MAX7401CPA

Overview

The MAX7401CPA is an eighth-order, lowpass, Bessel switched-capacitor filter manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates from a single +5V supply and draws 2mA of operating current, reducing to 0.2µA in shutdown mode. The device features a clock-to-corner frequency ratio of 100:1, allowing tunable corner frequencies between 1Hz and 5kHz. It offers -82dB THD plus noise performance and a low output offset of ±5mV. Available in an 8-pin PDIP package, it supports self-clocking via an external capacitor or external clocking for precise control.

Feature Summary

• Provides eighth-order lowpass Bessel filtering characteristics with low overshoot and fast settling times.
• Supports flexible clocking options including self-clocking through an external capacitor or external clock signals.
• Includes a dedicated offset adjust pin for DC output level calibration.

Applications

• Anti-aliasing filters for analog-to-digital converters
• Post-DAC signal conditioning
• Speech processing systems

Procurement Notes

Verify the specific suffix 'CPA' indicates the commercial temperature range and PDIP-8 package configuration. Confirm RoHS compliance status through official documentation as specifications may vary by revision. Ensure the supplier provides valid traceability for this discontinued or legacy component series.

Selection Notes

Select the MAX7401CPA when an eighth-order Bessel response is required for applications demanding minimal phase distortion. Choose this part over the MAX7405 if a +5V single supply is preferred, as the latter requires +3V. Consider the 100:1 clock-to-corner ratio when designing the timing circuitry for target frequency ranges.

Part Context

This component belongs to the MAX7401/MAX7405 family of switched-capacitor filters designed for low-power audio and data acquisition applications. The CP designation typically denotes plastic DIP packaging, while the A suffix often specifies the commercial temperature grade within the Maxim Integrated product line.

Replacement Considerations

The MAX7405 serves as a voltage-compatible alternative requiring a +3V supply instead of +5V. Verify pin compatibility and supply voltage requirements before substitution.