LM4040D20QDBZR

Overview

The LM4040D20QDBZR 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 tolerance of ±1%. The device operates within a temperature range of -40°C to +125°C and features a temperature coefficient of 150 ppm/°C. It is housed in a SOT-23-3 surface-mount package. The component supports a cathode current range from 75 µA to 15 mA, ensuring stable regulation across varying load conditions.

Feature Summary

• Provides a fixed 2.048 V reference output for precision applications
• Operates over an extended industrial temperature range up to 125°C
• Designed for low power consumption suitable for battery-powered systems

Applications

• Portable instrumentation requiring precise voltage references
• Battery-operated measurement devices
• Data acquisition systems needing stable analog references

Procurement Notes

Verify the specific suffix QDBZR against official datasheets to confirm automotive qualification status and tape-and-reel packaging specifications. Ensure compatibility with existing PCB footprints for the SOT-23-3 package. Cross-reference part numbers with manufacturer documentation to distinguish between standard and qualified variants before procurement.

Selection Notes

Select this component when a fixed 2.048 V reference with ±1% accuracy is required in a compact SOT-23-3 package. Consider the 150 ppm/°C temperature coefficient for thermal stability requirements. Verify that the operating current range of 75 µA to 15 mA aligns with the circuit's power budget and load demands.

Part Context

This part belongs to the LM4040 series of micropower shunt voltage references from Texas Instruments. The series offers various fixed voltage options and accuracy grades. The 'D' indicates ±1% initial accuracy, while '20' denotes the 2.048 V output voltage. The 'Q' suffix typically signifies automotive qualification, subject to verification in the official product documentation.

Replacement Considerations

LM4040D20IDBZT is a non-automotive grade equivalent with identical electrical specifications and pinout.