REF02HSA+

Overview

The REF02HSA+ is a precision voltage reference providing a fixed +5V output in an 8-pin SOIC package. It operates with a single supply voltage ranging from 7V to 33V and draws a quiescent current of 1mA to 1.4mA. The device features a maximum temperature coefficient of 25ppm/°C and an initial accuracy of ±25mV. It includes a dedicated TEMP pin that outputs a linear voltage proportional to absolute temperature, with a scale factor of approximately 2.1mV/°C. The output can be adjusted over a ±6% range via the TRIM terminal without significantly affecting temperature stability.

Feature Summary

• Provides a stable +5V reference output suitable for high-precision analog circuits
• Includes a dedicated temperature-sensing pin for linear voltage output proportional to absolute temperature
• Features short-circuit protection for indefinite duration to ground or input voltage
• Allows output voltage adjustment over a ±6% range using the trim terminal

Applications

• Precision temperature transducers and control systems
• Analog-to-Digital Converter (ADC) reference sources
• Digital Voltmeter calibration standards
• Threshold detector circuits

Procurement Notes

Verify the specific suffix 'HSA+' against the manufacturer's ordering guide to confirm the lead-free status and SOIC package variant. Ensure the design accommodates the required input voltage range of 7V to 33V and accounts for the 1mA to 1.4mA quiescent current draw. Confirm that the application utilizes the TEMP pin correctly if temperature sensing is intended, as this pin is not present on the REF01 variant.

Selection Notes

Select the REF02HSA+ when a fixed +5V reference with integrated temperature sensing is required. The H-grade offers a 25ppm/°C temperature coefficient, which is less precise than the E-grade but more cost-effective. Consider the REF01 series if a +10V output is needed instead, noting that it lacks the temperature output pin. Verify that the 8-pin SOIC footprint fits the PCB layout constraints.

Part Context

The REF02HSA+ belongs to the industry-standard REF01/REF02 family of precision voltage references manufactured by Analog Devices Inc./Maxim Integrated. This series is designed for applications requiring stable voltage references with low noise and high accuracy. The REF02 variant specifically provides a +5V output, distinguishing it from the +10V REF01, while sharing similar electrical characteristics and package options within the product line.

Replacement Considerations

For new designs, the datasheet recommends referring to the MAX6035 or MAX6143 data sheets as modern alternatives. These newer devices may offer improved specifications such as lower noise, tighter accuracy, or different package sizes compared to the legacy REF02 series.