AD589KH

Voltage Reference Overview

The AD589KH is a two-terminal, temperature-compensated band gap voltage reference providing a fixed 1.23 V output. It operates within an input current range of 50 µA to 5 mA and features a maximum temperature coefficient of 50 ppm/°C over the 0°C to +70°C operating range. The device exhibits a dynamic output impedance of 0.6 Ω typical and RMS noise voltage of 5 µV in the 10 Hz to 10 kHz bandwidth. It requires no frequency compensation and is housed in a hermetic metal can (H-02) package.

Voltage Reference Feature Summary

• Two-terminal shunt regulator design eliminates need for external components
• Low power operation suitable for battery-powered applications
• High stability derived from precision bipolar processing and thin-film technology

Voltage Reference Applications

• Reference for CMOS analog-to-digital converters
• Negative reference supply for CMOS multiplying DACs
• Battery-operated portable equipment

Voltage Reference Procurement Notes

Verify the specific suffix KH indicates the 50 ppm/°C temperature coefficient grade and metal can packaging. Confirm the operating temperature range matches the 0°C to +70°C specification. Ensure ESD precautions are observed during handling due to electrostatic sensitivity. Check for MIL-STD-883 compliance requirements if applicable to the end application.

Voltage Reference Selection Notes

Select the AD589KH when a stable 1.23 V reference with low temperature drift is required in a two-terminal form factor. It serves as a direct replacement for other 1.2 V references with superior thermal performance. Consider this component for designs needing low quiescent current and minimal external circuitry complexity.

Voltage Reference Part Context

The AD589 series includes multiple grades differentiated by temperature coefficient and operating range. The KH variant specifically offers a 50 ppm/°C coefficient, positioned between the JH (100 ppm/°C) and MH (10 ppm/°C) grades. All variants share the same fundamental band gap architecture and package options.

Voltage Reference Replacement Considerations

The datasheet identifies the AD589 as a superior replacement for other generic 1.2 V references. No specific substitute part numbers are listed in the provided documentation.