LM4041EIM7X-1.2

Voltage Reference Overview

The LM4041EIM7X-1.2 is a precision micropower shunt voltage reference manufactured by Texas Instruments, featuring a fixed output of 1.225 V. It operates within an extended industrial temperature range of -40°C to +125°C and utilizes a SC-70-5 surface-mount package. The device offers an initial accuracy of ±1% and a maximum temperature coefficient of 150 ppm/°C. It supports a wide operating current range from a typical minimum of 45 µA up to a maximum shunt current of 12 mA. Designed for stability with any capacitive load without requiring external output capacitors, it provides low dynamic impedance and low noise performance suitable for portable applications.

Voltage Reference Feature Summary

• Provides stable voltage reference operation across a wide current range without requiring external output capacitors
• Features low dynamic impedance and low noise characteristics for signal integrity
• Utilizes Zener-zap reverse breakdown voltage trimming for precise initial accuracy
• Designed for space-constrained portable applications using compact SC-70 packaging

Voltage Reference Applications

• Data acquisition systems
• Battery-powered equipment
• Portable instrumentation
• Power supply monitoring

Voltage Reference Procurement Notes

Verify the specific suffix 'E' indicates the ±1% accuracy grade and 'IM7X' denotes the SC-70-5 tape-and-reel packaging configuration. Confirm the 'NOPB' designation if RoHS compliance is required, as this may appear in the full ordering part number. Ensure the application circuit respects the maximum shunt current limit of 12 mA to prevent device damage. Cross-reference the manufacturer's latest datasheet for any updates on recommended operating conditions or thermal derating guidelines.

Voltage Reference Selection Notes

Select this component when a fixed 1.225 V reference is required in a small SC-70-5 footprint. It is appropriate for designs needing extended temperature operation up to 125°C. Choose this part over adjustable variants if a fixed voltage is sufficient. Consider the ±1% tolerance and 150 ppm/°C drift against system accuracy requirements. Verify that the minimum operating current of approximately 45 µA can be sustained by the bias network.

Voltage Reference Part Context

This device belongs to the LM4041 family of precision micropower shunt voltage references from Texas Instruments. The family includes various accuracy grades (A, B, C, D) and output voltages, both fixed and adjustable. The LM4041 series is characterized by its ability to operate with minimal quiescent current, making it ideal for battery-operated devices. The IM7X suffix specifically identifies the SC-70-5 surface-mount package variant within this product line.

Voltage Reference Replacement Considerations

LM4041CIM7X-1.2/NOPB: Offers ±0.5% accuracy and 100 ppm/°C tempco in the same package. LM4041BIM7X-1.2/NOPB: Provides ±0.2% accuracy and 100 ppm/°C tempco. LM4041D12IDCKR: Fixed 1.225V, ±1% accuracy, but in SC-70-5 package with similar electrical specs.