LM4040D20QDBZTG4

Overview

The LM4040D20QDBZTG4 is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 2.048V 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 150ppm/°C. It supports a maximum cathode current of 80µA and delivers up to 15mA output current. The component is housed in a SOT-23-3 surface-mount package and exhibits low noise characteristics, specified at 35µVrms between 10Hz and 10kHz.

Feature Summary

• Provides stable precision voltage reference performance suitable for sensitive analog circuits
• Operates effectively across extended industrial temperature ranges for robust reliability
• Features low power consumption characteristics ideal for battery-powered applications

Applications

• Portable instrumentation requiring precise voltage regulation
• Battery-powered measurement devices needing stable reference sources
• Data acquisition systems utilizing analog-to-digital conversion
• Industrial process control equipment requiring accurate signal conditioning

Procurement Notes

Verify the complete part number including the QDBZT suffix to ensure correct qualification grade and packaging configuration. Confirm RoHS compliance status matches project requirements. Check manufacturer documentation for any recent product change notices affecting marking or assembly specifications before finalizing procurement orders.

Selection Notes

Select this component when a 2.048V reference with ±1% accuracy is required in a compact SOT-23-3 package. Ensure the application current does not exceed the 15mA limit. Consider the 150ppm/°C temperature coefficient for thermal stability needs. Verify that the operating temperature range meets the specific environmental conditions of the target system 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 D series denotes ±1% initial accuracy. The Q designation indicates automotive or qualified reliability standards. The DBZT suffix specifies the SOT-23-3 package and tape-and-reel shipping format.

Replacement Considerations

LM4040D20IDBZT is a non-qualified alternative with identical electrical specifications but different reliability grading. LM4040D20IDBZR offers the same performance in a reel package without the Q qualification. Verify pinout compatibility and thermal characteristics when substituting.