tda5670-5x ETC-unknow, tda5670-5x Datasheet - Page 8

• Manufacturer Part Number: tda5670-5x
• Description: Video Modulator Fm/am-audio With Pll-output
• Manufacturer: ETC-unknow

AC/DC-Characteristics (cont’d)
T
Parameter
Unmodulated video and audio carrier, measured with the spectrum analyzer as difference
between video carrier signal level and sideband signal level; loaded Q factor Q
oscillator resonance circuit adjusted by R
12.5 dB; Q
Video to audio
carrier ratio
Harmonic wave ratio
Harmonic wave ratio
All remaining harmonic waves; multiple of fundamental wave of video carrier, without video
signal, measured with spectrum analyzer; f
Residual carrier
suppression
Signal-to-noise in
video; unmodulated
audio carrier
Interference product
ratio audio in video
AM-modulation
FM-modulation of
audio carrier
Unweighted AM-
Unweighted FM-
interference level
ratio video in audio
Signal-to-noise ratio
of audio oscillator
Video
Video input current
at pin 12
Video input voltage
at pin 12
Semiconductor Group
A
= 25
o
C; V
U
= 25
S
= 12 V
Symbol
–I
V
12
V/A
O
O
R
N/V
A/V
A/V
V/A
V/A
N/A
N/A
12
min.
10
35
42
15
32
48
49
48
48
48
48
48
0
0.7
Limit Values
P
typ.
12.5
48
48
74
62
60
54
54
54
54
to provide the required video to audio carrier ratio of
VC
= 523.25-623.25 MHz; pin 14 open
8
max.
15
1
1.4
Unit
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Vpp
A
Test
Condition
f
f
(11 MHz)
f
(16.5 MHz)
Ch 30...40
Ch 30...40
Ch 30...40,
Ch 30...40
m
Ch 39; test
picture FuBK
Ch 39; test
picture FuBK
AM unmodulated
FM-audio carrier
C
C
VC
VC
VC
12
12
A
+f
= 90%
+ 2 f
+ 3 f
AC
100 nF
100 nF
AC
AC
(5.5 MHz) 1
L
of the audio
TDA 5670-5X
Test
Circuit
1
1
1
3
4
4
4
5
5
5
5
1
1