LM4041B12IDBZT

Overview

The LM4041B12IDBZT is a precision micro-power shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 1.23V with an initial accuracy tolerance of ±0.2%. The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 100ppm/°C. It supports a cathode current range from 80µA to 12mA and exhibits a typical output noise of 20µVRMS between 10Hz and 10kHz. The component is housed in a surface-mount SOT-23-3 package.

Feature Summary

• Provides stable reference voltage without requiring external stabilizing capacitors, ensuring compatibility with any capacitive load.
• Utilizes fuse and Zener-zap reverse breakdown voltage trimming during wafer sort to achieve high initial accuracy grades.
• Features low dynamic impedance and bandgap reference temperature drift curvature correction for consistent performance across varying currents and temperatures.

Applications

• Portable battery-powered equipment requiring low quiescent current
• Handheld meters and data acquisition systems
• Battery chargers and power management circuits

Procurement Notes

Verify the specific suffix IDBZT corresponds to the SOT-23-3 package and tape-and-reel configuration. Confirm the B grade designation matches the required ±0.2% accuracy specification. Ensure the industrial temperature range (-40°C to +85°C) aligns with the application environment. Check RoHS compliance status as per the latest manufacturer documentation.

Selection Notes

Select this component when a fixed 1.23V reference is needed with tighter tolerance than standard C-grade devices. The B grade offers ±0.2% accuracy compared to the ±0.5% of C-grade variants. Consider the SOT-23-3 footprint for space-constrained designs. Verify that the minimum operating current of 80µA meets the circuit bias requirements.

Part Context

This part belongs to the LM4041 family of precision shunt voltage references. The family includes adjustable versions and various accuracy grades (A, B, C, D). The LM4041 series is designed for applications demanding stability and low power consumption in compact surface-mount packages.

Replacement Considerations

LM4041C12IDBZT: Offers similar functionality but with ±0.5% accuracy instead of ±0.2%. LM4041A12IDBZT: Provides higher precision at ±0.1% accuracy. LM4040 series: Alternative shunt reference with different voltage options and temperature ranges.