MAX6143AASA25+

Overview

The MAX6143AASA25+ is a high-precision series voltage reference with an integrated temperature sensor, manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output voltage of 2.500V with an initial accuracy of ±0.06% and a maximum temperature coefficient of 3ppm/°C over the -40°C to +125°C automotive operating range. The device accepts input voltages from (VOUT + 2V) up to +40V, draws a typical supply current of 340µA, and can source up to 30mA or sink 2mA of load current. It features a low shutdown current of 0.01µA and does not require an external output capacitor for stability.

Feature Summary

• Proprietary curvature-correction circuit and laser-trimmed thin-film resistors ensure high precision and low drift.
• Integrated linear temperature transducer output proportional to die temperature for sensing applications.
• Active-low shutdown pin reduces quiescent supply current to negligible levels for power-sensitive designs.
• Capable of fine-tuning the preset output voltage using an external resistive-divider network on the TRIM pin.

Applications

• High-resolution A/D converters
• D/A converters
• Threshold detectors
• Digital voltmeters

Procurement Notes

Verify the specific suffix 'A' indicates the 0.06% accuracy grade and 'S' denotes the SO package. Confirm the '+' suffix aligns with RoHS compliance requirements. Ensure the ordering code matches the exact 2.5V output specification required for your design.

Selection Notes

Select this component when a stable 2.5V reference is needed alongside temperature monitoring capabilities. The wide input voltage range accommodates various supply rails, while the low noise profile supports precision signal chain applications requiring minimal external filtering components.

Part Context

This part belongs to the MAX6143 family of high-precision voltage references. The 'A' suffix distinguishes it from the 'B' variant by offering tighter initial accuracy (0.06% vs 0.1%) and superior temperature stability (3ppm/°C vs 10ppm/°C). It shares the same 8-pin SO package and functional interface as other outputs in the series.

Replacement Considerations

MAX6143BASA25+

FAQ

Does the MAX6143AASA25+ require an output bypass capacitor?

No, the device does not require an external output capacitor for stability and remains stable with capacitive loads up to 100µF.

How is the internal temperature sensor utilized?

The TEMP pin provides an output voltage that is linearly proportional to the die temperature, allowing the device to function as a temperature transducer.