TDA8722 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
TDA8722 Datasheet PDF : 28 Pages
| |||
Philips Semiconductors
I2C-bus programmable modulator for
negative video modulation and FM sound
Product specification
TDA8722
CHARACTERISTICS
VDDA = VDDD = 5 V; Tamb = 25 °C; valid over the whole UHF band; measured in circuit of Fig.7;
unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Supply
IDD
supply current
normal mode
RF off test mode
41
52
63
mA
30
38
46
mA
Video characteristics
I19
input current (AC)
z19
video input impedance
m
modulation depth
V19 = 3.2 V
−
0.5
V19 = 3.2 V
30
−
V19 = 500 mV (p-p) EBU 77
82
colour bars; R17 = 120 kΩ;
see Fig.7
during clipping condition; 85
−
note 1
∆m
modulation depth range
TPSG mode;
R17 = 120 kΩ
72
82
balance test mode;
R17 = 120 kΩ
110 −
V19 = 500 mV (p-p) EBU 65
−
colour bars;
47 kΩ ≤ R17 ≤ ∞
∆mAPL variation of modulation depth with
referenced to the value for −2
−
change of APL between 10 and 90% APL = 50%;
V19 = 500 mV (p-p)
Vclip(p-p) video input level where clipping starts video level on pin 19;
−
0.56
(peak-to-peak value)
note 2
S/N video video signal-to-noise ratio
Gdiff
differential gain
φdiff
differential phase
V/S
video-to-sync ratio
fRF < 700 MHz; note 3
fRF > 700 MHz; note 3
note 4
note 4
V19 = 500 mV (p-p);
V/S = 7/3
48
52
46
50
−8
−
−8
−
6.9/3.1 7/3
fvideo
frequency response for the video signal note 5
−1
−
Audio characteristics (for PAL G standard; audio subcarrier at 5.5 MHz)
Z1
audio input impedance
δm
modulation deviation
30
−
f1 = 400 Hz;
20
25
V1 = 0.5 V (RMS) before
pre-emphasis filter
δmmax
maximum modulation deviation
f1 = 400 Hz;
60
85
V1 = 2.0 V (RMS) before
pre-emphasis filter
THD
total harmonic distortion
f1 = 1 kHz;
−
0.4
V1 = 0.5 V (RMS) before
pre-emphasis filter
2.0
µA
−
kΩ
87
%
98
%
92
%
−
%
90
%
+2
%
−
V
−
dB
−
dB
+8
%
+8
deg
7.1/2.9
+1
dB
−
kΩ
30
kHz
−
kHz
1.5
%
1998 Jun 23
10
|
|
Share Link: 