LM4040A25IDBZR

Overview

The LM4040A25IDBZR is a precision micropower shunt voltage reference manufactured by Texas Instruments. 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. It is housed in a surface-mount SOT-23-3 package. The maximum cathode current is 15 mA, while the minimum operating current is approximately 74 µA. The load regulation is specified at 6 mV.

Feature Summary

• Provides high-precision fixed voltage reference with ±0.1% initial accuracy
• Features ultra-low temperature coefficient of 20 ppm/°C for thermal stability
• Designed as a micropower shunt reference with minimal quiescent current consumption
• Utilizes compact SOT-23-3 surface-mount packaging for space-constrained applications

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Data acquisition systems requiring stable voltage references
• Portable instrumentation powered by battery supplies
• Calibration equipment needing high accuracy voltage standards

Procurement Notes

Verify the specific suffix 'A' indicates the ±0.1% accuracy grade and 20 ppm/°C temperature coefficient, distinct from lower accuracy variants like 'B' or 'C'. Confirm the 'DBZR' suffix corresponds to the SOT-23-3 surface-mount package and reel packaging format. Ensure the operating temperature range requirement aligns with the -40°C to +85°C specification. Check RoHS compliance status if required for your manufacturing process.

Selection Notes

Select this component when a 2.5 V reference with tight tolerance (±0.1%) and excellent thermal stability (20 ppm/°C) is required. It is suitable for applications where power consumption must be minimized but precision cannot be compromised. Compare against higher accuracy series references if tighter tolerances are needed, or lower cost variants if ±0.5% accuracy suffices. Ensure the SOT-23-3 footprint matches the PCB design constraints.

Part Context

The LM4040A25IDBZR belongs to the LM4040 family of micropower shunt voltage references from Texas Instruments. This series offers various fixed output voltages and accuracy grades. The 'A' designation specifically denotes the highest precision tier within the standard LM4040 lineup, characterized by superior initial accuracy and lower temperature drift compared to 'B' or 'C' graded devices. It serves as a reliable reference element in mixed-signal circuits.

Replacement Considerations

LM4040A25IDBZT: Same electrical specifications and accuracy, differing only in tape-and-reel packaging format instead of cut tape. LM4040A25IDBZRG4: Identical performance parameters, representing a lead-free/RoHS-compliant version of the same device. Verify pinout compatibility and thermal characteristics when substituting.