LM369N

Overview

The LM369N is a precision shunt voltage reference IC manufactured by National Semiconductor. It utilizes buried Zener technology to deliver a fixed output voltage of 10V. The device supports a maximum load current of 50 mA and operates within a supply voltage range up to 35 V. Power dissipation is rated at 600 mW. It is housed in an 8-pin DIP package with a width of 0.300 inches (7.62 mm). The component is RoHS compliant and designed for through-hole mounting.

Feature Summary

• Buried Zener architecture ensures high stability and low noise performance
• Fixed 10V output voltage eliminates need for external trimming
• High impedance input allows direct interfacing with sensitive circuits

Applications

• Precision analog-to-digital converter references
• Battery-powered instrumentation voltage standards
• Calibration equipment reference sources

Procurement Notes

Verify the manufacturer marking matches National Semiconductor or Texas Instruments branding, as TI acquired NS. Confirm the suffix 'N' indicates the standard 8-DIP package variant. Check RoHS compliance status if environmental regulations apply to your assembly process. Ensure the supplier provides traceable documentation for critical calibration applications.

Selection Notes

Select this part when a stable 10V reference is required in a through-hole design. Compare initial accuracy and temperature coefficient specifications against other series references if tighter tolerances are needed. Consider thermal management requirements given the 600 mW power rating during operation.

Part Context

The LM369 belongs to a family of precision voltage references from National Semiconductor. It serves as a stable benchmark for analog signal processing chains. The buried Zener construction distinguishes it from bandgap references, offering superior long-term drift characteristics for high-precision measurement systems.

Replacement Considerations

Check for LM369 variants with different packages or temperature grades. Verify pin compatibility before substituting with equivalent parts from other manufacturers. Ensure replacement devices meet the same 10V output and 50 mA current specifications.