MAX7424EUA+T

Overview

The MAX7424EUA+T is a fifth-order, low-pass switched-capacitor filter (SCF) from the MAX7418–MAX7425 series. It provides a Butterworth response with a maximally flat passband and operates on a single +3V supply. The device draws 3mA in operating mode and features a shutdown current of 0.2μA. Corner frequencies are programmable 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 (PSRR) of 70dB, and an insertion gain of -0.2dB at the corner frequency.

Feature Summary

• Butterworth filter response providing a maximally flat passband for instrumentation applications
• Clock-tunable corner frequency ranging from 1Hz to 45kHz via external or internal oscillator
• Low-power operation with 3mA active current and 0.2μA shutdown current
• Single-supply compatibility with +3V operation and integrated offset adjustment

Applications

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

Procurement Notes

Verify the component authenticity by checking the manufacturer's marking and datasheet revision against official Analog Devices documentation. Confirm that the ordering suffix matches the specified temperature range and package type. Ensure compliance with relevant environmental standards as indicated in the product documentation before integration into production designs.

Selection Notes

Select the MAX7424EUA+T when a maximally flat passband response is required for instrumentation or data conversion interfaces. This part is optimized for single +3V supplies, distinguishing it from the +5V variants in the family. Designers must account for the 100:1 clock-to-corner frequency ratio when selecting external clock sources or timing capacitors to achieve the desired cutoff characteristics.

Part Context

This component belongs to the MAX7418–MAX7425 family of fifth-order low-pass switched-capacitor filters. While other members offer elliptic or Bessel responses, the MAX7424 specifically delivers Butterworth characteristics. The 'E' suffix denotes an extended industrial temperature range of -40°C to +85°C, and the '+T' indicates tape-and-reel packaging for automated assembly processes.

Replacement Considerations

Direct functional replacements within the same family include the MAX7420CUA for commercial temperature ranges. For different filter responses, consider the MAX7419/MAX7423 for Bessel characteristics or the MAX7418/MAX7422 for elliptic rolloff. Verify pinout compatibility and supply voltage requirements when substituting.