LM4040D20IDBZT

Overview

The LM4040D20IDBZT is a fixed shunt voltage reference integrated circuit manufactured by Texas Instruments. It provides a nominal 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 supports a maximum cathode current of 15 mA and requires a minimum operating current of 80 µA. The component is housed in a surface-mount SOT-23-3 package.

Feature Summary

• Provides stable fixed reference voltage for precision analog circuits
• Operates across extended industrial temperature ranges
• Compact surface-mount design for space-constrained applications

Applications

• Analog-to-digital converter (ADC) reference inputs
• Digital-to-analog converter (DAC) voltage references
• Battery-powered measurement instrumentation
• Portable electronic devices requiring precise voltage regulation

Procurement Notes

Verify the specific suffix 'D' indicates the ±1% accuracy grade and '20' denotes the 2.048V output during procurement. Confirm the 'DBZT' suffix corresponds to the SOT-23-3 package and tape-and-reel shipping format. Ensure compatibility with RoHS3 compliance requirements if mandated by the target assembly process. Cross-reference the manufacturer part number against authorized distributor listings to confirm authenticity and current production status.

Selection Notes

Select this component when a 2.048V reference with ±1% initial accuracy is required. It is suitable for applications needing operation up to 125°C junction temperature. Consider the 15mA maximum current capability for load driving needs. Evaluate the 150 ppm/°C temperature coefficient against system drift requirements. Compare noise specifications if low-noise performance is critical for the signal chain.

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 LM4040 family is designed for general-purpose voltage referencing in portable and industrial equipment. It serves as a compact alternative to larger through-hole reference components.

Replacement Considerations

LM4040D20IDBZRG4 is a lead-free variant of the same electrical specification. LM4040D20IDBZR is the non-automotive grade version in the same package. Verify pinout compatibility before substituting with other shunt reference families.