AH844

The AH844 is designed as one kind of fully buffered NTSC post filter device that is a low cost post D-A filter designed to complement the AH842 pre filter for NTSC applications using the 4 x FSC oversampled format. Interfacing to the system is simplified with high input and low output impedance op-amp buffer stages.

The absolute maximum ratings of the AH844 can be summarized as:(1)Filter Shape Lowpass; (2)Passband Shape Sinx/x; (3)Sampling Frequency 14.318 MHz; (4)End Of Passband 4.4 MHz; (5)Passband Amplitude Ripple 0.25 dB max; (6)Loss at 6.75 MHz wrt 4.4 MHz 30 dB + 2 dB; (7)Start Of Stopband 7.0 MHz; (8)Stopband Attenuation wrt 4.4 MHz 40 dB min to 20 MHz; (9)Delay Time at 200 kHz 340 ns +/- 10 ns; (10)Typical Current 30 mA (15 mA per rail at +/- 5 v); (11)Input Impedance 2 MW typical; (12)Aqueous Washable Yes; (13)Package DR00032A. If you want to know more information such as the electrical characteristics about the AH844, please download the datasheet in www.seekic.com or www.chinaicmart.com.