700-MAX7427EUA

The MAX7426/MAX7427 5th-order, lowpass, elliptic,

switched-capacitor filters (SCFs) operate from a single

+5V (MAX7426) or +3V (MAX7427) supply. The devices

draw only 0.8mA of supply current and allow corner frequencies

from 1Hz to 12kHz, making them ideal for

low-power post-DAC filtering and anti-aliasing applications.

They can be put into a low-power mode, reducing

supply current to 0.2?A.

Two clocking options are available: self-clocking (through

the use of an external capacitor) or external clocking for

tighter cutoff-frequency control. An offset-adjust pin

allows for adjustment of the DC output level.

The MAX7426/MAX7427 deliver 37dB of stopband

rejection and a sharp rolloff with a transition ratio of

1.25. Their fixed response limits the design task to

selecting a clock frequency.