LM385D-1.2

Overview

The LM385D-1.2 is a micropower two-terminal bandgap voltage reference diode manufactured by ON Semiconductor. It provides a nominal output voltage of 1.235V with an initial precision of ±2.0%. The device operates within a wide current range from 10 µA to 20 mA, featuring low dynamic impedance and stable performance over time and temperature. It is housed in an 8-pin SOIC surface-mount package with dimensions of 5 x 4 x 1.5 mm. The component is rated for commercial operation between 0°C and +70°C, offering load regulation of 20 mV.

Feature Summary

• Micropower two-terminal bandgap design for stable voltage referencing
• Low dynamic impedance and low noise characteristics
• Wide dynamic operating current range for flexible supply applications
• Surface-mount packaging for automated assembly

Applications

• Portable instrumentation circuits requiring extended battery life
• Precision analog circuitry and regulators
• Microprocessor reset circuits
• Battery-powered monitoring systems

Procurement Notes

Verify the manufacturer marking on the component body to confirm ON Semiconductor origin, as Texas Instruments also produces this part number. Ensure the SOIC-8 package matches the required footprint. Confirm the suffix 'G' indicates lead-free compliance if environmental standards are mandatory. Cross-reference the datasheet revision date to ensure parameter consistency with your design specifications.

Selection Notes

Select this component when a fixed 1.235V reference is needed in a surface-mount format. It is suitable for designs requiring low quiescent current to preserve battery life. Compare against TO-92 versions if through-hole mounting is preferred. Consider the ±2.0% tolerance grade against tighter requirements like the B-grade variants if higher precision is necessary for the specific application accuracy.

Part Context

The LM385 series belongs to a family of micropower shunt voltage references widely used in analog electronics. The 'D' suffix denotes the SOIC surface-mount package variant, distinguishing it from the TO-92 plastic case (Z suffix) or other package types. This specific model represents the commercial temperature grade version, differing from the industrial LM285 series which supports wider temperature ranges.

Replacement Considerations

• LM385M-1.2/NOPB
• LM385D-1.2/NOPB