LM4040C82ILP

Overview

The LM4040C82ILP is a micropower shunt voltage reference from Texas Instruments, providing a fixed output of 8.192 V. It belongs to the C grade, offering an initial accuracy of ±0.5% and a temperature coefficient of 100 ppm/°C. The device operates within a cathode current range of 45 μA to 15 mA and functions across an ambient temperature range of –40°C to +85°C. Packaged in a TO-92-3 through-hole format, it requires no external capacitors for stability.

Feature Summary

• Provides a stable 8.192 V reference with low dynamic impedance and noise
• Operates without external output capacitors while remaining stable with all capacitive loads
• Maintains precision over wide operating currents and temperatures using Zener-zap reverse breakdown voltage trim

Applications

• Data-acquisition systems
• Energy infrastructure monitoring
• Analog input modules
• Field transmitters
• Precision audio circuits

Procurement Notes

Verify the specific suffix 'LP' corresponds to the TO-92 package configuration during procurement. Confirm that the C grade specifications meet the required tolerance levels for the application. Ensure the ordering part number matches the exact voltage and package requirements to avoid substitution errors.

Selection Notes

Select this component when a fixed 8.192 V reference is needed in a through-hole package. The C grade offers a balance of cost and performance with 0.5% accuracy. Consider the extended temperature range if operation beyond 85°C is required, as indicated by the Q suffix variants.

Part Context

This component is part of the LM4040 series of shunt voltage references designed for versatile applications. The series includes multiple grades (A, B, C, D) and various fixed output voltages. The LM4040C82ILP specifically targets industrial environments requiring reliable voltage referencing in standard through-hole layouts.

FAQ

Does the LM4040C82ILP require an output capacitor?

No, the device is stable with all capacitive loads and does not require an external output capacitor for operation.

What is the minimum cathode current for operation?

The typical minimum cathode current is 45 μA at 25°C, ensuring efficient operation in micropower applications.