MC1403D

Overview

The MC1403D is a series voltage reference IC manufactured by onsemi, housed in an 8-SOIC package. It provides a fixed output voltage of 2.5V with a tolerance of ±1%. The device operates within an input voltage range of 4.5V to 40V and delivers a maximum output current of 10 mA. Quiescent supply current is specified at 1.5 mA. The component features a temperature coefficient of 40 ppm/°C and functions reliably across a junction temperature range of 0°C to 70°C.

Feature Summary

• Provides a stable 2.5V fixed output voltage for precision applications
• Features low temperature drift characteristics suitable for accurate referencing
• Supports wide input voltage ranges up to 40V for flexible power integration

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Digital-to-analog converter (DAC) voltage references
• Calibration circuits requiring stable voltage baselines
• Battery-powered systems needing efficient reference generation

Procurement Notes

Verify the specific suffix 'D' indicates the SOIC-8 surface-mount package variant when sourcing replacements. Confirm that the ±1% tolerance meets the system's accuracy requirements, as looser tolerances may exist in other variants. Ensure the operating temperature range of 0°C to 70°C aligns with the environmental conditions of the target application to prevent performance degradation or failure under thermal stress.

Selection Notes

Select this component when a fixed 2.5V reference is required with moderate precision and wide input voltage capability. Consider the 40 ppm/°C temperature coefficient against stricter stability needs; lower drift options like the MC1404 may be necessary for high-accuracy metrology. Evaluate the 10 mA output current limit to ensure it suffices for the load without external buffering. Compare package availability between through-hole and surface-mount versions if board layout constraints dictate a specific form factor.

Part Context

The MC1403D belongs to the MC1403 family of precision voltage references from onsemi. This family includes various output voltages and packages, such as the MC1403BDR2G in tape-and-reel packaging. The D suffix specifically denotes the 8-SOIC plastic package configuration. These devices are designed to replace higher-drift zener diodes in applications requiring improved long-term stability and lower noise performance for signal conditioning circuits.

Replacement Considerations

Direct substitutes include the MC1403BDG and MC1403BDR2G, which share identical electrical specifications and pinouts. Verify package compatibility when swapping between tube and reel formats.