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參數(shù)資料
| 型號(hào)： | TDA8722M-T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| 文件頁數(shù)： | 2/28頁 |
| 文件大?。?/td> | 155K |
| 代理商： | TDA8722M-T |
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1998 Jun 23
10
Philips Semiconductors
Product specication
I2C-bus programmable modulator for
negative video modulation and FM sound
TDA8722
CHARACTERISTICS
VDDA =VDDD =5V; Tamb =25 °C; valid over the whole UHF band; measured in circuit of Fig.7;
unless otherwise specied.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
IDD
supply current
normal mode
41
52
63
mA
RF off test mode
30
38
46
mA
Video characteristics
I19
input current (AC)
V19 = 3.2 V
0.5
2.0
A
z19
video input impedance
V19 = 3.2 V
30
k
m
modulation depth
V19 = 500 mV (p-p) EBU
colour bars; R17 = 120 k
;
see Fig.7
77
82
87
%
during clipping condition;
note 1
85
98
%
TPSG mode;
R17 = 120 k
72
82
92
%
balance test mode;
R17 = 120 k
110
%
m
modulation depth range
V19 = 500 mV (p-p) EBU
colour bars;
47 k
≤ R17 ≤∞
65
90
%
m
APL
variation of modulation depth with
change of APL between 10 and 90%
referenced to the value for
APL = 50%;
V19 = 500 mV (p-p)
2
+2
%
Vclip(p-p)
video input level where clipping starts
(peak-to-peak value)
video level on pin 19;
note 2
0.56
V
S/N video video signal-to-noise ratio
fRF < 700 MHz; note 3
48
52
dB
fRF > 700 MHz; note 3
46
50
dB
Gdiff
differential gain
note 4
8
+8
%
φ
diff
differential phase
note 4
8
+8
deg
V/S
video-to-sync ratio
V19 = 500 mV (p-p);
V/S = 7/3
6.9/3.1
7/3
7.1/2.9
fvideo
frequency response for the video signal
note 5
1
+1
dB
Audio characteristics (for PAL G standard; audio subcarrier at 5.5 MHz)
Z1
audio input impedance
30
k
δm
modulation deviation
f1 = 400 Hz;
V1 = 0.5 V (RMS) before
pre-emphasis lter
20
25
30
kHz
δmmax
maximum modulation deviation
f1 = 400 Hz;
V1 = 2.0 V (RMS) before
pre-emphasis lter
60
85
kHz
THD
total harmonic distortion
f1 = 1 kHz;
V1 = 0.5 V (RMS) before
pre-emphasis lter
0.4
1.5
%
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