LM4040B20IDBZRG4

Overview

The LM4040B20IDBZRG4 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 ±0.2%. The device operates within a temperature range of -40°C to +85°C and utilizes a SOT-23 package. Key electrical characteristics include a maximum temperature coefficient of 100 ppm/°C, a typical operating current of 45 µA, and a maximum cathode current of 15 mA. It is RoHS compliant and designed for applications requiring stable voltage references in compact form factors.

Feature Summary

• Provides a fixed 2.048 V output with tight initial tolerance of ±0.2%.
• Features low temperature coefficient of 100 ppm/°C for stability across industrial temperatures.
• Operates with micropower consumption, supporting a wide operating current range from 45 µA to 15 mA.
• Remains stable with all capacitive loads without requiring an output capacitor.

Applications

• Portable battery-powered equipment
• Handheld instruments
• Data acquisition systems

Procurement Notes

Verify the specific suffix RG4 indicates tape and reel packaging when ordering. Confirm the B grade designation corresponds to the required ±0.2% accuracy and 100 ppm/°C temperature coefficient specifications. Ensure the industrial temperature range (-40°C to +85°C) meets the application environmental requirements before procurement.

Selection Notes

Select this component when a 2.048 V reference is needed with high precision (±0.2%) in a small SOT-23 package. It is suitable for designs prioritizing low power consumption and stability over a wide current range. Consider the industrial temperature rating if operation exceeds commercial limits. Verify compatibility with existing circuit layouts due to the specific pinout of the SOT-23-3 package.

Part Context

This part belongs to the LM4040 family of precision micropower shunt voltage references from Texas Instruments. The family offers various fixed output voltages including 2.048 V, 2.5 V, 3 V, 4.096 V, 5 V, 8.192 V, and 10 V. Different grades (A, B, C, D) provide varying levels of accuracy and temperature coefficient performance to suit diverse design needs.

Replacement Considerations

LM4040B20IDBZR is the non-reel version of the same component. LM4040A20IDBZRG4 offers higher accuracy (±0.1%) but may have different cost implications. LM4040C20IDBZRG4 provides lower accuracy (±0.5%). Verify pinout and thermal characteristics when substituting.