LM236Z

Overview

The LM236Z is a precision 2.5V voltage reference diode manufactured by STMicroelectronics in a TO-92 plastic package. It operates within an ambient temperature range of -25°C to +85°C. The device functions as a monolithic IC with a low temperature coefficient and a dynamic impedance of 0.2Ω at 1mA reverse current. It supports a wide operating current range from 400µA to 10mA. A dedicated third pin allows for the adjustment of the reference voltage and temperature coefficient, enabling optimization for specific circuit requirements.

Feature Summary

• Monolithic precision regulator diode providing stable 2.5V breakdown voltage
• Low dynamic impedance of 0.2Ω facilitates biasing in various circuits
• Third pin enables independent adjustment of reference voltage and temperature coefficient

Applications

• Precision power regulators requiring low temperature coefficients
• Wide input range reference circuits
• Adjustable shunt regulators
• Linear ohmmeters
• Bipolar output references

Procurement Notes

Verify the exact ordering suffix against the manufacturer's official documentation before procurement. Confirm that the component matches the specified TO-92 package and the required -25°C to +85°C temperature range. Ensure the selected variant aligns with the intended packing method, such as bulk or tape and reel, as indicated in the official order codes table.

Selection Notes

Select the LM236Z when a fixed 2.5V reference with high stability is required. The device is suitable for applications needing a wide operating current range up to 10mA. Utilize the adjustment pin if circuit calibration requires fine-tuning the initial tolerance or optimizing the temperature coefficient beyond standard specifications.

Part Context

The LM236Z belongs to the LM236-LM336 family of precision voltage references. These devices are designed to operate similarly to Zener diodes but offer superior performance characteristics, including lower dynamic impedance and guaranteed temperature stability. The family includes variants like the LM336B with different temperature ranges and packaging options.

Replacement Considerations

Consult the manufacturer's datasheet for officially confirmed substitute part numbers. Verify compatibility regarding package type, electrical parameters, and temperature range before replacing the component.