MAX6325EPA

Overview

The MAX6325EPA is a buried-zener voltage reference providing a fixed 2.5V output in an 8-pin Plastic DIP package. It operates within an input voltage range of 8V to 36V and supports an operating temperature range from -40°C to +85°C. The device features a maximum temperature coefficient of 1.5ppm/°C, ±0.02% initial accuracy, and 1.5µVp-p noise (0.1Hz to 10Hz). It guarantees load regulation for source and sink currents up to ±15mA with a typical supply current of 2.7mA.

Feature Summary

• Utilizes buried-zener technology to achieve extremely low noise performance and high stability.
• Offers optional external trimming via the TRIM pin and wideband noise reduction via the NR pin.
• Maintains stability across all 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
• ATE Equipment

Procurement Notes

Verify the specific suffix 'EPA' corresponds to the required -40°C to +85°C temperature grade and 8-pin PDIP package. Confirm that the 1.5ppm/°C temperature coefficient meets design requirements, as lower grades exist. Ensure input voltages remain between 8V and 36V to maintain specified line regulation and operational integrity.

Selection Notes

Select this component when a fixed 2.5V precision reference is required with minimal temperature drift. The buried-zener architecture provides superior noise characteristics compared to bandgap references. Consider the available trim and noise reduction pins if the application demands tighter tolerance or lower spectral noise density than standard specifications.

Part Context

This part belongs to the MAX6325/MAX6341/MAX6350 family of low-noise, precision voltage references. While the MAX6341 provides 4.096V and the MAX6350 provides 5V, the MAX6325 is specifically configured for 2.5V outputs. All variants share identical pinouts, packaging options, and core architectural features such as buried-zener technology.

Replacement Considerations

MAX6325CPA (0°C to +70°C), MAX6325ESA (-40°C to +85°C, SOIC package)

FAQ

How can the output noise be reduced?

Connect a 1µF capacitor to the NR (Noise Reduction) pin to augment wideband noise reduction. Larger values do not significantly improve noise performance.

Is the device stable with capacitive loads?

Yes, the MAX6325EPA is stable with capacitive load values ranging from 0µF to 100µF for all values of load current.