MC1403DT

Overview

The MC1403DT is a precision serial voltage reference manufactured by STMicroelectronics, providing a stable 2.5 V output. It features a typical temperature coefficient of 10 ppm/°C and operates within an input voltage range of 4.5 V to 40 V. The device draws a typical quiescent current of 1.2 mA and supports an output current of up to 10 mA. Packaged in an 8-pin SOIC (DT suffix), it serves as a low-noise reference for instrumentation and data conversion systems.

Feature Summary

• Provides a precise 2.5 V reference voltage with low temperature drift
• Operates over a wide input voltage range from 4.5 V to 40 V
• Designed for high stability in critical instrumentation applications

Applications

• Voltage reference for 8 to 12-bit D/A converters
• Low temperature coefficient Zener diode replacement
• High stability current reference circuits
• Voltmeter system references

Procurement Notes

Verify the manufacturer marking on the component body to confirm STMicroelectronics origin, as other vendors like Motorola or ON Semiconductor also produced parts with the MC1403 designation. Ensure the 'DT' suffix corresponds to the SOIC-8 package variant required for your PCB layout. Cross-reference datasheets carefully to distinguish between the ST version and other manufacturers' specifications.

Selection Notes

Select this component when a fixed 2.5 V reference is required for moderate precision applications. It is suitable for replacing higher-cost bandgap references in cost-sensitive designs. Consider the 10 mA output capability if driving low-impedance loads directly. Verify that the 10 ppm/°C temperature coefficient meets the thermal stability requirements of the target system.

Part Context

The MC1403 series represents a family of precision voltage references originally developed for instrumentation use. STMicroelectronics offers this part as a cost-effective alternative to higher-performance bandgap references. The DT package variant ensures compatibility with standard surface-mount assembly processes, facilitating integration into compact electronic devices requiring stable voltage sources.

Replacement Considerations

The AD580 is listed as an equivalent part number in public documentation.