LM4040A25IDBZT

Overview

The LM4040A25IDBZT is a precision shunt voltage reference manufactured by Texas Instruments, housed in a compact SOT-23-3 surface-mount package. It provides a fixed output voltage of 2.5 V with an initial accuracy of ±0.1%. The device operates within a temperature range of -40°C to +85°C and features a low temperature coefficient of 20 ppm/°C. Key electrical specifications include a maximum shunt current of 15 mA, a minimum cathode current of 80 µA, and a noise level of 35 µVrms over the 10 Hz to 10 kHz frequency band.

Feature Summary

• Delivers high-precision voltage regulation with ±0.1% initial accuracy for sensitive measurement applications.
• Exhibits excellent thermal stability through a low temperature coefficient of 20 ppm/°C.
• Maintains stable operation at very low quiescent currents starting from 80 µA.
• Offers low-noise performance suitable for precision analog signal conditioning.

Applications

• Precision data acquisition systems requiring stable reference voltages
• Battery-powered instrumentation benefiting from low current consumption
• Portable medical devices demanding high accuracy in small form factors
• Industrial control circuits utilizing shunt regulator topologies

Procurement Notes

Verify the specific suffix 'IDBZT' to confirm the tape-and-reel packaging format and ensure compatibility with automated assembly processes. Confirm that the A-grade accuracy and extended temperature range meet the design requirements. Check for RoHS compliance status as indicated in official documentation before finalizing procurement orders.

Selection Notes

Select this component when a 2.5 V reference with tight tolerance (±0.1%) and superior temperature stability (20 ppm/°C) is required. It is appropriate for designs needing low noise and minimal power draw. Ensure the application voltage exceeds the output voltage to maintain proper shunt regulation within the specified current limits.

Part Context

This part belongs to the LM4040 family of micropower shunt voltage references from Texas Instruments. The family offers various output voltages and accuracy grades. The 'A' designation indicates the highest accuracy tier, while '25' specifies the 2.5 V output. The 'DBZT' suffix denotes the SOT-23-3 package with tape-and-reel delivery.

Replacement Considerations

LM4040D25IDBZT: Lower accuracy (±1%) and higher temperature coefficient (150 ppm/°C). LM4040C25IDBZTG4: Moderate accuracy (±0.5%) and higher temperature coefficient (150 ppm/°C). Verify pinout compatibility and thermal performance when substituting.