MAX7403EPA+

Overview

The MAX7403EPA+ is an 8th-order, lowpass, elliptic switched-capacitor filter operating from a single +5V supply. It features a sharp rolloff with a transition ratio of 1.2 and typical stopband rejection of 60dB. The corner frequency is tunable from 1Hz to 10kHz via a 100:1 clock-to-corner ratio using either an external capacitor or an external clock signal. Key electrical parameters include a typical supply current of 2mA in operating mode and 0.2µA in shutdown mode. The device provides a low output offset voltage of ±5mV and supports manual offset adjustment through the OS pin.

Feature Summary

• Provides steep attenuation characteristics suitable for anti-aliasing and post-DAC filtering applications
• Offers flexible clocking options including self-clocking via external capacitor or external clock input for precise control
• Includes a dedicated shutdown mode that significantly reduces power consumption

Applications

• ADC Anti-Aliasing
• Post-DAC Filtering
• Speech Processing
• Air-Bag Electronics
• CT2 Base Stations

Procurement Notes

Verify the specific suffix 'EPA+' corresponds to the extended temperature range (-40°C to +85°C) and plastic DIP-8 package configuration. Confirm RoHS compliance status as indicated in official documentation before procurement. Ensure compatibility with single +5V supply requirements and check for any regional distribution restrictions.

Selection Notes

Select this component when an 8th-order elliptic response with a tight transition ratio of 1.2 is required. It is appropriate for designs needing a maximum corner frequency of 10kHz with a 100:1 clock-to-corner ratio. Consider the +5V supply constraint and the availability of PDIP-8 packaging for through-hole implementation.

Part Context

This part belongs to the MAX7400/MAX7403/MAX7404/MAX7407 family of 8th-order lowpass elliptic switched-capacitor filters. While sharing similar architectures, the MAX7403 is distinguished by its +5V operating voltage and sharper rolloff characteristics compared to other variants in the series.

Replacement Considerations

MAX7400EPA+ offers similar functionality but with a transition ratio of 1.5 and higher stopband rejection (82dB). MAX7404EPA+ operates at +3V. Verify electrical parameter alignment and package compatibility before substitution.