OPA124UA

Instrumentation, Op Amps, Buffer Amps Overview

The OPA124UA is a precision monolithic FET operational amplifier utilizing the Difet manufacturing process. It features low noise of 6nV/√Hz at 10kHz, maximum bias current of 2pA, and maximum offset voltage of 150μV. The device offers a minimum open-loop gain of 120dB and common-mode rejection of 100dB. Operating on dual supplies from ±5V to ±18V, it draws 2.5mA quiescent current. The SOIC package supports an operating temperature range of -25°C to +85°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Difet fabrication achieves extremely low input bias currents without compromising input voltage noise performance.
• Unique cascode circuitry maintains low input bias current over a wide input common-mode voltage range.
• Laser trimming of thin-film resistors provides very low offset voltage and drift characteristics.

Instrumentation, Op Amps, Buffer Amps Applications

• Precision photodiode preamplifier
• Medical equipment
• Optoelectronics
• Data acquisition systems
• Test equipment

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'UA' indicates the 8-lead SOIC package with specified electrical limits. Confirm the active status for new designs via official Texas Instruments channels. Ensure the procurement source provides original manufacturer documentation to validate authenticity and traceability.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for critical instrumentation requiring superior DC and AC performance compared to standard BIFET or CMOS amplifiers. The absence of offset trim pins in the SOIC version distinguishes it from PDIP packages. Evaluate the trade-off between the fixed laser-trimmed offset and the simplified layout requirements of the surface-mount design.

Instrumentation, Op Amps, Buffer Amps Part Context

The OPA124 series includes variants such as OPA124U, OPA124P, and OPA124PB. The OPA124UA specifically denotes the 8-lead SOIC package variant. Compared to the OPA111, it offers comparable performance while providing flexible packaging options including both plastic DIP and SOIC configurations for different integration needs.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Public confirmed substitute part numbers are not available in the provided datasheet.

Instrumentation, Op Amps, Buffer Amps FAQ

Does the OPA124UA have offset adjustment pins?

No, the offset adjust capability has been removed from the SOIC versions (OPA124UA) to reduce layout leakage errors. Offset adjustment is only available on PDIP packages.

What input protection is required for the OPA124UA?

Unlike conventional BIFET amplifiers, the Difet OPA124 requires input current-limiting resistors only if the input voltage exceeds 6V more negative than the negative supply rail (-VCC).