LM4051BIX3-1.2

Voltage Reference Overview

The LM4051BIX3-1.2 is a precision micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed reverse breakdown voltage of 1.225V with an initial accuracy of ±0.2%. The device operates within a wide current range of 60µA to 15mA and features a maximum temperature coefficient of 50ppm/°C over the -40°C to +125°C temperature range. It utilizes a subminiature 3-pin SC-70 surface-mount package (1.8mm x 1.8mm) and requires no output capacitors for stability.

Voltage Reference Feature Summary

• Ultra-small 3-pin SC-70 surface-mount package
• No output capacitors required for stability
• Tolerates capacitive loads

Voltage Reference Applications

• Portable, battery-powered equipment
• Notebook computers
• Cell phones
• Industrial process controls
• Automotive applications

Voltage Reference Procurement Notes

Verify that the specific suffix 'IX3' corresponds to the SC-70 package variant as documented in official Maxim Integrated datasheets. Confirm that the 'B' grade designation aligns with the required ±0.2% initial accuracy specification for your design. Ensure compatibility with the 1.225V fixed output requirement. Cross-reference ordering information for any specific environmental or automotive qualification requirements associated with this part number.

Voltage Reference Selection Notes

Select this component when space constraints necessitate the use of the SC-70 package over the larger SOT-23 option. Choose this part if the design requires a fixed 1.225V reference with ±0.2% accuracy rather than the higher precision A-grade options. Verify that the operating environment falls within the specified -40°C to +125°C range and that the load current remains between 60µA and 15mA.

Voltage Reference Part Context

This component belongs to the LM4050/LM4051 family of precision two-terminal shunt-mode bandgap voltage references. The family offers multiple fixed reverse breakdown voltages including 1.225V, 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V. The LM4051 series is distinguished by its availability in both SOT-23 and SC-70 packages, catering to different spatial requirements while maintaining low power consumption and high precision.

Voltage Reference Replacement Considerations

LM4051AIX3-1.2: Offers higher initial accuracy of ±0.1% in the same SC-70 package. LM4051CEX3-1.2: Provides ±0.5% accuracy in the SC-70 package. LM4051BEM3-1.2/NOPB: Equivalent performance but housed in the larger SOT-23 package.