LM4040AIM3-2.1-T

Overview

The LM4040AIM3-2.1-T is a micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated, designed for high precision applications. It provides a fixed output voltage of 2.1 V with an initial accuracy of ±0.1%. The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 100 ppm/°C. It utilizes a SOT-23-3 surface-mount package and supports a maximum cathode current of 15 mA. The component exhibits low noise characteristics, typical of 45 µVrms between 10 Hz and 10 kHz, ensuring stable performance in sensitive analog circuits.

Feature Summary

• Provides fixed 2.1 V output with ±0.1% initial accuracy
• Operates over industrial temperature range (-40°C to +85°C)
• Features ultra-low operating current for power-constrained designs
• Stable operation with capacitive loads

Applications

• Portable instrumentation requiring low power consumption
• Battery-powered measurement systems
• Data acquisition systems needing precise voltage references
• ADC and DAC reference inputs

Procurement Notes

Verify the exact suffix against manufacturer documentation, as variations such as +T or /NOPB may indicate specific packaging or compliance differences. Confirm availability through authorized distributors, as some listings indicate limited regional sales. Ensure the ordering part number matches the required accuracy grade and package type specified in the design requirements.

Selection Notes

Select this component when a compact SOT-23-3 footprint is required alongside high precision (±0.1%). It is suitable for designs prioritizing low quiescent current without sacrificing accuracy. Consider the 100 ppm/°C temperature coefficient for environments with moderate thermal fluctuations. Verify that the load current requirements do not exceed the 15 mA maximum cathode current specification.

Part Context

This part belongs to the LM4040 family of micropower shunt voltage references from Maxim Integrated, now part of Analog Devices. The 'AI' designation typically denotes the ±0.1% accuracy grade, while 'M3' indicates the SOT-23-3 package. The series is known for combining high precision with very low power consumption, making it a standard choice for space-constrained, battery-operated electronic devices.

Replacement Considerations

LM4040AIM3-2.1+T is a verified equivalent part number offering identical electrical specifications and pinout compatibility.