LM385PSR-1-2

Overview

The LM385PSR-1-2 is a micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed nominal output voltage of 1.235 V with an initial accuracy of ±2%. The device operates within a temperature range of 0°C to +70°C and features a typical temperature coefficient of 20 ppm/°C. It supports a maximum cathode current of 20 mA and has a minimum operating current of 15 µA. The component is housed in an 8-VSSOP package and is supplied in tape and reel packaging for surface-mount applications.

Feature Summary

• Micropower two-terminal bandgap voltage reference diode
• Fixed 1.235 V output voltage
• Low dynamic impedance and low noise characteristics
• Stable operation over time and temperature

Applications

• Portable instrumentation
• Battery-powered systems
• Data acquisition systems
• Microprocessor supervisory circuits

Procurement Notes

Verify the specific suffix 'PSR' corresponds to the 8-VSSOP package and tape-and-reel configuration. Confirm RoHS compliance status as manufacturing processes may vary. Check for active lifecycle status or obsolescence notices from Texas Instruments before finalizing procurement plans.

Selection Notes

Select this component when a precise 1.235 V reference is required in space-constrained surface-mount designs. Ensure the application current remains within the 15 µA to 20 mA range for optimal performance. Consider thermal management if operating near the upper temperature limit.

Part Context

This part belongs to the LM385 family of micropower voltage references, which are widely used for providing stable reference voltages in analog and mixed-signal circuits. The family includes adjustable and fixed versions in various packages such as TO-92, SOIC, and VSSOP.

Replacement Considerations

LM385PWR-1-2: Similar 8-TSSOP package variant. LM385BLPR-1-2: Higher precision (±1%) alternative in SOT-23 package.