TDA5670-5X Datasheet, PDF (9/22 Pages) Siemens Semiconductor Group – Video Modulator for FM/AM-Audio with PLL-Output

TDA 5670-5X
AC/DC-Characteristics (cont’d)
T_A = 25 ^oC; V_S = 12 V
Parameter
Symbol
Limit Values
Unit
min. typ. max.
Modulation depth m_D/N
60
70
80
%
Stability of mod.
∆m_D
depth
∆m_D
1
± 2.5 %
1
± 2.5 %
Test
Condition
Test
Circuit
staircase signal at 6
video input;
V_Video = 1 Vpp
∆V_Video = 1 Vpp 6
± 3 dB;
T_A = 0-60 ^oC
6
∆m_D
Differential gain
α_dif
Differential phase Φ_dif
1
± 2.5 %
V_S = 10-13.5 V
6
10
%
7
15
deg measured with 7
measurement
demodulator,
video test signals
and vector scope
Amplitude response of video signal; V_Video = 1 Vpp with additional modulation f = 15 kHz-5MHz
sine signal between black and white
α_V
0
1.5
dB
8
Period of time required for peak white detector to reach steady state for full modulation depth with
1-white pulse per half frame when control is already in the steady state
t
6
50
µs
C at pin 13 =
1
10 µF;
I _leakage ≤ 2 µA
Setting time for video signal change from 0 Vpp to 1.4 Vpp; video blanking signal content is
uniform white level
t
120 500 µs
1
Setting time for video blanking signal from 100% white level to 42% grey level with subsequent
rise in grey level to 71% of video blanking signal (due to decontrol process)
t
0.4 2
10
min
1
Audio
Audio oscillator frequency range; unloaded Q factor of resonance circuit Q_u = 25;
f_resonance = 5.5 MHz
f_A/OSC
4
7
MHz
1
Semiconductor Group
9