MAX6173AASA+

Overview

The MAX6173AASA+ is a high-precision, low-noise voltage reference providing a fixed +2.5V output. It features a maximum temperature coefficient of 3ppm/°C and an initial accuracy of ±0.06%. The device accepts input voltages from (VOUT + 2V) up to +40V and draws a typical supply current of 320μA. It can source up to 30mA or sink 2mA of load current. Key features include a linear temperature sensor output on the TEMP pin, a TRIM input for fine voltage adjustment, and stability without external output capacitors. It operates over an extended temperature range of -40°C to +125°C in an 8-pin SO package.

Feature Summary

• Proprietary curvature-correction circuit and laser-trimmed thin-film resistors ensure high precision and low noise performance.
• Integrated linear temperature transducer output provides a voltage proportional to die temperature for sensing applications.
• TRIM input allows fine adjustment of the output voltage using a resistive divider network.
• Stable with capacitive loads up to 100μF without requiring an external output bypass capacitor.

Applications

• High-resolution analog-to-digital converters (ADCs)
• Digital-to-analog converters (DACs)
• Automotive electronic systems
• Precision digital voltmeters

Procurement Notes

Verify the specific suffix 'AASA+' against the manufacturer's official ordering guide to confirm the package type, temperature grade, and RoHS compliance status. Ensure the required output voltage variant matches the MAX6173 designation (+2.5V). Confirm availability through authorized distributors as supply conditions may vary.

Selection Notes

Select this component when a stable +2.5V reference with integrated temperature sensing is required. It is suitable for space-constrained designs due to the elimination of output capacitors. Consider the 30mA sourcing capability for driving moderate loads directly. Verify that the input voltage range accommodates the system's supply variations while maintaining regulation.

Part Context

The MAX6173AASA+ belongs to the MAX6173–MAX6177 family of high-precision voltage references from Analog Devices/Maxim Integrated. This series shares common architectural features, including band-gap technology, low quiescent current, and short-circuit protection. Variants within the family differ primarily by their preset output voltages, ranging from +2.5V to +10V, while maintaining similar performance characteristics.

Replacement Considerations

Direct functional substitutes within the same family include other MAX617x variants with different preset voltages if the system architecture allows for voltage adjustment. Cross-family replacements require matching the output voltage, accuracy class, temperature coefficient, and package dimensions.

FAQ

Does the MAX6173AASA+ require an output capacitor for stability?

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

What is the function of the TEMP pin?

The TEMP pin provides a linear voltage output proportional to the die temperature, making the device suitable for temperature-sensing applications.

How can the output voltage be adjusted?

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