TDA8708A Datasheet, PDF (18/24 Pages) NXP Semiconductors – Video analog input interface

Philips Semiconductors
Video analog input interface
Product specification
TDA8708A
handbook, full pagewidth
ADOUT
(pin 19)
Vi
680 Ω
82 µH
15 pF
VCCA
(pin 22)
2.2 kΩ
15 pF
MSA678
ADCIN
(pin 20)
Vo
This filter can be adapted to various applications with respect to performance requirements. An input and output impedance of at least 680 Ω and 2.2 kΩ
must in any event be applied.
Fig.15 Example of an economical low-pass filter for CVBS and Y signals.
0
handbook, halfpage
α
(dB)
10
MSA681
Characteristics of Fig. 15
• Order 5; adapted CHEBYSHEV
• Ripple ρ ≤ 0.4 dB
• f = 6.5 MHz at −3 dB.
20
30
40
0
10
20
30
f (MHz)
Fig.16 Frequency response for filter shown in Fig.15.
June 1994
18