LM4051BIX3-1.2+T

Voltage Reference Overview

The LM4051BIX3-1.2+T is a precision two-terminal shunt-mode voltage reference manufactured by Maxim Integrated, now part of Analog Devices Inc. It provides a fixed reverse breakdown voltage of 1.225V with an initial accuracy of ±0.2% (Grade B). The device operates within a wide current range of 60µA to 15mA and features a maximum temperature coefficient of 50ppm/°C guaranteed over the -40°C to +125°C extended temperature range. It utilizes an ultra-small 3-pin SC-70 surface-mount package measuring 1.8mm x 1.8mm. The component does not require external stabilizing capacitors and remains stable with any capacitive load.

Voltage Reference Feature Summary

• Ultra-small 3-pin SC-70 surface-mount package for space-critical applications
• No output capacitors required while tolerating capacitive loads
• Laser-trimmed resistors ensure excellent initial accuracy
• Wide operating current range from 60µA to 15mA

Voltage Reference Applications

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

Voltage Reference Procurement Notes

Verify the specific suffix '+T' indicates tape-and-reel packaging if confirmed in official ordering guides. Confirm that 'B' denotes the Grade B accuracy class of ±0.2%. Ensure the manufacturer source is correctly identified as Maxim Integrated or Analog Devices Inc. Check for AEC-Q100 qualification status if automotive application is intended, as this may vary by specific ordering code.

Voltage Reference Selection Notes

Select this component when a fixed 1.225V reference is needed in a minimal footprint. Choose Grade B for a balance of cost and ±0.2% accuracy. Consider the 50ppm/°C temperature coefficient for environments up to 125°C. Verify that the 60µA minimum current requirement fits the system's quiescent power budget. Compare against SOT-23 packages if larger physical size is acceptable for easier handling.

Voltage Reference Part Context

This part belongs to the LM4050/LM4051 family of precision micropower shunt 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 variant specifically refers to the bandgap reference design available in both SC-70 and SOT-23 packages. The 'I' in the part number typically denotes the industrial or extended temperature grade packaging.

Voltage Reference Replacement Considerations

LM4051BIX3-1.2 is the same device without the reel suffix. LM4051AIM3X-1.2 offers Grade A (±0.1%) accuracy. LM4051CIM3X-1.2 offers Grade C (±0.5%) accuracy. LM4050 series devices provide different fixed voltages such as 2.048V or 2.500V.