LT1009CZ#PBF

Voltage Reference Overview

The LT1009CZ#PBF is a precision trimmed 2.5V shunt regulator diode manufactured by Analog Devices Inc. It features a maximum initial tolerance of 0.2% and a temperature coefficient of 25 ppm/°C within the 0°C to 70°C operating range. The device offers a maximum dynamic impedance of 0.6Ω and supports a wide operating current range from 400μA to 10mA. It utilizes a 3-lead plastic TO-92 package with an output, ground, and adjustable terminal.

Voltage Reference Feature Summary

• Precision on-chip trimming minimizes initial voltage tolerance and temperature drift without requiring external adjustments.
• Third terminal allows reference voltage adjustment of ±5% to calibrate out system errors.
• Low dynamic impedance enhances versatility across a wide operating current range.

Voltage Reference Applications

• Reference for 5V Systems
• 8-Bit A/D and D/A Reference
• Digital Voltmeters
• Current Loop Measurement and Control Systems
• Power Supply Monitor

Voltage Reference Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and lead-free finish specifications against the latest datasheet revisions. Ensure the ordering suffix matches the required package style and temperature grade. Request material declarations and test reports if specific quality standards are mandated for the application.

Voltage Reference Selection Notes

Select this component when a low-drift 2.5V reference is required in a through-hole TO-92 package. It serves as a direct pin-to-pin replacement for the LM136, eliminating the need for external trim networks in many designs. Consider the LT1019 if lower drift performance is necessary. Verify that the operating temperature range aligns with the C-grade specification of 0°C to 70°C.

Voltage Reference Part Context

The LT1009 series includes variants in TO-46 metal can, MSOP-8, SO-8, and TO-92 packages. The LT1009CZ#PBF specifically denotes the commercial grade version in the 3-lead plastic TO-92 package. Other grades include the I-grade for extended temperature ranges and the obsolete MH-grade for military specifications. The series is designed for high accuracy applications requiring stable voltage references.

Voltage Reference Replacement Considerations

The LT1009 is directly interchangeable with the LM136 in many applications, allowing for improved performance without changing the external trim network. Designers should verify pin compatibility and thermal characteristics when substituting components from different manufacturers.

Voltage Reference FAQ

Can the LT1009CZ#PBF be used as a drop-in replacement for the LM136?

Yes, in many applications, the LT1009 can be used as a pin-to-pin replacement of the LM136, and the external trim network can be eliminated.

What is the purpose of the third terminal on the LT1009?

The third terminal (ADJ) allows the reference voltage to be adjusted ±5% to calibrate out system errors, although no adjustments are needed for minimum temperature coefficient.