MAX6225AESA+

Overview

The MAX6225AESA+ is a low-noise, precision buried-zener voltage reference providing a fixed 2.500V output in an 8-pin SO package. It operates within an extended temperature range of -40°C to +85°C with a maximum temperature coefficient of 3ppm/°C and ±0.02% initial accuracy. The device supports input voltages from 8V to 36V, draws approximately 1.8mA supply current, and delivers up to 15mA source/sink current. Key electrical characteristics include 1.5µVp-p noise (0.1Hz to 10Hz), 20ppm/1000h long-term stability, and excellent line/load regulation.

Feature Summary

• Utilizes buried-zener technology for superior noise performance and stability
• Offers optional external trimming and noise reduction capabilities
• Maintains stability across all capacitive loads without oscillation
• Features industry-standard pinout for simplified design integration

Applications

• High-resolution analog-to-digital and digital-to-analog converters
• High-accuracy industrial and process control systems
• Digital voltmeters and high-accuracy reference standards
• Automated test equipment (ATE)
• Precision current sources

Procurement Notes

Verify the specific suffix 'E' confirms the -40°C to +85°C operating range and 'S' indicates the 8-pin SO package. Confirm the '+' suffix denotes lead-free/RoHS compliance as per manufacturer specifications. Ensure the ordering code matches the required temperature coefficient grade and initial accuracy tolerance before procurement.

Selection Notes

Select this component when designing high-resolution data-conversion systems requiring low drift and minimal noise. Consider the 8V to 36V input range and 15mA load capability for system power budgeting. Evaluate the need for external trimming or noise reduction features based on specific application requirements.

Part Context

Part of the MAX6225/MAX6241/MAX6250 family of low-noise precision voltage references. The MAX6225 variant specifically provides a 2.500V output, while other family members offer 4.096V or 5.000V outputs. All share similar buried-zener architecture and performance characteristics.

Replacement Considerations

Direct replacements within the same series include MAX6225AEPA+ (Plastic DIP) or MAX6225ACSA+ (SO, commercial temp). Verify package compatibility and temperature range alignment when substituting.

FAQ

How can wideband noise be reduced in the MAX6225AESA+?

Add a 1μF capacitor to the NR (Noise Reduction) pin to augment wideband noise reduction.

Is the MAX6225AESA+ stable with capacitive loads?

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

Can the output voltage be adjusted externally?

Yes, the output voltage can be trimmed by connecting a potentiometer between OUT and GND, with the tap connected to the TRIM pin.