TDA7406 Datasheet, PDF (27/64 Pages) STMicroelectronics – Car radio signal processor

TDA7406
5
Stereodecoder part
Stereodecoder part
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 Stereoblend-characteristics 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
Stereodecoder electrical characteristics
Table 5.
Symbol
Stereodecoder electrical characteristics
V_S = 9V, de-emphasis time constant = 50µs, MPX input voltage VMPX = 500mV (75kHz
deviation), modulation frequency = 1kHz, input gain = 6dB, T_amb = 27°C, unless
otherwise specified.
Parameter
Test Conditions
Min. Typ. Max.
Unit
V_in
R_in
G_min
G_max
G_step
SVRR
a
THD
MPX Input Level
Input Gain = 3.5dB
Input Resistance
Min. Input Gain
Max. Input Gain
Step Resolution
Supply Voltage Ripple Rejection V_ripple = 100mV, f = 1kHz
Max. Channel Separation
Total Harmonic Distortion
f_in=1kHz, mono
0.5 1.25
70 100 130
1.5 3.5 4.5
8.5
11 12.5
1.75 2.5 3.25
60
30
50
0.02 0.3
V_rms
kΩ
dB
dB
dB
dB
dB
%
-^S-----+-----^N---
N
Signal plus Noise to Noise Ratio A-weighted, S = 2V_rms
80
91
dB
MONO/STEREO-SWITCH
V_PTHST1 Pilot Threshold Voltage
V_PTHST0 Pilot Threshold Voltage
V_PTHMO1 Pilot Threshold Voltage
V_PTHMO0 Pilot Threshold Voltage
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
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