Overview
The OPA856IDSGR is a high-performance, wideband operational amplifier designed by Texas Instruments. This device is characterized by its low noise and high bandwidth, making it suitable for a variety of demanding applications. The OPA856 features bipolar inputs, which provide excellent noise performance and wideband operation. It is optimized for use in transimpedance and voltage amplifier configurations, particularly in optical time-of-flight (ToF) systems and other high-speed applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Unity-Gain Bandwidth | 1.1 GHz | |
| Gain Bandwidth Product (GBWP) | 1.1 GHz | |
| Slew Rate | 350 V/µs | |
| Input Voltage Noise | 0.9 nV/√Hz | |
| Common-Mode Input Capacitance | 0.4 pF | |
| Differential Input Capacitance | 0.7 pF | |
| Supply Voltage Range | 3.3 V to 5.25 V | |
| Package | 8-pin WSON | |
| Operating Temperature Range | –40°C to +125°C | |
| Output Voltage (High) | 2.35 V to 4.1 V | |
| Output Voltage (Low) | 1.05 V to 1.15 V | |
| Quiescent Current | 15.4 mA to 19.5 mA | |
| Power-Down Quiescent Current | 70 µA to 85 µA |
Key Features
- High unity-gain bandwidth of 1.1 GHz and gain bandwidth product of 1.1 GHz, enabling high closed-loop bandwidths in low-capacitance photodiode applications.
- Low input voltage noise of 0.9 nV/√Hz, making it suitable for high-sensitivity applications.
- Low input capacitance with common-mode input capacitance of 0.4 pF and differential input capacitance of 0.7 pF.
- High slew rate of 350 V/µs, ensuring rapid response to input changes.
- Wide supply voltage range from 3.3 V to 5.25 V, offering flexibility in system design.
- Compact 8-pin WSON package with an exposed thermal pad for efficient heat dissipation.
- Power-down feature with low quiescent current, allowing for power-efficient operation.
Applications
- Optical time domain reflectometry (OTDR)
- 3D scanners
- Laser distance measurement
- Solid-state scanning LIDAR
- Optical ToF position sensors
- Drone vision systems
- Industrial robot LIDAR
- Vacuum robot LIDAR
- Silicon photomultiplier (SiPM) buffer amplifier
- Photomultiplier tube post amplifier
Q & A
- What is the unity-gain bandwidth of the OPA856?
The OPA856 has a unity-gain bandwidth of 1.1 GHz.
- What is the input voltage noise of the OPA856?
The input voltage noise of the OPA856 is 0.9 nV/√Hz.
- What is the slew rate of the OPA856?
The slew rate of the OPA856 is 350 V/µs.
- What is the supply voltage range for the OPA856?
The supply voltage range for the OPA856 is from 3.3 V to 5.25 V.
- What package type is the OPA856 available in?
The OPA856 is available in an 8-pin WSON package.
- What are some typical applications of the OPA856?
The OPA856 is used in applications such as optical time domain reflectometry (OTDR), 3D scanners, laser distance measurement, and LIDAR systems.
- How does the power-down feature work on the OPA856?
The OPA856 has a power-down feature that can be activated by setting the PD pin to a logic low, reducing the quiescent current to 70 µA to 85 µA.
- What is the operating temperature range for the OPA856?
The operating temperature range for the OPA856 is from –40°C to +125°C.
- What are the common-mode and differential input capacitances of the OPA856?
The common-mode input capacitance is 0.4 pF, and the differential input capacitance is 0.7 pF.
- How does the OPA856 perform in terms of harmonic distortion?
The OPA856 exhibits low harmonic distortion, making it suitable for high-fidelity signal processing applications.
