TDA8709A Datasheet, PDF (20/28 Pages) NXP Semiconductors – Video analog input interface

Philips Semiconductors
Video analog input interface
Product specification
TDA8709A
handbook, full pagewidth
180 µH
ANOUT
(pin 19)
Vi
680 Ω
1 pF
27 pF
VCCA
(pin 22)
2.2 kΩ
27 pF
MSA677
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.18 Example of an economical low-pass filter for U and V signals.
handbook, h⁰alfpage
α
(dB)
20
MSA679
Characteristics of Fig.19
• Order 3; adapted CHEBYSHEV
• Ripple ρ ≤ 0.3 dB
• f = 2.8 MHz at −3 dB
• f_notch = 11.9 MHz.
40
60
80
0
10
20 _{f (MHz)} 30
Fig.19 Frequency response for filter shown in
Fig.18.
June 1994
20