DESCRIPTION
The LTC1264-7 is a clock-tunable monolithic 8th order lowpass filter with linear passband phase and flat group delay. The amplitude response approximates a maximally flat passband and exhibits steeper roll-off than an equivalent 8th order Bessel filter. For instance, at twice the cutoff frequency the filter attains 28dB attenuation (vs 12dB for Bessel), while at three times the cutoff frequency the filter attains 55dB attenuation (vs 30dB for Bessel). The cutoff frequency of the LTC1264-7 is tuned via an external TTL or CMOS clock.

FEATURES
■ Steeper Roll-Off Than Bessel Filters
■ High Speed: fC ≤200kHz
■ Phase Equalized Filter in a 14-Pin Package
■ Phase and Group Delay Response Fully Tested
■ Transient Response Exhibits 5% Overshoot and No Ringing
■ 65dB THD or Better Throughout a 100kHz Passband
■ No External Components Needed

APPLICATIONS
■ Data Communication Filters
■ Time Delay Networks
■ Phase Matched Filters