LM4040B50IDBZRG4

Overview

The LM4040B50IDBZRG4 is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 5V with an initial accuracy of ±0.2%. The device operates within a temperature range of -40°C to +85°C and utilizes a SOT-23-3 surface-mount package. Key electrical characteristics include a maximum cathode current of 95 µA, a maximum shunt current of 15 mA, and a noise level of 80 µVrms in the 10Hz to 10kHz bandwidth.

Feature Summary

• Delivers high-precision voltage regulation with ±0.2% initial accuracy for stable reference applications.
• Features micropower consumption with a typical cathode current of 95 µA to minimize energy usage.
• Provides low-noise performance with 80 µVrms noise in the 10Hz to 10kHz frequency range.

Applications

• Portable battery-powered instrumentation requiring low quiescent current
• Data acquisition systems needing precise analog-to-digital conversion references
• Temperature sensing circuits utilizing stable voltage benchmarks

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free and RoHS compliance as per manufacturer standards. Confirm the package type matches the required SOT-23 footprint for PCB layout. Ensure the operating temperature range of -40°C to +85°C aligns with the environmental conditions of the target application. Cross-reference the datasheet for any recent product change notifications affecting pinout or specifications.

Selection Notes

Select this component when a 5V reference with tight tolerance is required alongside minimal power draw. Compare against the TL4050 series if lower temperature coefficients are necessary for higher stability. Consider the SOT-23-3 package constraints regarding thermal dissipation and board space. Verify that the 15 mA maximum shunt current meets the load requirements of the circuit design.

Part Context

This part belongs to the LM4040 family of micropower shunt voltage references from Texas Instruments. The family offers various fixed output voltages and accuracy grades. The 'B' designation typically denotes the ±0.2% accuracy grade, while '50' indicates the 5V output. The 'RG4' suffix specifies the reel packaging and lead-free composition.

Replacement Considerations

LM4040B50IDBZR is the non-green variant of the same electrical specification. LM4040C50IDBZT offers 0.5% accuracy instead of 0.2%. TL4050B50IDBZRG4 provides improved temperature coefficient performance at 50 ppm/°C compared to the LM4040's 100 ppm/°C.