LM4040CELT-4.1

Overview

The LM4040CELT-4.1 is a precision micropower shunt voltage reference manufactured by STMicroelectronics, providing a fixed output voltage of 4.096 V. It features an initial accuracy of ±0.5% at 25 °C and operates within an industrial temperature range of -40 °C to +125 °C. The device exhibits a maximum temperature coefficient of 70 ppm/°C and ultra-low operating current of 10 µA at 25 °C. Packaged in SOT23-3L, it maintains stability with capacitive loads and offers low low-frequency noise.

Feature Summary

• Ultra-low operating current of 10 µA at 25 °C for power-restricted designs
• High precision with ±0.5% initial accuracy at 25 °C
• Stable operation when used with capacitive loads
• Low low-frequency noise typical value of 10 µVp-p

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type, precision grade, and output voltage. Ensure compatibility with industrial temperature requirements ranging from -40 °C to +125 °C. Confirm that the selected component matches the required initial accuracy and thermal characteristics for the intended application environment.

Selection Notes

Select this component for applications requiring a stable shunt reference with minimal power consumption. The SOT23-3L package suits space-constrained designs. Consider the ±0.5% accuracy and 70 ppm/°C temperature coefficient for precision requirements. Verify load conditions to ensure stability with capacitive loads as specified in the datasheet.

Part Context

The LM4040 series comprises low-power, high-accuracy shunt voltage references available in multiple fixed output voltages and precision grades. The LM4040CELT-4.1 specifically denotes the 4.096 V output version with ±0.5% accuracy in an SOT23-3L surface-mount package. This series is designed for industrial temperature ranges and offers stability across various operating conditions.

Replacement Considerations

Cross-reference with other manufacturers' shunt voltage references offering similar 4.096 V output, ±0.5% accuracy, and SOT23-3L packaging. Verify electrical parameters including temperature coefficient and operating current to ensure functional equivalence in the target circuit design.

FAQ

What is the minimum operating current for the LM4040CELT-4.1?

The minimum operating current (Ikmin) is 10 µA at 25 °C for output voltages less than or equal to 3.0 V, and increases to 25 µA over the full temperature range.

Is the LM4040CELT-4.1 stable with capacitive loads?

Yes, the LM4040 is designed to be stable when used with capacitive loads, making it suitable for a broad range of application conditions.