OPA857IRGTR

Instrumentation, Op Amps, Buffer Amps Overview

The OPA857IRGTR is a wideband, ultralow noise transimpedance amplifier (TIA) from Texas Instruments, designed for photodiode monitoring applications. It features two selectable gain configurations of 5k and 20k while maintaining a nearly constant closed-loop bandwidth in excess of 125 MHz. The device operates on a single supply voltage ranging from 2.6 V to 3.6 V with a typical operating supply current of 23.4 mA. Key electrical specifications include a slew rate of 220 V/us, an input offset voltage of 10 mV, and a maximum supply voltage of 3.6 V. It is housed in a VQFN-16 package suitable for surface mount installation.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultralow noise performance optimized for sensitive photodiode detection
• Dual selectable gain configurations (5k and 20k) with stable bandwidth
• Wideband operation exceeding 125 MHz closed-loop bandwidth

Instrumentation, Op Amps, Buffer Amps Applications

• Photodiode monitoring systems
• Optical front-end design
• Time of Flight (ToF) applications
• LIDAR systems

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix IRGTR indicates the reel packaging variant when ordering. Confirm that the required gain configuration matches the hardware setup, as the OPA857 offers selectable options. Ensure the application environment stays within the specified -40 C to +85 C operating temperature range. Check for any export restrictions or additional documentation requirements if sourcing from regions with strict trade controls. Validate moisture sensitivity levels during storage and handling procedures.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select the OPA857IRGTR when high-speed signal processing with minimal noise is critical. The device is appropriate for designs requiring fixed or switchable transimpedance gains without significant bandwidth variation. Consider the VQFN-16 package constraints for PCB layout and thermal management. Compare against other TI TIA series if different channel counts or power consumption profiles are needed. Ensure the input bias current and offset voltage meet the specific sensor interface requirements.

Instrumentation, Op Amps, Buffer Amps Part Context

This component belongs to the OPA857 series of transimpedance amplifiers. It is part of Texas Instruments' portfolio of high-performance analog signal chain products. The series is specifically engineered for optical sensing applications where speed and noise performance are paramount. Related evaluation tools like the OPA857EVM are available to assist in circuit development and validation.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct substitutes may include other parts from the OPA857 family, such as the OPA857TD1 die version or the OPA857IRGTT cut tape variant. Verify pin compatibility and electrical parameters before swapping packages. No alternative cross-model replacements are confirmed in the provided data.