ZRB500A03

Overview

The ZRB500A03 is a discontinued precision micropower voltage reference manufactured by Diodes Incorporated. It utilizes a bandgap circuit design to provide a stable 5.0V output with an initial accuracy of ±3%. The device operates within a recommended current range of 50µA to 15mA and features a typical temperature coefficient of 15ppm/°C. Designed for industrial applications, it functions reliably between -40°C and +85°C. While the standard SOT23 package is currently available, the E-Line through-hole variants associated with this specific model are obsolete.

Feature Summary

• Bandgap circuit design ensures stable voltage without requiring external capacitors
• Capable of withstanding transient effects and currents up to 200mA due to rugged construction
• Superior switching capability allows the device to reach stable operating conditions in microseconds

Applications

• Battery powered and portable equipment
• Metering and measurement systems
• Instrumentation
• Test equipment
• Data acquisition systems
• Precision power supplies

Procurement Notes

Verify component availability status before procurement planning as the ZRB500A03 variant is listed as obsolete. Confirm that the required tolerance and package type align with current production alternatives. Ensure compliance with RoHS3 specifications if applicable to the target assembly process. Review absolute maximum ratings to prevent damage from reverse or forward current exceeding 25mA during system operation.

Selection Notes

Select this component when a fixed 5.0V reference is required for low-power designs. The wide operating current range supports both micro-power standby modes and higher drive requirements. Consider the ±3% tolerance for general-purpose applications where tighter precision is not critical. Evaluate the industrial temperature range suitability for environments subject to significant thermal fluctuations.

Part Context

The ZRB500 series represents a family of precision voltage references designed for space-saving surface mount and through-hole implementations. This specific part belongs to the legacy E-Line package variants which have been superseded by the SOT23 style packages. The series maintains consistent electrical performance characteristics across different physical form factors while adapting to modern manufacturing constraints.

Replacement Considerations

The datasheet identifies the SOT23 package variants as the closest alternative to the obsolete ZRB500A03. Verify pinout compatibility and ensure the replacement meets the required ±3% tolerance specification. Check for equivalent temperature coefficients and operating current ranges to maintain circuit stability.