TDA7405_04 Datasheet, PDF (23/57 Pages) STMicroelectronics – EQUALIZER CARRADIO SIGNAL PROCESSOR

TDA7405
6 STEREODECODER-PART
6.1 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-characterisctics programmable in a wide range
■ FM/AMNoiseblanker with several threshold controls
■ Multipath-detector with programmable internal/external influence
■ I²C-bus control of all necessary functions
Table 7. ELECTRICAL CHARACTERISTICS
V_S = 9V, deemphasis time constant = 50µs, MPX input voltage V_MPX = 500mV (75kHz deviation),
modulation frequency = 1kHz, input gain = 6dB, T_amb = 27°C, unless otherwise specified.
Symbol
Parameter
Test Conditions
Min. Typ. Max.
Unit
V_in
R_in
G_min
G_max
G_step
SVRR
α
THD
S_------N+-----N_---
MPX Input Level
Input Resistance
Min. Input Gain
Max. Input Gain
Step Resolution
Supply Voltage Ripple Rejection
Max. Channel Separation
Total Harmonic Distortion
Signal plus Noise to Noise Ratio
Input Gain = 3.5dB
V_ripple = 100mV, f = 1kHz
f_in=1kHz, mono
A-weighted, S = 2V_rms
0.5 1.25
70
100 130
1.5
3.5
4.5
8.5
11 12.5
1.75 2.5 3.25
55
30
50
0.02 0.3
80
91
V_rms
kΩ
dB
dB
dB
dB
dB
%
dB
MONO/STEREO-SWITCH
V_PTHST1 Pilot Threshold Voltage
V_PTHST0 Pilot Threshold Voltage
V_PTHMO1 Pilot Threshold Voltage
V_PTHMO0 Pilot Threshold Voltage
PLL
∆f/f Capture Range
DEEMPHASIS and HIGHCUT
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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