MAX6173AASA+T

Overview

The MAX6173AASA+T is a high-precision voltage reference from Analog Devices/Maxim Integrated, providing a fixed +2.5V output with ±0.06% initial accuracy and a maximum temperature coefficient of 3ppm/°C. It operates within an input voltage range of 4.5V to 40V, drawing a typical supply current of 320μA. The device sources up to 30mA and sinks 2mA of load current. It features a linear temperature sensor output proportional to die temperature and includes a TRIM pin for fine voltage adjustment. The component is housed in an 8-pin SO package and functions reliably across the -40°C to +125°C automotive temperature range.

Feature Summary

• Proprietary curvature-correction circuit and laser-trimmed thin-film resistors ensure low noise and high precision.
• Integrated TEMP output provides a voltage signal directly proportional to the internal die temperature.
• TRIM input allows for fine-tuning of the output voltage using an external resistive divider network.
• Inherent stability without requiring an external output bypass capacitor, supporting capacitive loads up to 100μF.

Applications

• High-resolution analog-to-digital (ADC) and digital-to-analog (DAC) converters
• Automotive electronic systems
• Precision threshold detectors
• Digital voltmeters

Procurement Notes

Verify the specific suffix against the manufacturer's official ordering information to confirm RoHS compliance and package details. Ensure the selected variant matches the required output voltage and accuracy grade. Confirm availability status through authorized distributors as supply conditions may vary. Cross-reference the datasheet revision date to ensure alignment with current electrical specifications.

Selection Notes

Select this component when a stable 2.5V reference with integrated temperature sensing is required. The wide input voltage range accommodates various supply rails up to 40V. Consider the low quiescent current for battery-operated designs. Verify that the 30mA sourcing capability meets the load requirements. The absence of output capacitance requirements simplifies layout in space-constrained applications.

Part Context

This part belongs to the MAX6173–MAX6177 family of high-precision voltage references. While sharing identical architecture and features, other members of the series provide different preset output voltages such as 3.3V, 4.096V, 5.0V, and 10V. All variants utilize band-gap technology and offer similar performance characteristics regarding noise, drift, and power consumption.

Replacement Considerations

Direct functional substitutes within the same family include MAX6177AASA+T (3.3V), MAX6174AASA+T (4.096V), MAX6175AASA+T (5.0V), and MAX6176AASA+T (10V). These parts share the same package, pinout, and general specifications but differ in their fixed output voltage levels.

FAQ

Does the MAX6173AASA+T require an output capacitor for stability?

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

How can the output voltage be adjusted?

The output voltage can be finely trimmed by connecting a resistive divider network between the OUT, TRIM, and GND pins.

What is the function of the TEMP pin?

The TEMP pin provides an output voltage that is linearly proportional to the die temperature of the device.