REF02EZ

Overview

The REF02EZ is a precision series voltage reference IC manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output voltage of 5V with an initial accuracy tolerance of ±0.3%. The device features a maximum temperature coefficient of 8.5 ppm/°C and operates within an extended industrial temperature range of -40°C to +85°C. It requires an input voltage between 7V and 40V, draws a supply current of 1.4mA, and can deliver an output current of up to 10mA. The component is housed in an 8-SOIC surface-mount package.

Feature Summary

• High output accuracy with a maximum tolerance of ±0.3% for the 5V variant
• Excellent temperature stability characterized by a low maximum drift of 8.5 ppm/°C
• Low noise performance with typical ripple and noise of 15 µV p-p measured from 0.1Hz to 10Hz

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Digital-to-analog converter (DAC) voltage references
• Instrumentation amplifier biasing circuits
• Battery-powered measurement systems requiring stable reference voltages

Procurement Notes

Verify the specific suffix requirements for RoHS compliance and lead times directly with authorized distributors or the manufacturer. Confirm that the 8-SOIC package dimensions match your PCB footprint constraints. Ensure the input voltage supplied to the circuit remains within the specified 7V to 40V range to maintain regulation and prevent damage. Check for any recent product change notices regarding manufacturing site transfers.

Selection Notes

Select the REF02EZ when a fixed 5V reference with high precision and low temperature drift is required. Compare its 8.5 ppm/°C temperature coefficient against other series references if thermal stability is critical. Consider the 10mA output current capability to ensure it meets the load requirements of the downstream circuitry without external buffering. Evaluate the 8-SOIC package size against available board space compared to through-hole alternatives like the PDIP version.

Part Context

The REF02EZ belongs to the REF01/REF02/REF03 family of precision voltage references designed for high-performance data acquisition systems. This family utilizes bandgap technology to provide stable reference voltages with low noise and excellent long-term stability. The REF02 variant specifically targets applications needing a 5V output, complementing the 10V REF01 and 2.5V REF03 options within the same architectural framework.

Replacement Considerations

Direct pin-compatible replacements may include the REF02HP+ or REF02DN8#PBF for different package styles. Verify that alternative components meet the same ±0.3% accuracy and 8.5 ppm/°C temperature coefficient specifications. Ensure the replacement supports the required 10mA output current and operates within the -40°C to +85°C temperature range.