LM385PWR-1-2

Overview

The LM385PWR-1-2 is a micropower shunt voltage reference manufactured by Texas Instruments, originally developed under the National Semiconductor brand. It provides a fixed nominal output voltage of 1.235 V with an initial accuracy of 1%. The device operates within a temperature range of 0°C to +70°C and features a maximum shunt current of 20 mA. Packaged in an 8-pin TSSOP format, it serves as a stable reference for precision analog circuits.

Feature Summary

• Provides a precise fixed reference voltage suitable for high-accuracy applications
• Operates efficiently at micropower levels to minimize energy consumption
• Designed for surface-mount integration via compact TSSOP packaging

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Battery-powered instrumentation requiring low quiescent current
• Portable measurement devices needing stable voltage benchmarks

Procurement Notes

Verify component authenticity through authorized distributors due to legacy status. Confirm package integrity upon receipt. Ensure storage conditions prevent moisture damage. Validate datasheet revisions match specific manufacturing batches. Check for obsolescence notices from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a fixed 1.235 V reference is required in a surface-mount design. Consider the 1% initial accuracy and 20 ppm/°C temperature coefficient for thermal stability needs. Evaluate the 20 mA maximum current capability against load requirements. Compare against adjustable variants if flexible voltage settings are necessary.

Part Context

This part belongs to the LM385 family of micropower voltage references, widely used in industrial and consumer electronics. Originally introduced by National Semiconductor, production continues under Texas Instruments following their acquisition. The series includes both fixed and adjustable versions, offering flexibility for various precision reference applications across different operating temperatures.

Replacement Considerations

LM385BPW-1-2: Higher precision variant with tighter tolerance specifications. LM385M/NOPB: Adjustable version offering flexible voltage configuration options. LM385BLP-1-2: Through-hole alternative providing similar electrical characteristics in a different package style.