LM4040AIM3X-2.0

Overview

The LM4040AIM3X-2.0 is a micropower shunt voltage reference manufactured by Texas Instruments, housed in an SOT-23-3 surface-mount package. It provides a fixed output voltage of 2.048 V with an initial accuracy of ±0.1%. The device features a temperature coefficient of 100 ppm/°C and operates within a junction temperature range of -40°C to +125°C. Key electrical parameters include a maximum shunt current of 15 mA and a typical quiescent current of 60 µA at the 2.048 V output level.

Feature Summary

• Delivers high precision with ±0.1% initial accuracy and low temperature drift of 100 ppm/°C for stable reference performance.
• Designed for micropower applications with a typical operating current of 60 µA to extend battery life in portable devices.
• Features internal compensation allowing stable operation without requiring external output capacitors.
• Includes built-in overcurrent protection to limit cathode current to 15 mA, safeguarding the device under fault conditions.

Applications

• Analog-to-digital converter (ADC) reference sources
• Digital-to-analog converter (DAC) voltage references
• Battery-powered measurement instruments
• Portable data acquisition systems

Procurement Notes

Verify the specific suffix 'X' indicates tape-and-reel packaging configuration distinct from standard tube or cut-tape variants. Confirm RoHS compliance status as manufacturing processes may vary by production lot. Ensure the component matches the exact 2.048 V output specification required for the target circuit design.

Selection Notes

Select this component when a compact SOT-23-3 footprint is required alongside high precision. The 100 ppm/°C temperature coefficient suits industrial environments. Consider the 60 µA quiescent current for power-sensitive designs. Verify that the 15 mA maximum shunt current meets the load requirements of the application.

Part Context

This part belongs to the LM4040-N series of micropower shunt voltage references. The family offers various fixed output voltages including 2.048 V, 2.5 V, and 4.096 V. The 'A' grade denotes the highest accuracy tier within the series, while the 'M3' suffix specifies the SOT-23-3 package type used for space-constrained PCB layouts.

Replacement Considerations

LM4040AIM3-2.0/NOPB: Direct equivalent in tube packaging.

FAQ

Does the LM4040AIM3X-2.0 require an external capacitor for stability?

No, the device is internally compensated and does not require an external output capacitor for stable operation.

What is the maximum allowable cathode current for this device?

The maximum shunt current is limited to 15 mA to prevent damage to the device.