The LM4040BIM7X-4.1 is a precision micropower shunt voltage reference from Texas Instruments (formerly National Semiconductor). This integrated circuit provides a stable and accurate voltage reference, crucial for various analog and mixed-signal applications. Its low power consumption and tight tolerance make it ideal for battery-powered devices and high-accuracy instrumentation.

Applications

• Precision voltage regulators
• Data acquisition systems
• Battery-powered instruments
• Industrial control systems
• Critical current sources
• Medical equipment
• Voltage monitoring

Features

• Fixed 4.096V output voltage
• High initial accuracy: ±0.5% (B grade)
• Low temperature coefficient: 20 ppm/°C (typical)
• Wide operating current range: 60 μA to 15 mA
• Low dynamic impedance: 0.7 Ω (typical)
• Micropower operation
• Small SOT-23 package

Benefits

• High Accuracy: Ensures precise and reliable voltage reference, improving the overall accuracy of the application.
• Low Power Consumption: Extends battery life in portable devices.
• Stable Output Voltage: Maintains a consistent output voltage over a wide temperature range, enhancing system stability.
• Small Footprint: The SOT-23 package allows for compact designs.
• Wide Operating Current Range: Provides flexibility in various applications with different current requirements.

The LM4040BIM7X-4.1 requires an external resistor to limit the current flowing through it. The value of this resistor should be chosen to ensure that the current remains within the specified operating range (60 μA to 15 mA) under all conditions. It is important to consider the input voltage and the desired output voltage when selecting the resistor value. The device is available in a small SOT-23 package, making it suitable for space-constrained applications.

This voltage reference is particularly useful in applications where a precise and stable voltage is required but power consumption is a concern. Its performance characteristics make it a reliable choice for demanding applications.