MAX297EWE+ (MAXIM INTEGRATED PRODUCTS)

The MAX297EWE+ from Maxim Integrated Products is an 8th-order, lowpass, elliptic, switched-capacitor filter in 16 pin WSOIC package. It is easy to use, 8th-order, lowpass, elliptic, switched-capacitor filter that can be set up with corner frequencies from 0.1Hz to 50KHz. The MAX297's 1.5 transition ratio provides sharp roll off and -80dB of stopband rejection. It has fixed response, so the design task is limited to selecting the clock frequency that controls the filter's corner frequency. An external capacitor is used to generate a clock using the internal oscillator or an external clock signal can be used. An uncommitted op amp (noninverting input grounded) is provided for building a continuous-time lowpass filter for post-filtering or anti-aliasing. Steep roll off and high order makes this filter ideal for anti-aliasing applications that require maximum bandwidth and for communication applications that require filtering signals in close proximity within frequency domain.