TDA7405 Datasheet, PDF (23/56 Pages) STMicroelectronics – EQUALIZER CARRADIO SIGNAL PROCESSOR

TDA7405
3 STEREODECODER-PART
3.1 Features:
s no external components necessary
s PLL with adjustment free, fully integrated VCO
s automatic pilot dependent MONO/STEREO switching
s very high suppression of intermodulation and interference
s programmable Roll-Off compensation
s dedicated RDS-Softmute
s Highcut- and Stereoblend-characterisctics programmable in a wide range
s FM/AMNoiseblanker with several threshold controls
s Multipath-detector with programmable internal/external influence
s I²C-bus control of all necessary functions
Table 3. 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
MPX Input Level
Input Resistance
Min. Input Gain
Max. Input Gain
Step Resolution
Supply Voltage Ripple Rejection
Max. Channel Separation
Input Gain = 3.5dB
V_ripple = 100mV, f = 1kHz
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
V_rms
kΩ
dB
dB
dB
dB
dB
THD
-^S-----_N^+-----N---
Total Harmonic Distortion
Signal plus Noise to Noise Ratio
f_in=1kHz, mono
A-weighted, S = 2V_rms
0.02 0.3
%
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
PLL
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
∆f/f Capture Range
0.5
%
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