LM385D-1.2G

Overview

The LM385D-1.2G is a precision shunt voltage reference from the LM385 series, manufactured by onsemi. It provides a nominal output voltage of 1.235V with an initial accuracy of ±2.0%. Designed for parallel topology operation, it supports a maximum output current of 20mA and features low dynamic impedance. The device operates within a temperature range of 0°C to +70°C and is housed in an 8-pin SOIC surface-mount package.

Feature Summary

• Precision bandgap voltage regulation with tight initial tolerance
• Low dynamic impedance for stable performance across wide current ranges
• Compact surface-mount packaging suitable for automated assembly

Applications

• Portable instrumentation requiring precise voltage references
• Battery-powered analog circuits demanding extended life
• General-purpose power management systems

Procurement Notes

Verify the specific suffix 'D' corresponds to the SOIC-8 package variant rather than TO-92 configurations. Confirm that the ±2.0% accuracy rating aligns with application requirements, as higher precision variants exist within the family. Ensure the commercial temperature range meets environmental constraints.

Selection Notes

Select this component when a fixed 1.235V reference is required in a surface-mount form factor. Consider the ±2.0% tolerance limit against circuit sensitivity needs. Evaluate thermal dissipation capabilities within the SOIC package relative to the maximum 20mA current draw and ambient operating conditions.

Part Context

This part belongs to the LM385 series of micro-power shunt regulators designed for applications requiring low noise and stability over time and temperature. The series utilizes internal trimming to achieve strict voltage tolerances, making it suitable for high-performance analog signal processing and reference generation tasks.

Replacement Considerations

LM385Z-1.2G (TO-92 package, same electrical parameters)

FAQ

What is the recommended operating current range?

The device is designed to operate effectively within a wide current range, typically supporting up to 20mA.

Does the package type affect the pinout?

Yes, the LM385D-1.2G uses an 8-pin SOIC package, which differs physically from the 3-pin TO-92 version while maintaining similar functional terminal definitions.