MAX7405CPA+

Overview

The MAX7405CPA+ is an 8th-order, lowpass, Bessel switched-capacitor filter designed for single-supply operation at +3V. It features a clock-tunable corner frequency ranging from 1Hz to 5kHz with a fixed 100:1 clock-to-corner ratio. The device draws 2mA in operating mode and reduces to 0.2µA in shutdown mode. It offers -82dB THD+N, ±5mV output offset, and supports both internal oscillator (via external capacitor) and external clocking options.

Feature Summary

• Provides 8th-order lowpass Bessel filtering characteristics with fast settling times and low overshoot.
• Features a low-power shutdown mode that significantly reduces supply current consumption.
• Supports flexible clocking configurations using either an internal oscillator or an external clock source.

Applications

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

Procurement Notes

Verify the component matches the specific +3V supply requirement of the MAX7405 variant rather than the MAX7401. Confirm the package type corresponds to the 'PA' suffix designation. Ensure the ordering information aligns with the manufacturer's official documentation to avoid functional discrepancies.

Selection Notes

Select this component when a Bessel response is required for signal integrity preservation. Verify that the system operates on a single +3V supply rail. Consider the 100:1 clock-to-corner ratio when designing the clock generation circuitry to ensure the desired cutoff frequency is accurately achieved.

Part Context

This part belongs to the MAX7401/MAX7405 family of 8th-order switched-capacitor filters. The primary distinction between variants is the supply voltage rating; the MAX7405 is optimized for +3V operation, whereas the MAX7401 supports +5V. Both share identical filter topology and performance metrics.

Replacement Considerations

MAX7401CPA+