AH844 - Faraday Technology

AH844
FULLY BUFFERED NTSC POST FILTER
The AH844 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.
Filter Shape
Lowpass
Passband Shape
Sinx/x
Sampling Frequency
14.318 MHz
Gain
- 0.2 dB + 0.2 dB
+5.8 dB + 0.2 dB
End Of Passband
4.4 MHz
Passband Amplitude Ripple
0.25 dB max
Loss at 6.75 MHz wrt 4.4 MHz
30 dB + 2 dB
Start Of Stopband
7.0 MHz
Stopband Attenuation wrt 4.4 MHz
Group Delay Ripple wrt 200 kHz
40 dB min to 20 MHz
35 dB min to 50 MHz
+ 10.0 ns max to 4.3 MHz
Delay Time at 200 kHz
340 ns + 10 ns
Typical Current
30 mA (15 mA per rail at + 5 v)
Input Impedance
2 MΩ typical
Package
DR00032A
with pin 6 open
with pin 6 gnd
© Faraday Technology. As part of continual product improvement the specifications, details and dimensions shown in this publication are subject to change without notice
FARA024.DOC
Page 1 of 2
Jun-99(A)
PACKAGE DETAIL
Faraday Technology Ltd.
Croft Road Industrial Estate,
Newcastle, Staffordshire
ST5 0QZ. England.
FARA024.DOC
Tel:
Fax:
Email:
Web site:
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+ 44 (0)1782 661501
+ 44 (0)1782 630101
[email protected]
http://www.faradaytech.co.uk
Jun-99(A)