MAX7401EPA

Overview

The MAX7401EPA is an 8th-order, lowpass, Bessel switched-capacitor filter manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply and draws 2mA of operating current. The device features a clock-tunable corner frequency range from 1Hz to 5kHz with a 100:1 clock-to-corner ratio. It supports self-clocking via an external capacitor or external clocking for precise control. A shutdown mode reduces current consumption to 0.2µA. The component includes an offset adjust pin for DC output level adjustment and provides low overshoot and fast settling characteristics.

Feature Summary

• Provides 8th-order lowpass Bessel filtering response with low noise and distortion.
• Offers flexible clocking options including self-clocking and external clock inputs.
• Features a low-power shutdown mode for significant energy savings.
• Includes an offset adjust pin to fine-tune the DC output level.

Applications

• ADC anti-aliasing
• Post-DAC filtering
• Speech processing

Procurement Notes

Verify the specific suffix 'EPA' against official datasheets to confirm package type and temperature grade. Check for end-of-life status or discontinuance notifications as older Maxim components may have limited availability. Ensure compatibility with existing PCB footprints for the PDIP-8 package before procurement.

Selection Notes

Select this component when an 8th-order Bessel response is required for applications needing minimal overshoot and fast settling. Compare against the MAX7405 if a +3V supply is preferred. Consider the need for external clocking versus self-clocking capabilities based on system timing requirements and corner frequency precision needs.

Part Context

The MAX7401 belongs to the family of switched-capacitor filters designed for low-power audio and signal conditioning applications. It is part of Maxim Integrated's portfolio of mixed-signal ICs, often used in conjunction with data converters. The EPA designation typically indicates a plastic DIP package suitable through-hole mounting.

Replacement Considerations

The MAX7405 is a direct functional substitute operating from a +3V supply instead of +5V. Verify voltage compatibility before substitution. Other high-order Bessel filters may require different clocking schemes or supply voltages.