AH842
FULLY BUFFERED NTSC PRE FILTER
The AH842 is a low cost pre A/D filter designed to complement the AH844 post 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
Passband Shape
Gain
End Of Passband
Passband Amplitude Ripple
Loss at 6.75 MHz wrt 100 kHz
Start of Stopband
Stopband Attenuation wrt 100 kHz
Group Delay Ripple wrt 200 kHz
Delay Time at 200 kHz
Typical Current
Input Impedance
Package
Lowpass
Flat
- 0.2 dB + 0.2 dB
+5.8 dB + 0.2 dB
4.4 MHz
0.25 dB max
30 dB + 2 dB
7.0 MHz
40 dB min to 20 MHz
35 dB min to 50 MHz
+ 10.0 ns max to 4.3 MHz
344 ns + 10 ns
30 mA (15 mA per rail at + 5 v)
2 MΩ typical
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
FARA023.DOC
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Jun-99(A)
PACKAGE DETAIL
Faraday Technology Ltd.
Croft Road Industrial Estate,
Newcastle, Staffordshire
ST5 0QZ. England.
FARA023.DOC
Tel:
Fax:
Email:
Web site:
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+ 44 (0)1782 661501
+ 44 (0)1782 630101
sales@faradaytech.co.uk
http://www.faradaytech.co.uk
Jun-99(A)