MAX6143BASA25+T

Overview

The MAX6143BASA25+T is a high-precision series voltage reference with an integrated temperature sensor, manufactured by Analog Devices/Maxim Integrated. It provides a fixed +2.5V output with ±0.1% initial accuracy and a maximum temperature coefficient of 10ppm/°C over the -40°C to +125°C automotive range. The device accepts input voltages from VOUT + 2V up to +40V, draws 340µA typical supply current, and sources 30mA or sinks 2mA load current. It features an active-low shutdown pin reducing current to 0.01µA, a TRIM input for fine adjustment, and a TEMP output proportional to die temperature. Packaged in an 8-pin SOIC.

Feature Summary

• Integrated linear temperature transducer output proportional to die temperature
• Active-low shutdown feature reduces quiescent supply current to near-zero levels
• TRIM input allows fine adjustment of the preset output voltage using external resistors
• Stable without external output bypass capacitors and supports large capacitive loads

Applications

• High-resolution A/D and D/A converters
• Precision voltage regulators
• Threshold detectors
• Digital voltmeters

Procurement Notes

Verify the specific suffix 'B' indicates the 0.1% accuracy grade and 10ppm/°C temperature coefficient variant, distinct from the 'A' grade. Confirm the 'SA' designation corresponds to the SOIC package and '+T' denotes tape-and-reel packaging. Ensure the component matches the official Analog Devices/Maxim Integrated datasheet specifications for the MAX6143 family before integration into designs requiring precise thermal and voltage stability.

Selection Notes

Select this component when a fixed 2.5V reference with moderate precision (0.1%) is required alongside on-die temperature monitoring capabilities. It is suitable for applications needing low power consumption via shutdown mode and high noise immunity without external filtering capacitors. Consider the B-grade specifications if tighter tolerances are not critical, offering a cost-effective solution compared to the A-grade version while maintaining robust performance across the full automotive temperature range.

Part Context

The MAX6143 belongs to a family of high-precision voltage references featuring proprietary curvature-correction circuits and laser-trimmed thin-film resistors. This specific part integrates a temperature sensor output, distinguishing it from standard references. It utilizes bandgap technology to achieve low noise and excellent accuracy, designed for space-critical applications where eliminating output capacitors saves board area.

Replacement Considerations

MAX6143AASA25+T offers higher precision (0.06% accuracy, 3ppm/°C TC) with identical pinout and functionality.

FAQ

How does the MAX6143BASA25+T handle output stability without external capacitors?

The device is internally compensated and stable without an output bypass capacitor, supporting capacitive loads up to 100µF.

What is the function of the TEMP pin on this component?

The TEMP pin provides an output voltage that is linearly proportional to the internal die temperature, enabling temperature sensing applications.