MAX7423EUA-T

Overview

The MAX7423EUA-T is a fifth-order, low-pass switched-capacitor filter (SCF) from the MAX7418–MAX7425 series. It provides a Bessel response with a clock-to-corner frequency ratio of 100:1 and operates on a single +3V supply. The device draws 3mA in operating mode and 0.2μA in shutdown mode. It supports corner frequencies from 1Hz to 45kHz via internal or external clocking. Key electrical parameters include a typical output offset voltage of ±4mV, a power-supply rejection ratio (PSRR) of 70dB, and an input resistance at COM of 140kΩ. It is housed in an 8-pin μMAX package.

Feature Summary

• Bessel filter response for low overshoot and fast settling
• Clock-tunable corner frequency ranging from 1Hz to 45kHz
• Low-power operation with dedicated shutdown mode
• Single-supply operation optimized for +3V systems

Applications

• ADC anti-aliasing
• DAC postfiltering
• CT2 base stations
• Speech processing

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm temperature range and packaging details. Ensure the component matches the required operational voltage and filter response characteristics for your design. Cross-reference the manufacturer's latest datasheet to validate pin configurations and absolute maximum ratings before integration.

Selection Notes

Select this component when a Bessel response is required for applications needing minimal phase distortion and fast settling times. It is suitable for single-supply designs requiring low power consumption and precise corner frequency control through clock tuning. Verify that the system can provide the necessary clock signal or accommodate the internal oscillator capacitor requirements.

Part Context

This part belongs to the MAX7418–MAX7425 family of fifth-order, low-pass switched-capacitor filters. The series includes elliptic, Bessel, and Butterworth variants. The MAX7423 specifically offers a Bessel response and is designed for +3V single-supply operation, distinguishing it from the +5V variants in the same family.

Replacement Considerations

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