LM4040D20IDBZRG4

Voltage Reference Overview

The LM4040D20IDBZRG4 is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 2.048 V with an initial accuracy of ±1%. The device operates within a temperature range of -40°C to +85°C and features a temperature coefficient of 150 ppm/°C. It utilizes a SOT-23 surface-mount package and draws a typical cathode current of 73 µA, supporting a maximum shunt current of 15 mA.

Voltage Reference Feature Summary

• Provides stable fixed voltage reference for precision applications
• Operates at micropower levels suitable for battery-powered systems
• Compact three-terminal surface-mount design

Voltage Reference Applications

• Portable instrumentation circuits
• Battery-powered measurement devices
• Data acquisition systems requiring stable references

Voltage Reference Procurement Notes

Verify the specific suffix 'G4' indicates lead-free and RoHS compliance status as per manufacturer documentation. Confirm the operating temperature range matches the application requirements, as this variant is rated for industrial temperatures (-40°C to +85°C). Ensure the SOT-23 footprint aligns with the PCB layout specifications before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component when a 2.048 V reference with ±1% accuracy is required in a compact form factor. It is suitable for designs prioritizing low quiescent current consumption. Compare against higher accuracy grades if tighter tolerance is needed, or consider wider temperature variants if operation exceeds 85°C. Verify that the 15 mA maximum shunt current meets the load requirements.

Voltage Reference 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 in small packages. The 'D' designation typically denotes ±1% initial accuracy, while '20' indicates the 2.048 V output level. The 'RG4' suffix specifies reel packaging and environmental compliance.

Voltage Reference Replacement Considerations

LM4040D20IDBZR is the non-reel equivalent. LM4040B20IDBZRG4 offers higher accuracy (±0.1%). LM4040C20IDBZRG4 provides ±0.5% accuracy. Check datasheets for pinout compatibility and thermal performance differences.