TDA5670-5X Datasheet, PDF (10/22 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.
Test
Condition
Test
Circuit
Switch-on, warm-up drift of oscillator frequency; T_C-value of capacitor in audio oscillator circuit
is 0, the drift is only based on self-heating of component
Audio signal
frequency deviation
AM-Audio
∆ f_A/OSC
∆ f_A/OSC
5
15
kHz T_A = const.;
1
5
10
kHz V_S = 10.0-13.5 V; 1
Q_u = 25
AM-mod. factor
m
20
30
40
%
V_AF = 45 mVrms 9
AM-mod.; total
THD_AM
harmonic distortion
0.5 3
%
m = 80%;
9
V_AF = 117 mVrms
f_AF = 1 kHz
Audio preamplifier Z₁₆
25
50
75
kΩ
1
input impedance
AM-audio modulator V_AF
input voltage
Residual carrier FM; ∆ f
AM-operation
132
mVrms m = 90%;
9
f_AF = 1 kHz
20
Hz
without AM-audio 1
signal Q_U = 25
FM-Audio
FM-mod.; total
THD_FM
harmonic distortion
0.6 1.5
FM-mod.; static
∆ f_A/OSC ± 50 ± 70 ± 90
mod. characteristic
FM-mod.; dynamic
mod. characteristic
∆ f_A/OSC/ 0.08
∆V_AF
0.10
0.13
Audio preamplifier Z₁
200
input impedance
(dynamic)
%
kHz
kHz/
mV
kΩ
V₁ = 150 mVrms 9
∆V_AF= V₁-V₂ =
1
±1V
1
1
Semiconductor Group
10