REF02AJ8

Overview

The REF02AJ8 is a precision voltage reference IC manufactured by Analog Devices Inc., operating within the REF-02 series. It provides a fixed 5V output with an accuracy of ±0.3%. The device features a typical temperature coefficient of 5ppm/°C and low noise characteristics, specifically 10µVp-p in the 0.1Hz to 10Hz range. It operates on a supply voltage between 7V and 40V with a maximum quiescent current of 1.4mA. The component supports a load current of up to 20mA and includes a dedicated temperature output pin providing a linear voltage proportional to absolute temperature. It is housed in an 8-Lead CERDIP (J8) package and is guaranteed for operation across a wide temperature range from -55°C to 125°C.

Feature Summary

• Provides stable 5V bandgap reference output with high line and load regulation.
• Includes a dedicated temperature output pin for linear voltage proportional to absolute temperature.
• Features low drift and low noise performance suitable for precision applications.
• Capable of indefinite short-circuit duration to ground.

Applications

• A/D and D/A Converters
• Precision Regulators
• Constant Current Sources
• V/F Converters
• Bridge Excitation

Procurement Notes

Verify that the specific ordering suffix matches the required package type and lead finish. Confirm the temperature grade aligns with system requirements, as the J8 package variant specified here covers the extended industrial range. Ensure compatibility with existing PCB footprints for the 8-Lead CERDIP configuration before finalizing procurement orders.

Selection Notes

Select this component when a fixed 5V reference with high accuracy and low drift is required over a wide temperature range. The inclusion of a temperature output pin makes it suitable for systems needing simultaneous voltage referencing and thermal monitoring. Consider the CERDIP package for hermetic sealing needs compared to plastic alternatives.

Part Context

This part belongs to the REF-01/REF-02 family of precision voltage references designed for applications requiring stable output voltages under varying conditions. The REF-02 variant specifically adds a temperature sensing capability alongside the primary voltage reference function. These devices are engineered to offer a balance of moderate accuracy, low power consumption, and cost-effectiveness.

Replacement Considerations

The REF02AH is a pin-compatible alternative in an 8-Lead TO-5 Metal Can package offering the same electrical specifications and extended temperature range.

FAQ

What is the purpose of Pin 3 on the REF02AJ8?

Pin 3 serves as the Temperature Output, providing a linear voltage proportional to absolute temperature, which is unique to the REF-02 series.

Can the REF02AJ8 withstand short circuits to ground indefinitely?

Yes, the datasheet specifies that the device allows for indefinite short-circuit duration to ground.