LM4040CIM3-8.2/NOPB

Overview

The LM4040CIM3-8.2/NOPB is a micropower shunt voltage reference from Texas Instruments, housed in a compact SOT-23 surface-mount package. It provides a fixed output voltage of 8.2V with an initial accuracy of ±0.5%. The device operates within a temperature range of -40°C to +85°C and features a low temperature coefficient of 100 ppm/°C. It supports a maximum cathode current of 15mA and requires a minimum operating current of 60µA for regulation.

Feature Summary

• Micropower operation with low quiescent current consumption suitable for battery-powered applications
• High precision performance with tight initial accuracy tolerance and low temperature drift
• Compact three-pin SOT-23 surface-mount package design for space-constrained PCB layouts

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Digital-to-analog converter (DAC) voltage references
• Portable instrumentation requiring stable voltage rails
• Battery-operated measurement systems

Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free and RoHS compliance as per Texas Instruments standards. Confirm the 'CIM3' designation corresponds to the commercial temperature grade and SOT-23 packaging. Ensure the ordering part number matches the required 8.2V output variant exactly, as other voltage options exist within the same family.

Selection Notes

Select this component when a stable 8.2V reference is needed in a small footprint. The ±0.5% accuracy suits general precision applications, while the 100 ppm/°C coefficient ensures stability across the commercial temperature range. Verify that the circuit can provide at least 60µA cathode current to maintain regulation without exceeding the 15mA maximum limit.

Part Context

This part belongs to the LM4040 series of micropower shunt voltage references. The series offers various fixed output voltages and accuracy grades. The CIM3 variant specifically denotes the commercial temperature range and SOT-23 package. The NOPB suffix typically signifies a lead-free and environmentally friendly product configuration compliant with international standards.

Replacement Considerations

Direct replacements include other LM4040 variants with compatible voltage and accuracy, such as LM4040DIM3-8.2/NOPB or LM4040BIM3-8.2/NOPB, depending on required precision. Cross-reference with LM4040-Q1 automotive-grade versions if higher reliability is needed, ensuring pinout compatibility.