OPA128SM

Instrumentation, Op Amps, Buffer Amps Overview

The OPA128SM is a precision operational amplifier manufactured by Texas Instruments, housed in an 8-pin TO-99 metal can package. It features a single channel with a gain-bandwidth product of 1 MHz and a typical slew rate of 3 V/µs. The device operates on dual power supplies ranging from ±5 V to ±18 V, with typical voltages including ±9 V, ±12 V, and ±15 V. Key electrical parameters include a voltage gain of 128 dB and an input voltage noise density of 92 nV/√Hz. The unit measures 9.08 x 9.08 x 4.4 mm and functions within a temperature range of 0°C to +70°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Utilizes DIFET input technology for ultra-low bias current performance
• Provides high open-loop voltage gain suitable for precision signal conditioning
• Features low input voltage noise density for sensitive applications

Instrumentation, Op Amps, Buffer Amps Applications

• Photodiode amplification circuits
• Precision instrumentation front-ends
• Low-noise sensor signal processing

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'SM' against the official datasheet to confirm package type and material specifications. Ensure the component matches the required operating temperature range of 0°C to +70°C. Confirm that the TO-99 package style aligns with the target PCB or chassis mounting constraints. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and traceability.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when ultra-low input bias current and low noise are critical requirements. The TO-99 package offers robust shielding but requires through-hole mounting. Consider the limited operating temperature range compared to industrial-grade alternatives. Evaluate if the 1 MHz bandwidth meets the system's speed requirements while maintaining high DC precision.

Instrumentation, Op Amps, Buffer Amps Part Context

The OPA128 belongs to Texas Instruments' family of precision JFET-input operational amplifiers. It is designed for applications demanding high accuracy and stability. The SM variant specifically denotes the metal can package configuration. This series is commonly used in scientific and medical equipment where signal integrity is paramount.