TDA7402_07 Datasheet, PDF (32/71 Pages) STMicroelectronics – Car radio signal processor

Stereo decoder part
5
Stereo decoder part
TDA7402
5.1
Features:
● No external components necessary
● PLL with adjustment free, fully integrated VCO
● Automatic pilot dependent MONO/STEREO switching
● Very high suppression of intermodulation and interference
● Programmable roll off compensation
● Dedicated RDS-softmute
● Highcut and stereo blend-characterisctics programmable in a wide range
● FM/AM noiseblanker with several threshold controls
● Multipath-detector with programmable internal/external influence
● I²C-bus control of all necessary functions
5.2
Electrical characteristics
V_S = 9V, de-emphasis time constant = 50µs, MPX input voltage V_MPX = 500mV (75kHz
deviation), modulation frequency = 1kHz, input gain = 6dB, T_amb = 27°C, unless otherwise
specified.
Table 7. Electrical characteristics
Symbol
Parameter
V_in
R_in
G_min
G_max
G_step
SVRR
a
MPX input level
Input resistance
Min. input gain
Max. input gain
Step resolution
Supply voltage ripple rejection
Max. channel separation
THD Total harmonic distortion
S +N _{Signal plus noise to noise ratio}
N
Mono/Stereo-switch
V_PTHST1
V_PTHST0
V_PTHMO1
V_PTHMO0
Pilot threshold voltage
Pilot threshold voltage
Pilot threshold voltage
Pilot threshold voltage
PLL
Δf/f Capture range
Test condition
Input gain = 3.5dB
V_ripple = 100mV, f = 1kHz
f_in=1kHz, mono
A-weighted, S = 2V_rms
Min.
70
1.5
8.5
1.75
30
Typ.
0.5
100
3.5
11
2.5
55
50
0.02
Max.
1.25
130
4.5
12.5
3.25
0.3
Unit
V_rms
kΩ
dB
dB
dB
dB
dB
%
80
91
dB
for stereo, PTH = 1
for stereo, PTH = 0
for mono, PTH = 1
for mono, PTH = 0
10
15
25
mV
15
25
35
mV
7
12
17
mV
10
19
25
mV
0.5
%
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