MAX6173BASA+

Overview

The MAX6173BASA+ is a high-precision series voltage reference providing 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 range. It accepts input voltages from (VOUT + 2V) up to +40V, draws 450µA maximum supply current, and sources 30mA or sinks 2mA. The device includes a linear temperature sensor output proportional to die temperature and a TRIM pin for fine adjustment via a resistive divider.

Feature Summary

• Proprietary curvature-correction circuit and laser-trimmed thin-film resistors ensure low noise and high precision.
• Integrated linear temperature transducer provides an output voltage proportional to the internal die temperature.
• TRIM input allows fine adjustment of the preset output voltage using an external resistive divider network.
• Stable without external output capacitors and supports capacitive loads up to 100µF.

Applications

• High-resolution analog-to-digital converters
• Digital-to-analog converters
• Precision digital voltmeters
• Automotive electronic systems

Procurement Notes

Verify the specific suffix 'B' indicates the required 0.1% initial accuracy tier rather than the tighter 0.06% option. Confirm the 'ASA+' designation corresponds to the standard SOIC-8 package and RoHS compliance. Ensure the application input voltage exceeds the minimum dropout requirement relative to the 2.5V output.

Selection Notes

Select this component when a stable 2.5V reference is needed alongside integrated temperature sensing capabilities. The B-grade accuracy suits applications requiring tighter tolerance than the A-grade variant. Consider the 10ppm/°C drift limit against the system's total error budget across the full automotive temperature range.

Part Context

This part belongs to the MAX6173–MAX6177 family of bandgap voltage references manufactured by Analog Devices / Maxim Integrated. The family shares identical architecture and pinouts but varies in factory-set output voltages ranging from +2.5V to +10V and initial accuracy grades.

Replacement Considerations

Direct functional substitutes within the same family include the MAX6173AASA+ for tighter accuracy or other MAX617x variants if the 2.5V output is not mandatory. Verify that any replacement maintains the 8-pin SO package and compatible thermal characteristics.

FAQ

Does the MAX6173BASA+ 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 output voltage trimmed on this device?

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