TDA8822T Ver la hoja de datos (PDF) - Philips Electronics
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TDA8822T Datasheet PDF : 28 Pages
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Philips Semiconductors
Universal I2C-bus programmable RF
modulator
Preliminary specification
TDA8822
CHARACTERISTICS
VCCA = VCCD = 5 V; Tamb = 25 °C; in PAL B/G, PAL I, PAL D/K, or NTSC; MD setting = 4; DEV setting = 2;
PS setting = 1; video input signal = 500 mV (p-p) EBU colour bars; audio input signal = 45 mV (p-p) 1 kHz sine wave;
unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Supply
IP
power supply current
Video characteristics
IVIDEO
zVIDEO
md
video input current
video input impedance
modulation depth
md(clip)
md(TPSG)
md(APL)
S/N
Gdiff
ϕdiff
V/S
fvideo
modulation depth during clipping
condition
modulation depth when TPSG mode
on
variation of the modulation depth with
change of APL between 10 and 90%
video signal-to-noise ratio
differential gain
differential phase
video-to-sync ratio
frequency response for the video
signal
analog and digital parts
part-to-part variation;
MD setting = 4
video input level lower
than 1 V (p-p)
part to part variation,
MD setting = 4
reference for APL = 50%
note 1
note 2
note 2
input signal: V/S = 7 : 3
note 3
−
60
−
0.5
30
−
77.5
82.5
−
−
72.5
82.5
−2
0
48
52
−
3
−
3
6.9 : 3.1 7 : 3
−1
−
72
mA
2.0
µA
−
kΩ
87.5
%
99
%
92.5
%
+2
%
−
dB
6
%
6
deg
7.1 : 2.9
+1
dB
Audio characteristics
ZAUDIO
audio input impedance
without any resistor
30
−
−
kΩ
between AUDIO and
AGND
∆fm
modulation deviation
SC setting = 1, 2 or 3; 20
25
30
kHz
DEV setting = 2
SC setting = 0;
DEV setting = 2
10
12.5 15
kHz
∆fm(max) maximum modulation deviation
VAUDIO = 500 mV (p-p); 180
250 −
kHz
note 4
THD
total harmonic distortion
50 mV (p-p) sine wave at −
1 kHz on AUDIO pin
0.4 1.0
%
S/N
audio signal-to-noise ratio
note 5
44
47
−
dB
fAUDIO
frequency response of the audio signal note 6
−1
−
+1
dB
∆fsc(acc)
sound subcarrier accuracy
note 7
−1
0
+1
kHz
P/S
picture-to-sound ratio
no audio signal; no video −15
−12 −9
dB
signal; PS setting = 1
1997 Jan 08
14
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