Texas Instruments (TI) introduced the wideband, low-noise operational amplifier OPA855-Q1 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 graph below 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.
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| Photodiode Capacitance vs Bandwidth and Noise. |
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.
Features
- AEC-Q100 Qualified for Automotive Applications:
- 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 2.00 mm × 2.00 mm
- Temperature Range: –40 °C to +125 °C
Applications
- 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
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| The OPA855DSGEVM Evaluation Module for the OPA855. |
