MAX7422EUA+T

Overview

The MAX7422EUA+T is a fifth-order, low-pass, switched-capacitor filter with an elliptic response and a transition ratio of 1.6. It operates from a single +3V supply (2.7V to 3.6V) and draws 3mA in operating mode. The corner frequency is clock-tunable from 1Hz to 45kHz using a 100:1 clock-to-corner ratio. Key electrical parameters include a typical output offset voltage of ±4mV, a power-supply rejection ratio of 70dB, and a shutdown current of 0.2μA. It features an internal oscillator or external clock input, housed in an 8-pin μMAX package.

Feature Summary

• Elliptic low-pass filter response with sharp rolloff
• Clock-tunable corner frequency for flexible design
• Low-power operation with deep shutdown capability
• Single-supply compatibility for simplified integration

Applications

• ADC anti-aliasing
• DAC post-filtering
• CT2 base stations
• Speech processing

Procurement Notes

Verify the component against official Analog Devices documentation to confirm authenticity. Ensure the ordering suffix matches the required temperature range and packaging specifications. Cross-reference the part number with authorized distributors to validate sourcing channels. Confirm RoHS compliance status as indicated by the plus sign in the model designation.

Selection Notes

Select this device when a steep roll-off is required within a single +3V supply system. The elliptic response provides superior stopband attenuation compared to Butterworth or Bessel alternatives. Verify that the application can accommodate the 100:1 clock-to-corner frequency ratio and that the input impedance characteristics align with the driving source capabilities.

Part Context

This component belongs to the MAX7418–MAX7425 family of fifth-order, low-pass, switched-capacitor filters. The MAX7422 variant specifically offers an elliptic response optimized for applications requiring high selectivity. It shares the same pinout and operational principles as other members of the series, differing primarily in filter response type and operating voltage requirements.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided datasheet.