MAX6143BASA50+T

Overview

The MAX6143BASA50+T is a high-precision series voltage reference providing a fixed +5.0V output with ±0.1% initial accuracy and a maximum temperature coefficient of 10ppm/°C. It accepts input voltages from VOUT + 2V up to +40V, drawing 340µA typical supply current. The device 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. It operates over -40°C to +125°C in an 8-pin SO package.

Feature Summary

• Integrated linear temperature transducer output proportional to die temperature
• Active-low shutdown capability significantly reduces quiescent supply current
• Resistive-divider trim input allows fine adjustment of the preset output voltage
• Stable without external output bypass capacitors while supporting large capacitive loads

Applications

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

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm the 'B' grade designation corresponds to the required 10ppm/°C temperature coefficient and 0.1% accuracy specifications rather than the higher precision 'A' grade. Ensure the manufacturer is identified as Analog Devices or Maxim Integrated for authenticity checks.

Selection Notes

Select this component when a fixed 5V reference with integrated temperature sensing is required. The B-grade specification suits applications tolerating 10ppm/°C drift. Consider the TRIM pin if post-calibration adjustment is necessary. Verify that the 340µA quiescent current fits the system power budget compared to lower-power alternatives.

Part Context

This part belongs to the MAX6143 family of high-precision voltage references featuring proprietary curvature-correction circuits. The family includes variants with different output voltages and accuracy grades (A and B). The MAX6143 integrates bandgap technology with laser-trimmed thin-film resistors to achieve low noise and excellent stability across wide operating conditions.

Replacement Considerations

MAX6143AASA50+ offers tighter accuracy (0.06%) and lower tempco (3ppm/°C) but requires verification of package compatibility.

FAQ

Does the MAX6143 require an output capacitor for stability?

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

How is the shutdown function activated?

The active-low SHDN pin activates shutdown when connected to GND, reducing supply current to 0.01µA. Connect it to IN for normal operation.