LH0070-1H

Overview

The LH0070-1H is a precision series voltage reference IC manufactured by Analog Devices Inc. It provides a fixed output voltage of 10V with an accuracy of ±0.1% at 25°C and ±0.3% across the operating temperature range of -55°C to 125°C. The device operates within an input voltage range of 11.4V to 40V, drawing a quiescent current of up to 5mA. It features ultralow drift with a maximum slope of 5ppm/°C and very low noise of 6µVp-p in the 0.1Hz to 10Hz band. The unit is housed in a TO-39 metal can package.

Feature Summary

• Utilizes buried Zener diode structure for superior stability and noise performance
• Capable of sourcing and sinking up to 10mA in series mode operation
• Functions as a shunt regulator or three-terminal reference
• Offers high ripple rejection and immunity to input voltage variations

Applications

• A-to-D and D-to-A converters
• Precision regulators
• Digital voltmeters
• Inertial navigation systems
• Portable reference standards

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm the specific suffix matches required accuracy grades. Check datasheet revisions for updated electrical characteristics. Ensure proper handling for the metal can package. Validate compatibility with existing circuit designs before integration.

Selection Notes

Select this part for applications requiring high precision and low drift without active heating. Compare specifications against LT1031 variants for equivalent performance. Consider thermal regulation effects in high-power environments. Evaluate load regulation requirements for both sourcing and sinking currents. Verify package compatibility for through-hole mounting.

Part Context

The LH0070 series represents a legacy precision reference design now integrated into Analog Devices' portfolio. It serves as a direct replacement for older National Semiconductor parts. The technology relies on subsurface Zener structures rather than band-gap references. This design choice enables lower noise and better long-term stability. It remains relevant for high-accuracy instrumentation where thermal drift must be minimized.

Replacement Considerations

LT1031BMH and LT1031DMH are pin-compatible replacements offering improved electrical and thermal performance. These alternatives provide similar form factors while enhancing stability metrics.