LM4041CIMADJ

Voltage Reference Overview

The LM4041CIMADJ is a precision micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It utilizes a bandgap circuit architecture to provide an adjustable output voltage ranging from 1.225 V to 10 V via an external resistor divider. The device operates within a current range of 60 µA to 12 mA, maintaining excellent stability and low dynamic impedance. It features a typical temperature coefficient of 20 ppm/°C and is available in SOT-23 and SC-70-5 surface-mount packages suitable for space-constrained designs.

Voltage Reference Feature Summary

• Adjustable output voltage capability spanning from 1.225 V up to 10 V using external resistors
• High tolerance for capacitive loads ensuring stable operation without oscillation
• Micropower consumption with a wide operating current range supporting low-power applications

Voltage Reference Applications

• Portable battery-powered instrumentation requiring precise voltage regulation
• Data acquisition systems needing stable reference voltages for analog-to-digital conversion
• Microprocessor supply monitoring circuits for threshold detection

Voltage Reference Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor was acquired by Texas Instruments. Ensure the specific suffix matches the required package type and temperature grade. Confirm that the adjustable variant is selected rather than fixed-voltage versions. Check for original equipment manufacturer documentation to validate authenticity and traceability before procurement.

Voltage Reference Selection Notes

Select this component when an adjustable reference voltage between 1.225 V and 10 V is required in a small footprint. Consider the 60 µA minimum operating current to ensure proper regulation under light load conditions. Evaluate the need for external compensation if driving large capacitive loads, although the device is designed for high capacitive tolerance. Compare against fixed-output variants if the application voltage does not require adjustment.

Voltage Reference Part Context

The LM4041 series serves as a precision micropower shunt voltage reference, offering an alternative to traditional Zener diodes with superior temperature stability and lower noise. The CIMADJ designation indicates the adjustable output version within the industrial temperature grade family. This component is part of a broader lineup including fixed-output variants like the 1.225 V and 2.5 V versions, all sharing similar pinouts and performance characteristics.

Voltage Reference Replacement Considerations

LM4041AIMADJ/NOPB

Voltage Reference FAQ

What is the minimum operating current required for the LM4041CIMADJ?

The device requires a minimum cathode current of 60 µA to maintain regulation and stable output voltage.

How is the output voltage adjusted on the LM4041CIMADJ?

The output voltage is set between 1.225 V and 10 V using an external resistor divider network connected to the reference input pin.