LM4041A12IDBZRG4

Overview

The LM4041A12IDBZRG4 is a precision shunt voltage reference from Texas Instruments, featuring a fixed output of 1.225V with an initial accuracy of ±0.1%. It operates within a temperature range of -40°C to +85°C and exhibits a maximum temperature coefficient of 100ppm/°C. The device supports a cathode current range from 45µA to 12mA and delivers low output noise of 20µVRMS. Packaged in a surface-mount SOT-23-3 format, it ensures stability across all capacitive loads without requiring external compensation components.

Feature Summary

• Provides high-precision fixed voltage reference with tight initial accuracy tolerance
• Maintains stable operation across wide capacitive loads without external capacitors
• Features low dynamic impedance and minimal output noise for sensitive applications

Applications

• Data acquisition systems
• Portable battery-powered equipment
• Precision audio circuits
• Process control instrumentation

Procurement Notes

Verify the G4 suffix indicates lead-free compliance and RoHS standards. Confirm the DBZR package designation corresponds to tape and reel packaging for automated assembly. Ensure the A grade specification matches the required 0.1% accuracy and 100ppm/°C temperature coefficient for the specific design constraints.

Selection Notes

Select this component when a fixed 1.225V reference is required with stringent accuracy needs. The A grade offers superior performance compared to B, C, or D grades. Consider the SOT-23-3 footprint for space-constrained designs. Verify that the 12mA maximum cathode current suffices for the load requirements.

Part Context

This part belongs to the LM4041 series of micropower shunt voltage references. It utilizes Zener-zap trimming technology on the wafer level to achieve precise voltage tolerances. The series includes both fixed and adjustable variants, with the LM4041A12IDBZRG4 representing the fixed 1.225V option in the highest accuracy grade available.

Replacement Considerations

LM4041A12IDBZR is the non-G4 equivalent version. LM4041D12IDBZR offers lower accuracy (1%) but shares the same package and pinout.