LM329BZ#PBF

Overview

The LM329BZ#PBF is a temperature-compensated 6.9V Zener voltage reference in a 3-lead plastic TO-92 package. It provides excellent stability over time and temperature with very low dynamic impedance and wide operating current range from 0.6mA to 15mA. The device achieves low noise using a buried Zener design. Key electrical specifications include a guaranteed maximum temperature coefficient of 15ppm/°C, a maximum dynamic impedance of 1Ω at 1mA, and a maximum wideband noise of 20µV RMS (10Hz to 10kHz). The reverse-breakdown voltage ranges from 6.7V to 7.2V at 25°C.

Feature Summary

• Temperature compensated 6.9V Zener reference providing excellent long-term and thermal stability
• Low dynamic impedance achieved via high gain shunt regulator architecture around the Zener
• Buried Zener design eliminates surface noise for superior noise performance
• Wide operating current range supporting diverse application requirements

Applications

• Transducers
• A/D and D/A Converters
• Calibration Standards
• Instrumentation Reference

Procurement Notes

Verify the specific suffix BZ corresponds to the 3-lead plastic TO-92 package configuration. Confirm the lead-free finish designation #PBF matches project environmental compliance requirements. Ensure the component meets the specified 0°C to 70°C operating temperature range for the intended environment. Cross-reference the manufacturer's ordering information to validate availability and packaging details before procurement.

Selection Notes

Select this part when a stable 6.9V reference is required with strict limits on temperature drift and dynamic impedance. The TO-92 package suits through-hole designs with space constraints. Consider the 15ppm/°C temperature coefficient grade for applications needing tighter thermal stability than standard grades. Verify that the 0.6mA to 15mA operating current range aligns with the circuit's power budget and load conditions.

Part Context

The LM329 series includes multiple temperature coefficient grades (A, B, C, D) and package options (TO-46 metal can and TO-92 plastic). The LM329BZ variant specifically denotes the B-grade temperature coefficient version in the TO-92 package. This family serves as a precision shunt reference, distinct from series regulators, offering high accuracy for calibration and measurement systems.

Replacement Considerations

LM329AZ#PBF, LM329CZ#PBF, LM329DZ#PBF