MAX873AESA+

Overview

The MAX873AESA+ is a precision voltage reference providing a fixed +2.5V output in an 8-pin SOIC package. It features a maximum temperature coefficient of 7ppm/°C and initial accuracy of ±0.06%. The device operates with a supply voltage range of +4.5V to +18V, drawing a maximum quiescent current of 450µA. It sources up to 10mA and sinks up to 2mA, with low noise characteristics suitable for high-resolution data acquisition systems.

Feature Summary

• Offers extremely low temperature drift combined with excellent line and load regulation for stable operation across wide electrical and environmental conditions.
• Includes a dedicated TEMP pin that provides an output voltage proportional to the die temperature for use in compensation or warning circuits.
• Features a TRIM pin that facilitates adjustment of the reference voltage over a specified range using a simple potentiometer network.

Applications

• 12-bit ADCs and DACs
• Digital Multimeters
• Portable Data-Acquisition Systems
• Low-Power Test Equipment

Procurement Notes

Verify the specific suffix 'A' indicates the tighter ±0.06% initial accuracy grade compared to the 'B' variant. Confirm the '+E' designation corresponds to the lead-free SOIC-8 package code S8-4. Ensure the operating environment remains within the -40°C to +85°C range to maintain guaranteed performance specifications.

Selection Notes

Select this component when a precise 2.5V reference is required with minimal power consumption. The low quiescent current makes it suitable for battery-operated portable equipment. Consider the available trim capability if system calibration requires fine-tuning the output voltage beyond factory presets.

Part Context

This part belongs to the MAX873/MAX875/MAX876 family of low-power, low-drift precision voltage references. While the MAX875 provides +5V and the MAX876 provides +10V, the MAX873 is specifically optimized for the +2.5V output level. All variants share similar architectural features including curvature-correction circuits and laser-trimmed thin-film resistors.

Replacement Considerations

The MAX873BESA+ serves as a lower-accuracy alternative within the same package offering a ±0.10% initial accuracy grade. Designers requiring different output voltages should consider the MAX875AESA+ (+5V) or MAX876AESA+ (+10V) from the same series.

FAQ

Does the MAX873AESA+ require an output capacitor for stability?

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

What is the function of the TEMP pin on the MAX873AESA+?

The TEMP pin provides an output voltage proportional to the die temperature, which can be used for temperature compensation circuits or temperature warning applications.