LM385Z-1.2RA

Overview

The LM385Z-1.2RA is a micropower shunt voltage reference diode from the LM385Z series, manufactured by onsemi. It provides a nominal reference voltage of 1.235V with an initial accuracy of ±2%. Designed for operation within a wide current range of 10µA to 20mA, it features low dynamic impedance and low noise. The device utilizes a TO-92 three-pin through-hole package, measuring 5.2 x 4.19 x 5.33mm. It operates between 0°C and +70°C, offering stable performance over time and temperature for precision analog applications.

Feature Summary

• Micropower design suitable for battery-operated portable instruments
• Low dynamic impedance and low noise characteristics
• Wide operating current range from 10µA to 20mA
• Shunt topology with fixed reference voltage

Applications

• Portable instrumentation circuits
• Battery-powered measurement devices
• Precision analog signal conditioning
• Voltage regulation in low-power systems

Procurement Notes

Verify component authenticity against official onsemi documentation due to potential obsolescence status. Confirm package type is TO-92 and pinout matches standard configuration. Check lot codes and date codes for compliance with project requirements. Ensure storage conditions maintain component integrity prior to assembly.

Selection Notes

Select this component when a low-cost, micropower shunt reference is required for non-critical precision applications. It is suitable for designs where ±2% initial accuracy is acceptable. Consider thermal stability requirements within the 0°C to +70°C range. Compare against higher precision variants if tighter tolerances are necessary for the specific circuit topology.

Part Context

This part belongs to the LM385Z family of micropower voltage reference diodes. These devices are designed as bandgap regulators offering excellent long-term stability. The LM385Z series is widely used in applications requiring a stable voltage reference with minimal power consumption, such as portable meters and simple regulator circuits.

Replacement Considerations

LM385Z-1.2G is a verified substitute with identical electrical specifications and TO-92 packaging. Verify pin compatibility and mounting dimensions before substitution.