MAX7408EUA/GG8

Overview

The MAX7408EUA/GG8 is a 5th-order, lowpass, elliptic switched-capacitor filter operating from a single +5V supply. It features a clock-tunable corner frequency ranging from 1Hz to 15kHz with a transition ratio of 1.6 and typical stopband rejection of 53dB. The device draws 1.2mA in operating mode and reduces to 0.2µA in shutdown mode. It supports self-clocking via an external capacitor or external clock input for tighter control. The component provides low noise and distortion (-80dB THD + Noise) and includes an offset-adjust pin for DC output level tuning.

Feature Summary

• Provides sharp rolloff with 53dB stopband rejection using a 5th-order elliptic architecture
• Supports both internal oscillator and external clock inputs for flexible corner frequency adjustment
• Features ultra-low power consumption with a dedicated shutdown mode reducing current to 0.2µA
• Includes an offset-adjust pin allowing precise DC output level tuning

Applications

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

Procurement Notes

Verify the specific suffix 'GG8' against official Analog Devices documentation, as standard datasheets list 'EUA' (8-pin µMAX). Confirm temperature range and package availability directly with the manufacturer or authorized distributors to ensure compatibility with design requirements.

Selection Notes

Select this component for applications requiring steep roll-off characteristics in a single-supply environment. Ensure the system clock frequency allows for the desired 100:1 clock-to-corner ratio. Verify that the +5V supply voltage aligns with the MAX7408 specifications rather than the +3V variants.

Part Context

This part belongs to the MAX7408/MAX7411/MAX7412/MAX7415 family of 5th-order elliptic filters. The MAX7408 specifically denotes the +5V supply variant with a transition ratio of 1.6. Other family members include the MAX7411 (+5V, r=1.25), MAX7412 (+3V, r=1.6), and MAX7415 (+3V, r=1.25).

Replacement Considerations

Direct substitutes within the same family include the MAX7411 for similar +5V operation with a sharper rolloff (r=1.25). For +3V applications, consider the MAX7412. Cross-family replacements like the MAX291 require significant circuit redesign due to different architectures.