MAX7405ESA+T

Overview

The MAX7405ESA+T 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. Key electrical parameters include a typical Total Harmonic Distortion plus Noise (THD+N) of -84dB, an output offset voltage of ±5mV, and a power-supply rejection ratio of 60dB. It operates within a temperature range of -40°C to +85°C.

Feature Summary

• Provides 8th-order lowpass Bessel filtering characteristics for fast settling and low overshoot.
• Supports both self-clocking via external capacitor and external clock input for precise corner frequency control.
• Includes a dedicated shutdown pin to minimize power consumption during idle periods.
• Features an offset adjust pin allowing DC output level adjustment or connection to common mode.

Applications

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

Procurement Notes

Verify the component status as discontinued through official Analog Devices channels before finalizing design-in decisions. Confirm that the specific ordering suffix corresponds to the required package type and temperature grade. Ensure compliance with RoHS directives by checking the latest manufacturer documentation for environmental certifications.

Selection Notes

Select the MAX7405ESA+T when a +3V single supply is available, as the MAX7401 variant requires +5V. Choose this part for applications requiring tight corner frequency stability via external clocking. Verify that the 100:1 clock-to-corner ratio aligns with the system's clock generation capabilities and that the 5kHz maximum cutoff meets signal bandwidth requirements.

Part Context

This component belongs to the MAX7401/MAX7405 family of 8th-order switched-capacitor filters. The MAX7405 specifically denotes the +3V supply version, while the MAX7401 supports +5V. Both share identical filter topology and performance metrics, differing primarily in operating voltage specifications and internal biasing requirements.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided datasheet or source material. Designers should consult Analog Devices directly for current replacement recommendations or equivalent product lines.