LM4040DIM3-3.0

Overview

The LM4040DIM3-3.0 is a precision micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed output voltage of 3.0 V with an initial accuracy of ±1%. The device features a maximum temperature coefficient of 150 ppm/°C and operates within a temperature range of -40°C to +85°C. It supports a maximum shunt current of 15 mA and draws a typical operating current of 70 µA. The component is housed in a compact SOT-23-3 surface-mount package.

Feature Summary

• Provides stable fixed output voltage over the industrial temperature range
• Ultra-low operating current suitable for power-restricted designs
• High precision at 25°C with ±1% initial accuracy
• Stable operation when used with capacitive loads

Applications

• Battery-powered systems requiring low quiescent current
• Portable equipment with space constraints
• Industrial control circuits needing precise voltage references
• Data acquisition systems

Procurement Notes

Verify that the ordering suffix matches the required tolerance and temperature grade. Confirm the manufacturer designation as National Semiconductor or Texas Instruments depending on the production era. Ensure the package type corresponds to SOT-23-3. Check for RoHS compliance status if environmental regulations apply to the specific batch.

Selection Notes

Select this component when a 3.0 V reference is needed with moderate precision (1%) and low power consumption. It is suitable for applications where the 150 ppm/°C temperature coefficient meets system requirements. Consider alternative grades like LM4040BIM3 for tighter tolerances if higher accuracy is necessary. Ensure the input voltage exceeds the reference voltage plus the minimum dropout voltage.

Part Context

This component belongs to the LM4040 family of precision micropower shunt voltage references. The family offers various output voltages including 2.048 V, 2.5 V, 4.096 V, and 5.0 V. Different suffixes indicate varying accuracies such as 0.1%, 0.2%, and 0.5%. The DIM3 variant specifically denotes the 3.0 V version in the SOT-23-3 package.

FAQ

What is the maximum shunt current for the LM4040DIM3-3.0?

The maximum shunt current is 15 mA.

Does the LM4040DIM3-3.0 require a series resistor for operation?

Yes, a series resistor is required to limit the current flowing through the device to prevent damage and ensure proper regulation.