LM4040C20IDBZR

Overview

The LM4040C20IDBZR is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 2.048 V with an initial accuracy of ±0.5%. The device operates within a temperature range of -40°C to +85°C and features a low temperature coefficient of 100 ppm/°C. It requires a minimum cathode current of 80 µA and supports a maximum cathode current of 15 mA. The component is housed in a surface-mount SOT-23-3 package.

Feature Summary

• Provides stable fixed voltage reference for analog circuits
• Operates at micropower levels suitable for battery applications
• Ensures high precision through tight initial accuracy tolerance

Applications

• Portable instrumentation requiring precise voltage references
• Battery-powered measurement systems
• Data acquisition systems needing stable reference voltages

Procurement Notes

Verify the specific suffix IDBZR confirms the SOT-23-3 surface mount package and tape-and-reel delivery format. Confirm the C grade designation aligns with the required ±0.5% accuracy specification for your design. Ensure the operating temperature range meets environmental requirements. Check RoHS compliance status if restricted substances are a constraint. Validate pinout compatibility during PCB layout integration.

Selection Notes

Select this component when a compact, low-power shunt reference is needed for 2.048 V applications. The SOT-23-3 package offers space efficiency for dense layouts. Consider the 100 ppm/°C temperature coefficient for thermal stability needs. Ensure circuit design accommodates the 80 µA minimum operating current. Evaluate noise performance if signal integrity is critical in the application.

Part Context

This part belongs to the LM4040 family of micropower shunt voltage references from Texas Instruments. The family includes various output voltages and accuracy grades. The LM4040 series is designed for applications requiring small size and low power consumption. It serves as a cost-effective alternative to larger voltage reference components in portable electronics.

Replacement Considerations

Direct substitutes include other LM4040 variants with matching 2.048 V output and SOT-23-3 packaging. Verify that replacement parts maintain the same ±0.5% accuracy and temperature coefficient specifications. Ensure compatible minimum operating currents to prevent regulation failure.