Capacitance:
  • Common-Mode: 0.6 pF
  • Differential: 0.2 pF
• Wide Input Common-Mode Range:
  • 1.4 V from Positive Supply
  • Includes Negative Supply
• 2.5 V_PP Output Swing in TIA Configuration
• Supply Voltage Range: 3.3 V to 5.25 V
• Quiescent Current: 20.5 mA
• Package: 8-Pin WSON
• Temperature Range: –40°C to +125°C

• Automotive LIDAR
• Time of flight (ToF) Camera
• Optical Time Domain Reflectometry (OTDR)
• 3D Scanner
• Laser Distance Measurement
• Solid-State Scanning LIDAR
• Optical ToF Position Sensor
• Drone Vision
• Silicon Photomultiplier (SiPM) Buffer Amplifier
• Photomultiplier Tube Post Amplifier

The OPA858-Q1 is a wideband, low-noise operational amplifier with CMOS inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 5.5-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths at transimpedance gains in the range of tens to hundreds of kΩs.

The graph below shows the bandwidth and noise performance of the OPA858-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 OPA858-Q1 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA858-Q1 is optimized to operate in optical time-of-flight (ToF) systems where the OPA858-Q1 is used with time-to-digital converters, such as the TDC7201. Use the OPA858-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.

High-Speed Time-of-Flight Receiver

 Photodiode Capacitance vs Bandwidth and Noise