TDA8722 Datasheet, PDF (16/28 Pages) NXP Semiconductors – I2C-bus programmable modulator for negative video modulation and FM sound

Philips Semiconductors
I²C-bus programmable modulator for
negative video modulation and FM sound
Application design
Product specification
TDA8722
handbook, full pagewidth
VIDEO
R20
470 Ω
R18
82 Ω
RF
100 nF
C19
75 Ω
R19
470 Ω
100 nF
C20
R15
75 Ω
100 kΩ
RV1 ⁽¹⁾
15 pF
82 kΩ
R17
100 pF
C16
C17
100 pF
C15
20
19 18
17
16
15
14 13 12 11
TDA8722
12
3
AUDIO
C1
220 pF
R1
220 kΩ
R2
12 kΩ
C3
56 pF
R3
15 kΩ
L3
15 µH
4
56
78
9 10
L5
33 pF
C5
D5
33 pF
C6
BB215
R5
22 kΩ
R6
22 kΩ
R7
150 nF
C8
R8
12 kΩ
R9
22 kΩ
10 nF
C7
12 kΩ
T8
BC547B
10 nF
C11
PORT
SCL
SDA
5V
Q9
4 MHz
27 pF
C9
33 V
C30
10 nF
MBE405
GND
(1) RV1 allows fine adjustment of the modulation depth between 70 and 90%.
Fig.8 Application using an asymmetrical output.
1998 Jun 23
16