General Description

The MAX7418–MAX7425 5th-order, low-pass, switched capacitor filters (SCFs) operate from a single +5V MAX7418–MAX7421) or +3V (MAX7422–MAX7425) supply. These devices draw only 3mA of supply current and allow corner frequencies from 1Hz to 45kHz, making them ideal for low-power post-DAC filtering and anti

aliasing applications. They feature a shutdown mode that reduces supply current to 0.2µA.

Features

♦ 5th-Order, Lowpass Filters

   Elliptic Response (MAX7418/MAX7421/ MAX7422/MAX7425)

   Bessel Response (MAX7419/MAX7423)

   Butterworth Response (MAX7420/MAX7424)

♦ Clock-Turnable Corner Frequency (1Hz to 45kHz)

♦ Single-Supply Operation

+5V (MAX7418–MAX7421)

+3V (MAX7422–MAX7425)

♦ Low Power

  3mA (Operating Mode)

  0.2µA (Shutdown Mode)

♦ Available in 8-Pin µMAX Package

♦ Low Output Offset: ±4mV

Applications

ADC Anti-Aliasing

CT2 Base Stations

DAC Postfiltering

 Speech Processing