The filter does not require any external active components such as input/output buffers. The input/output impedance is 500M/0.1 and the output of the filter can source or sink 40mA. When pin 8 is connected to V +, the clock-tocutoff frequency ratio is 50:1 and the input signal is sampled twice per clock cycle to lower the risk of aliasing. For frequencies up to 0.75fCUTOFF, the passband ripple is 0.15dB. The gain at fCUTOFF is 1dB and the filter's stopband attenuation is 80dB at 2.3fCUTOFF. Linear phase operation is also available with a clock-to-cutoff frequency ratio of 100:1 when pin 8 is connected to ground.