MAX7404ESA+T

Overview

The MAX7404ESA+T is an 8th-order, lowpass, elliptic switched-capacitor filter operating from a single +3V supply. It provides a sharp rolloff with a transition ratio of 1.5 and typical stopband rejection of 82dB. The corner frequency is tunable from 1Hz to 10kHz via a 100:1 clock-to-corner ratio using either an external capacitor or an external clock signal. Key electrical parameters include a supply current of 2mA in operating mode and 0.2µA in shutdown mode, an output offset voltage of ±5mV, and a power-supply rejection ratio of 60dB. The device is housed in an 8-pin SO package.

Feature Summary

• Provides high-stopband rejection with a steep transition ratio for effective anti-aliasing and post-DAC filtering.
• Features a low-power shutdown mode that significantly reduces supply current consumption.
• Allows flexible corner frequency selection through self-clocking or external clocking options.

Applications

• ADC Anti-Aliasing
• Post-DAC Filtering
• Speech Processing

Procurement Notes

Verify the component authenticity by checking the manufacturer markings against official documentation. Confirm the specific suffix indicates the correct temperature range and packaging format. Ensure the ordering information matches the required specifications before finalizing procurement decisions.

Selection Notes

Select this component when an 8th-order elliptic response is required with a +3V single supply. It is suitable for applications needing precise corner frequencies between 1Hz and 10kHz. Consider the 100:1 clock-to-corner ratio for design flexibility regarding clock source generation.

Part Context

This part belongs to the MAX7400 family of 8th-order lowpass elliptic switched-capacitor filters. It shares architectural similarities with the MAX7400, MAX7403, and MAX7407 but is specifically optimized for +3V operation unlike the +5V variants. The 'ESA' designation indicates an industrial temperature range and SOIC package.

Replacement Considerations

The MAX7400 serves as a functional equivalent requiring a +5V supply instead of +3V. The MAX7407 offers a sharper rolloff with a transition ratio of 1.2 but maintains the same +3V operating voltage requirement.