TDA8722 Philips Semiconductors, TDA8722 Datasheet - Page 10

• Manufacturer Part Number: TDA8722
• Description: I2C-bus programmable modulator for negative video modulation and FM sound
• Manufacturer: Philips Semiconductors

Philips Semiconductors
CHARACTERISTICS
V
unless otherwise specified.
1998 Jun 23
Supply
I
Video characteristics
I
z
m
V
S/N video video signal-to-noise ratio
G
V/S
f
Audio characteristics (for PAL G standard; audio subcarrier at 5.5 MHz)
Z
THD
SYMBOL
DD
19
video
DDA
19
m
m
diff
m
m
1
clip(p-p)
I
negative video modulation and FM sound
diff
2
max
APL
C-bus programmable modulator for
= V
DDD
supply current
input current (AC)
video input impedance
modulation depth
modulation depth range
variation of modulation depth with
change of APL between 10 and 90%
video input level where clipping starts
(peak-to-peak value)
differential gain
differential phase
video-to-sync ratio
frequency response for the video signal
audio input impedance
modulation deviation
maximum modulation deviation
total harmonic distortion
= 5 V; T
amb
= 25 C; valid over the whole UHF band; measured in circuit of Fig.7;
PARAMETER
normal mode
RF off test mode
V
V
V
colour bars; R17 = 120 k ;
see Fig.7
during clipping condition;
note 1
TPSG mode;
R17 = 120 k
balance test mode;
R17 = 120 k
V
colour bars;
47 k
referenced to the value for
APL = 50%;
V
video level on pin 19;
note 2
f
f
note 4
note 4
V
V/S = 7/3
note 5
f
V
pre-emphasis filter
f
V
pre-emphasis filter
f
V
pre-emphasis filter
RF
RF
1
1
1
19
19
19
19
19
19
1
1
1
= 400 Hz;
= 400 Hz;
= 1 kHz;
10
= 0.5 V (RMS) before
= 2.0 V (RMS) before
= 0.5 V (RMS) before
< 700 MHz; note 3
> 700 MHz; note 3
= 3.2 V
= 3.2 V
= 500 mV (p-p) EBU
= 500 mV (p-p) EBU
= 500 mV (p-p)
= 500 mV (p-p);
CONDITIONS
R17
41
30
30
77
85
72
110
65
48
46
6.9/3.1 7/3
30
20
60
2
8
8
1
MIN.
52
38
0.5
82
82
0.56
52
50
25
85
0.4
TYP.
Product specification
TDA8722
63
46
2.0
87
98
92
90
+2
+8
+8
7.1/2.9
+1
30
1.5
MAX.
mA
mA
k
%
%
%
%
%
%
V
dB
dB
%
deg
dB
k
kHz
kHz
%
UNIT
A