MAX6226ALA25+T

Overview

The MAX6226ALA25+T is an ultra-low-noise, high-precision series voltage reference featuring a fixed 2.500V output with ±0.02% initial accuracy and a maximum temperature coefficient of 3ppm/°C over the -40°C to +125°C automotive range. It operates from a 2.7V to 12.6V supply with a typical quiescent current of 380µA and dropout voltage as low as 200mV. The device provides 10mA sink/source capability, 11ppm/1000hr long-term drift, and includes force/sense outputs for remote sensing.

Feature Summary

• Hermetically sealed 8-pin ceramic LCC package eliminates humidity-induced stress and improves long-term stability
• Ultra-low flicker noise architecture produces 1.45µVP-P noise (0.1Hz to 10Hz) without increased supply current
• Independent force and sense outputs enable precise remote sensing by canceling line voltage drops
• Curvature-correction circuitry and laser-trimmed thin-film resistors ensure high precision and low thermal hysteresis

Applications

• High-resolution A/D and D/A converters
• ATE equipment
• Precision current sources
• Digital voltmeters
• High-accuracy industrial and process control systems

Procurement Notes

Verify the specific suffix '+T' indicates tape-and-reel packaging when sourcing components. Confirm that the 'A' grade designation corresponds to the required ±0.02% accuracy and 3ppm/°C temperature coefficient specifications. Ensure the supplier provides documentation confirming the hermetic ceramic LCC package construction for environmental reliability.

Selection Notes

Select this component for applications requiring minimal noise and high precision in harsh environments. The ceramic package offers superior stability compared to plastic alternatives. Consider the 2.5V output level and 10mA drive capability against load requirements. Evaluate the need for remote sensing via force/sense pins to maintain accuracy across PCB traces.

Part Context

This part belongs to the MAX6226 family of ultra-high-precision, ultra-low-noise series voltage references manufactured by Analog Devices / Maxim Integrated. The family includes variants with 3.3V and 5.0V outputs, all sharing the same hermetic ceramic package and advanced curvature-correction technology designed for demanding analog signal processing tasks.

Replacement Considerations

Direct replacements within the MAX6226 family include MAX6226ALA33+T (3.3V) and MAX6226ALA50+T (5.0V). Verify pin compatibility and output voltage requirements before substitution.

FAQ

How does the ceramic LCC package affect long-term stability?

The hermetically sealed ceramic package prevents humidity ingress and reduces mechanical stress on the die, resulting in excellent long-term drift performance of typically 11ppm per 1000 hours.

What is the purpose of the NR pin?

The NR (Noise Reduction) pin allows users to improve wideband noise and AC power-supply rejection by connecting a 0.1µF capacitor, reducing noise from 75nV/√Hz to 45nV/√Hz.