MAX7404ESA+

Overview

The MAX7404ESA+ 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 clock-tunable from 1Hz to 10kHz using a 100:1 clock-to-corner ratio. Supply current is 2mA in normal mode and reduces to 0.2µA in shutdown mode. The device features a low output offset voltage of ±5mV and includes an offset adjustment pin for DC level shifting.

Feature Summary

• 8th-order elliptic response with steep rolloff
• Clock-tunable corner frequency range
• Low-power shutdown capability
• Single-supply operation

Applications

• ADC anti-aliasing
• Post-DAC filtering
• Speech processing
• Air-bag electronics
• CT2 base stations

Procurement Notes

Verify the component matches the exact part number MAX7404ESA+. Confirm the suffix indicates the extended temperature range (-40°C to +85°C) and SOIC package. Ensure authenticity through authorized channels as counterfeit components may exist.

Selection Notes

Select this component when an 8th-order elliptic filter is required with a maximum corner frequency of 10kHz. It is suitable for applications needing low power consumption and single-supply operation at +3V. Consider external clocking if tighter cutoff-frequency control is necessary compared to internal oscillator options.

Part Context

This component belongs to the MAX7400/MAX7403/MAX7404/MAX7407 family of 8th-order lowpass elliptic switched-capacitor filters. The MAX7404 specifically operates on a +3V supply, distinguishing it from the +5V variants like the MAX7400. All members share similar architectural features but differ in supply voltage requirements.

Replacement Considerations

MAX7400ESA+ requires a +5V supply instead of +3V. MAX7403ESA+ also uses +5V but offers a sharper rolloff with a transition ratio of 1.2. MAX7407ESA+ shares the +3V supply but has different rolloff characteristics.