LM385Z-1.2/NOPB

Overview

The LM385Z-1.2/NOPB is a fixed shunt voltage reference from Texas Instruments, delivering a nominal output of 1.235 V with an initial accuracy of ±2.0%. Designed for micro-power applications, it operates within a current range of 20 µA to 20 mA and features a temperature coefficient of 150 ppm/°C. The device utilizes a TO-92-3 through-hole package and functions reliably across a commercial temperature range of 0°C to +70°C.

Feature Summary

• Provides stable 1.235 V reference via shunt topology
• Operates efficiently at micro-power levels down to 20 µA
• Ensures low dynamic impedance for consistent regulation

Applications

• Portable instrumentation circuits
• Battery-powered measurement devices
• Analog signal conditioning stages

Procurement Notes

Verify the specific suffix 'NOPB' confirms RoHS compliance and lead-free status as per Texas Instruments documentation. Confirm the TO-92-3 package variant matches the required through-hole mounting specifications for the target PCB design. Ensure the ±2.0% tolerance aligns with the circuit's precision requirements.

Selection Notes

Select this component when a low-cost, fixed 1.235 V reference is needed in a through-hole format. It is suitable for designs prioritizing low quiescent current over ultra-high precision. Consider the 150 ppm/°C temperature drift if operating in environments with significant thermal fluctuations.

Part Context

This part belongs to the LM385 family of adjustable micropower voltage references. While the base LM385 series allows for adjustable outputs, the Z-1.2 designation specifies a factory-trimmed fixed 1.235 V output. The NOPB suffix indicates a non-phosphorus bromine compliant version manufactured by Texas Instruments.

Replacement Considerations

LM385Z-1.2RPG (onsemi) offers similar electrical characteristics in a TO-92 package.