MAX7420EUA+T

Overview

The MAX7420EUA+T is a fifth-order, low-pass switched-capacitor filter (SCF) featuring a Butterworth response. It operates from a single +5V supply with a typical current draw of 3mA and supports corner frequencies ranging from 1Hz to 30kHz via a 100:1 clock-to-corner ratio. The device provides a maximally flat passband response and includes a shutdown mode reducing current to 0.2μA. It utilizes an internal oscillator or external clock input for frequency control, housed in an 8-pin μMAX package.

Feature Summary

• Butterworth filter response providing a maximally flat passband
• Switched-capacitor architecture enabling precise corner frequency tuning
• Low-power operation with dedicated shutdown capability

Applications

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

Procurement Notes

Verify the 'E' suffix indicates the extended temperature range of -40°C to +85°C. Confirm the '+T' suffix denotes tape-and-reel packaging. Ensure the component matches the Analog Devices/Maxim Integrated specification sheet for the MAX7418–MAX7425 series before integration.

Selection Notes

Select this model when a maximally flat passband is required for instrumentation applications. Choose the +5V variant over the +3V family members if system power rails dictate. Verify that the 100:1 clock-to-corner frequency ratio aligns with available clock sources for the desired cutoff frequency.

Part Context

This component belongs to the MAX7418–MAX7425 family of fifth-order, low-pass switched-capacitor filters. While other models in the series offer elliptic or Bessel responses, the MAX7420 specifically delivers a Butterworth characteristic. It shares the same physical footprint and pinout as its siblings within the 8-pin μMAX package.

Replacement Considerations

The MAX7424 serves as the direct +3V equivalent within the same family, offering identical Butterworth characteristics but requiring a different supply voltage.