LM4040AIM3-3.0

Overview

The LM4040AIM3-3.0 is a precision micropower shunt voltage reference manufactured by Texas Instruments, designed for applications requiring stable and accurate voltage regulation in compact form factors. This component provides a fixed output voltage of 3.0 V with an initial accuracy of ±0.1%, ensuring high precision across varying conditions. It operates within a temperature range of -40°C to +85°C and features a low temperature coefficient of 100 ppm/°C. The device draws a typical cathode current of 67 µA and supports a maximum shunt current of 15 mA. Packaged in a surface-mount SOT-23-3 case, it integrates internal compensation to eliminate the need for external capacitors, simplifying circuit design while maintaining low noise performance.

Feature Summary

• Delivers fixed 3.0 V output with ±0.1% initial accuracy for high-precision analog circuits
• Operates with ultra-low quiescent current of 67 µA to extend battery life in portable devices
• Features internal frequency compensation, allowing stable operation without external output capacitors
• Provides robust thermal stability with a temperature coefficient of 100 ppm/°C over industrial temperatures

Applications

• Portable instrumentation and handheld measurement devices
• Battery-powered data acquisition systems
• Precision analog-to-digital converter (ADC) reference sources
• Microcontroller power supply monitoring circuits

Procurement Notes

Verify the specific suffix and package variant when sourcing, as availability may vary between tape-and-reel and cut-tape formats. Confirm RoHS compliance status for your region, as manufacturing sites and material declarations can change. Ensure the supplier provides traceable documentation matching the Texas Instruments part number to avoid counterfeit components. Check for any recent product change notices regarding packaging or testing procedures before finalizing procurement orders.

Selection Notes

Select this component when a fixed 3.0 V reference with tight tolerance is required in space-constrained designs. The SOT-23-3 package offers a small footprint suitable for dense PCB layouts. Consider the 67 µA operating current for battery-sensitive applications where minimizing standby drain is critical. Ensure the load current does not exceed the 15 mA maximum shunt limit to maintain regulation accuracy and prevent thermal issues.

Part Context

This device belongs to the LM4040-N series of micropower shunt voltage references from Texas Instruments. The series is characterized by its ability to provide precise voltage references in small packages without requiring external stabilization components. It serves as a drop-in replacement for larger, less efficient reference solutions in modern electronic designs focusing on miniaturization and power efficiency.

Replacement Considerations

LM4040BIM3-3.0/NOPB: Offers similar functionality with ±0.2% accuracy instead of ±0.1%. LM4040DIM3-3.0/NOPB: Provides ±1% accuracy at a potentially lower cost point. Verify pinout compatibility and thermal characteristics when substituting.