TDA7411 Datasheet, PDF (17/43 Pages) STMicroelectronics – ADVANCED CAR SIGNAL PROCESSOR

TDA7411
STEREODECODER PART
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-Soft mute
– High cut- and Stereo blend-characteristics programmable in a wide range
– internal Noise blanker with several threshold controls
– alternative frequency search function
– Multipath-detector with programmable internal/external influence
– I²C-bus control of all necessary functions
.
ELECTRICAL CHARACTERISTICS
(V_S = 8V; deemphasis time constant = 50µs,V_MPX = 500mV(75KHz deviation), fm= 1KHz, Gv = 6dB,
T_amb = 27°C; unless otherwise specified)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
V_in MPX Input Level
G_v = 3.5dB
0.5
1.25 V_RMS
R_in Input Resistance
70
100 130
KΩ
G_MIN Min. Input Gain
1.5
3.5
4.5
dB
GMAX Max. Input Gain
8.5
11 12.5 dB
GSTEP Step Resolution
1.75 2.5 3.25 dB
SVRR Supply Voltage Ripple Rejection Vripple = 100mV; f = 1KHz
35
60
dB
α
Max. channel Separation
30
50
dB
THD Total Harmonic Distortion
0.02 0.3
%
-^S-----+-----^N--- ^{Signal plus Noise to Noise Ratio A-weighted, S = 2VRMS}
80
91
dB
N
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
t_HC50 Deemphasis Time Constant
t_HC75 Deemphasis Time Constant
t_HC50 Highcut Time Constant
t_HC75 Highcut Time Constant
for Stereo, PTH = 1
for Stereo, PTH = 0
for Mono, PTH = 1
for Mono, PTH = 1
Bit 7, Subadr, 10 = 0,
V_LEVEL >> V_HCH
Bit 7, Subadr, 10 = 1,
V_LEVEL >> V_HCH
Bit 7, Subadr, 10 = 0,
V_LEVEL >> V_HCL
Bit 7, Subadr, 10 = 1,
V_LEVEL >> V_HCL
10
15
25
mV
15
25
35
mV
7
12
17
mV
10
19
25
mV
0.5
%
25
50
75
µs
50
75
100
µs
100 150 200
µs
150 225 300
µs
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