LM4040DECT-3.0

Overview

The LM4040DECT-3.0 is a precision micropower shunt voltage reference manufactured by STMicroelectronics, providing a fixed 3.0 V output with ±1.0% initial accuracy at 25 °C. It operates within an industrial temperature range of -40 °C to +125 °C and features a maximum temperature coefficient of 70 ppm/°C. The device requires a minimum operating current of 10 µA and supports a reverse breakdown current up to 20 mA. It is housed in a compact SOT323-5L surface-mount package.

Feature Summary

• Ultra low operating current of 10 µA at 25 °C for power restricted designs
• Very low low-frequency noise typical value of 10 µVp-p
• Stable operation when used with capacitive loads
• Available in space-saving SOT323-5L packages

Applications

• Portable battery-operated equipment
• Data acquisition systems
• Instrumentation

Procurement Notes

Verify the specific ordering suffix 'ECT' corresponds to the SOT323-5L package and tape-and-reel delivery format as defined in the manufacturer's official ordering information table. Confirm that the 'D' designation aligns with the required ±1.0% initial accuracy specification for the target application environment.

Selection Notes

Select this component for applications requiring a stable 3.0 V reference with minimal quiescent current consumption. Ensure the design accommodates the specified 10 µA minimum operating current for proper regulation. Consider the SOT323-5L footprint constraints and verify thermal dissipation requirements against the junction-to-ambient thermal resistance data provided in the datasheet.

Part Context

This part belongs to the LM4040 family of high-accuracy shunt voltage references from STMicroelectronics. The series offers multiple fixed output voltages including 2.048 V, 2.5 V, 3.0 V, 4.096 V, and 5.0 V. Variants are available with different accuracy grades ranging from 0.1% to 1%, packaged in either SOT23-3L or SOT323-5L formats to suit various board space limitations.

Replacement Considerations

Public confirmed substitute part numbers are not identified in the provided documentation.