MAX7405EPA

Overview

The MAX7405EPA is an eighth-order, lowpass, Bessel switched-capacitor filter (SCF) designed for single-supply operation at +3V. It draws 2mA in operating mode and 0.2µA in shutdown mode. The device features a clock-to-corner frequency ratio of 100:1, allowing corner frequencies from 1Hz to 5kHz via external clocking or self-clocking with an external capacitor. It offers -82dB THD plus noise, ±5mV output offset, and an offset adjust pin for DC level control.

Feature Summary

• Provides eighth-order lowpass Bessel filtering characteristics with low overshoot and fast settling times.
• Supports flexible clocking options including self-clocking via external capacitor or external clock input for precise corner-frequency control.
• Includes a dedicated offset adjust pin to fine-tune the DC output level.

Applications

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

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment against the datasheet specifications. Check for manufacturing date codes and lot traceability to ensure compliance with project requirements.

Selection Notes

Select this component when a high-order Bessel response is required for applications prioritizing linear phase and minimal overshoot. Ensure the system power supply matches the +3V requirement and that the desired cutoff frequency falls within the 1Hz to 5kHz range supported by the 100:1 clock ratio.

Part Context

This part belongs to the MAX740x family of switched-capacitor filters, which also includes the MAX7401 (+5V supply). Both devices share identical electrical performance and pinouts but differ in their specified operating voltage ranges. The EPA suffix indicates an 8-pin PDIP package.

Replacement Considerations

The MAX7401CPA serves as a functional substitute if the application supports a +5V supply instead of +3V. Verify that the replacement part's voltage rating aligns with the target circuit design before implementation.