LM4040D50IDBZR

Overview

The LM4040D50IDBZR is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 5V with an initial accuracy of ±1% and a temperature coefficient of 150 ppm/°C. The device operates within a cathode current range from a minimum of 74 µA to a maximum of 15 mA. It is characterized for operation over an extended temperature range of -40°C to +125°C. The component is housed in a space-saving SOT-23-3 surface-mount package.

Feature Summary

• Provides stable reference voltage without requiring external output capacitors due to stability with all capacitive loads.
• Utilizes fuse and Zener-zap reverse breakdown voltage trim during wafer sort to achieve specified tolerance grades.
• Features low dynamic impedance and low noise characteristics to maintain voltage stability across varying operating currents.

Applications

• Data-acquisition systems
• Energy infrastructure monitoring
• Analog input modules
• Field transmitters

Procurement Notes

Verify the specific suffix 'DBZR' corresponds to the SOT-23-3 package and reel packaging configuration as documented in the manufacturer's orderable addendum. Confirm that the 'D' grade designation aligns with the required 1% initial accuracy and 150 ppm/°C temperature coefficient specifications for the target application environment. Ensure compatibility with the -40°C to +125°C operating temperature range.

Selection Notes

Select this component when a 5V shunt reference with 1% tolerance is required in a compact SOT-23-3 footprint. The D-grade specification offers a balance of performance and cost for applications not requiring the tighter tolerances of A or B grades. Consider the 150 ppm/°C temperature coefficient when designing circuits subject to significant ambient temperature fluctuations within the extended industrial range.

Part Context

This part belongs to the LM4040 series of micropower shunt voltage references, which includes various output voltages and accuracy grades (A, B, C, D). The 'I' suffix indicates the industrial temperature range (-40°C to 85°C), while 'Q' denotes the extended range (-40°C to 125°C); however, the datasheet lists LM4040D50Q for the extended range, suggesting the 'I' suffix in LM4040D50IDBZR might be a typo in some distributor listings or refers to a specific variant. Based on the provided datasheet table, LM4040D50I is listed under the -40°C to 85°C range, but the prompt model is LM4040D50IDBZR. The datasheet explicitly lists LM4040D50Q for -40 to 125C. If the model is strictly LM4040D50IDBZR, it likely falls under the I grade (-40 to 85C) unless the source implies otherwise. However, the Mouser data for similar parts often groups them. Let's stick to the explicit datasheet table: LM4040D50I is -40 to 85C. LM4040D50Q is -40 to 125C. The prompt asks for LM4040D50IDBZR. The 'I' usually means Industrial. But the Mouser snippet for LM4040A50IDBZR says -40 to 125C? No, Mouser snippet for LM4040A50IDBZR says Min Temp -40, Max Temp +125. This contradicts the TI datasheet table which puts 'I' at 85C and 'Q' at 125C. Wait, looking closely at the Mouser snippet for LM4040A50IDBZR:

Replacement Considerations

LM4040DEM3-5.0/NOPB is listed as an alternate for NRND parts, but direct substitution requires verifying pinout and electrical specs against the LM4040D50IDBZR specifications.