LM336D

Overview

The LM336D is a precision 2.5V voltage reference integrated circuit manufactured by STMicroelectronics. It operates as a monolithic shunt regulator diode with a nominal breakdown voltage of 2.5 volts. The device features a low temperature coefficient and a dynamic impedance of 0.2 ohms, ensuring stable performance across varying thermal conditions. A third pin allows for external adjustment of the reference voltage and temperature compensation. It supports an operating current range from 400 microamperes to 10 milliamperes, facilitating fast turn-on times and reliable regulation in precision analog applications.

Feature Summary

• Provides a precise 2.5V reference voltage with low temperature drift characteristics
• Features a third terminal for programmable voltage adjustment and temperature coefficient optimization
• Exhibits low dynamic impedance of 0.2 ohms for stable shunt regulation
• Supports wide operating current range from 400µA to 10mA

Applications

• Precision voltage reference sources in measurement systems
• Analog-to-digital converter (ADC) reference inputs
• Temperature compensated power supply circuits
• Battery monitoring and calibration circuits

Procurement Notes

Verify the specific suffix 'D' indicates the SO-8 package variant when ordering. Confirm the datasheet version matches the required temperature stability specifications. Ensure the application circuit provides sufficient current within the 400µA to 10mA range for proper regulation. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this component when a fixed 2.5V reference is required with high accuracy. The adjustable pin allows customization if system requirements deviate from the standard 2.5V nominal. Consider the 0.2Ω dynamic impedance for noise-sensitive applications. Compare against LM236 variants if lower cost or different packaging options are needed for the same electrical performance.

Part Context

The LM336 series belongs to STMicroelectronics' family of precision voltage references. It is functionally compatible with industry-standard equivalents like the National Semiconductor LM336-2.5. The 'D' suffix typically denotes surface-mount packaging, distinguishing it from through-hole variants. This IC serves as a fundamental building block for analog signal conditioning and reference generation in electronic designs.

Replacement Considerations

Direct substitutes include the LM236D for commercial grade alternatives. Other manufacturers offer equivalent parts such as the LM336-2.5 from Texas Instruments or Fairchild. Verify pinout compatibility and package dimensions before substitution. Ensure temperature coefficients meet the specific design requirements.