TDA7402_00 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA7402_00' PDF : 59 Pages View PDF
TDA7402
1.16 Audioprocessor Testing
During the Testmode, which can be activated by setting bit D0 of the stereodecoder testing-byte and the audio-
processor testing byte, several internal signals are available at the FD2R- pin. During this mode the input re-
sistance of 100kOhm is disconnected from the pin. The internal signals available are shown in the Data-byte
specification.
2.0 STEREODECODER PART
2.1 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
2.2 ELECTRICAL CHARACTERISTICS
VS = 9V, deemphasis time constant = 50µs, MPX input voltage VMPX = 500mV (75kHz deviation), modulation
frequency = 1kHz, input gain = 6dB, Tamb = 27°C, unless otherwise specified.
Symbol
Parameter
Test Conditio n
Min. Typ. Max. Unit
Vin MPX Input Level
Input Gain = 3.5dB
0.5
1.25 Vrms
Rin Input Resistance
100
kΩ
Gmin Min. Input Gain
3.5
dB
Gmax Max. Input Gain
11
dB
Gstep Step Resolution
2.5
dB
SVRR Supply Voltage Ripple Rejection Vripple = 100mV, f = 1kHz
60
dB
a
Max. Channel Separation
50
dB
THD Total Harmonic Distortion
fin=1kHz, mono
0.02 0.3
%
S+N
N
Signal plus Noise to Noise Ratio A-weighted, S = 2Vrms
91
dB
MONO /STEREO-S WITCH
VPTHST1 Pilot Threshold Voltage
VPTHST0 Pilot Threshold Voltage
VPTHMO1 Pilot Threshold Voltage
for Stereo, PTH = 1
for Stereo, PTH = 0
for Mono, PTH = 1
15
mV
25
mV
12
mV
25/59
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