LM4040CIMC3-4.1

Overview

The LM4040CIMC3-4.1 is a micropower shunt voltage reference manufactured by Micrel Inc., now part of Microchip Technology. It provides a fixed output voltage of 4.1 V with an initial accuracy of ±0.5%. The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 70 ppm/°C. It draws a typical operating current of 10 µA at 25°C and supports a maximum shunt current of 15 mA. The component is housed in a compact SOT-23-3 surface-mount package, designed for space-constrained applications requiring stable voltage regulation.

Feature Summary

• Provides a fixed 4.1 V reference output with high precision
• Ultra-low power consumption suitable for battery-operated systems
• Stable operation with capacitive loads without oscillation
• Compact SOT-23-3 package for efficient board space utilization

Applications

• Portable instrumentation and measurement devices
• Battery-powered consumer electronics
• Data acquisition systems requiring precise voltage references
• Industrial control circuits with limited power budgets

Procurement Notes

Verify the manufacturer designation carefully, as Micrel was acquired by Microchip Technology. Ensure the ordering suffix matches the required tolerance and packaging format. Confirm RoHS compliance status through official documentation before integration into production designs.

Selection Notes

Select this component when a fixed 4.1 V reference is required with ±0.5% initial accuracy. It is appropriate for designs prioritizing low quiescent current and small footprint. Consider thermal management if operating near the upper temperature limit or under maximum load conditions.

Part Context

This part belongs to the LM4040 family of micropower shunt voltage references. The family offers various fixed output voltages including 2.048 V, 2.5 V, 3.0 V, 4.096 V, and 5.0 V. Different accuracy grades are available, with the 'C' grade denoting ±0.5% initial tolerance. The series is widely used in industrial and commercial applications requiring reliable voltage referencing.

Replacement Considerations

Compatible substitutes include LM4040CIM3-4.1/NOPB from Texas Instruments and LM4040AIM3-4.1-T from Maxim Integrated. Verify pinout compatibility and electrical specifications such as temperature coefficient and operating current before substitution.