MAX6225AESA+T

Overview

The MAX6225AESA+T is a low-noise, precision voltage reference utilizing buried-zener technology. It provides a fixed +2.500V output with ±0.02% initial accuracy and a maximum temperature coefficient of 3.0ppm/°C. The device operates within an input voltage range of 8V to 36V and supports source/sink currents up to 15mA. It features a supply current of approximately 1.8mA to 3.0mA and maintains stability across a -40°C to +85°C operating temperature range in an 8-pin SO package.

Feature Summary

• Buried-zener technology ensures extremely low noise performance for high-resolution applications.
• Offers optional external trimming and noise reduction capabilities via dedicated pins.
• Provides excellent line and load regulation with low output impedance at high frequencies.
• Remains stable when driving capacitive loads ranging from 0μF to 100μF.

Applications

• High-Resolution Analog-to-Digital and Digital-to-Analog Converters
• High-Accuracy Reference Standard
• High-Accuracy Industrial and Process Control Systems
• Digital Voltmeters
• Precision Current Sources

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging rather than tube packaging. Confirm that the 'E' designation corresponds to the extended -40°C to +85°C temperature grade. Ensure compatibility with RoHS compliance requirements as indicated by the '+' symbol. Cross-reference the exact part number against the manufacturer's current production status to avoid obsolete stock.

Selection Notes

Select this component when a fixed 2.5V reference is required with high precision and low drift. Consider the MAX6241 or MAX6250 if alternative output voltages are needed. Evaluate the need for external trimming or noise reduction features based on system sensitivity. Verify that the 15mA output current capability meets the load requirements of the downstream circuitry.

Part Context

This device belongs to the MAX6225/MAX6241/MAX6250 family of low-noise, precision voltage references. These devices share identical pinouts and feature sets, differing primarily in their fixed output voltages (+2.5V, +4.096V, and +5V respectively). They utilize CMOS processes and buried-zener technology to achieve laboratory-standard temperature stability without heated references.

Replacement Considerations

Direct functional substitutes within the same series include MAX6241AESA+T (4.096V) and MAX6250AESA+T (5.000V), provided the output voltage difference is acceptable. Other packages such as Plastic DIP (AEPA+) or CERDIP (AMJA) offer thermal and mechanical alternatives but require layout adjustments.

FAQ

How can wideband noise be reduced in the MAX6225AESA+T?

Wideband noise can be reduced by adding a 1μF capacitor to the NR (Noise Reduction) pin. Larger capacitance values do not significantly improve noise performance further.

Is the MAX6225AESA+T stable with capacitive loads?

Yes, the device is stable with capacitive load values ranging from 0μF to 100μF for all values of load current.

What is the purpose of the TRIM pin?

The TRIM pin allows for external adjustment of the output voltage. Connecting a potentiometer between OUT and GND with its tap connected to TRIM enables a minimum 0.6% adjustment range without affecting temperature stability.