ML6425

February 1997 PRELIMINARY ML6424*/ML6425* CCIR601 Video Lowpass Filter with Optional Sinx/x Correction GENERAL DESCRIPTION The ML6424 is a monolithic BiCMOS Video Lowpass Filter IC, incorporating a 5th order Elliptic (Cauer) lowpass filter, a third order allpass filter, and a 75Ω coax cable driver. The ML6425 additionally provides sinx/x amplitude correction. These active lowpass filters are available with a 2.75MHz (-2) or a 5.50MHz (-1) cutoff frequency. The input signal can be either AC or DC coupled under the control of the MODE pin. In the DC coupled case, a control pin (RANGE) is provided to allow the inputs to swing down to ground. Internal self clamping is provided for AC coupled signals. The ML6424 and ML6425 are powered by a single 5V supply, and can drive 1VPP into 75Ω (0.5V to 1.5V), or 2VPP into 150Ω (0.5 to 2.5V). The maximum output swing from 0.5V to 2.5V allows easy interface to the ML6400 family of A/D converters. FEATURES s External or internal input clampin...