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TDA7541 数据表(PDF) 20 Page - STMicroelectronics

部件名 TDA7541
功能描述  AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system
PDF  76 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

TDA7541 数据表(HTML) 20 Page - STMicroelectronics

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Electrical specifications and characteristics
TDA7541
20/76
Table 8.
Stereo decoder section
(Tamb=25°C, VCC1=VCC2=VCCMIX1=VCCVCO=VCCIF=8.5V, fXtal = 10.25 MHz,
VMPX=500mVrms mono, f=1kHz, deemphasis τ=50µs, in application circuit, unless otherwise
specified)
Item
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
27. Stereo decoder
27.1
Vin
MPX input level
0.5
0.93
Vrms
27.2
WBON = 1
0.05
0.06
27.3
Rin
Input resistance
80
100
120
k
Ω
27.4
GSTD
Stereo decoder gain
2
2.5
3
dB
27.5
GSTDWB Stereo decoder gain
Weather band mode
23
26
27
dB
27.6
SVRR
Supply voltage ripple
rejection
Vripple = 100mV, f = 1kHz
60
dB
27.7
A
channel separation
VMPX = 500 mVrms stereo, only
L/R, ROC adjusted
35
40
dB
27.8
THD
Total harmonic distortion
0.02
0.3
%
27.9
(S+N)/N
Signal plus noise to noise
ratio
A-weighted, 19 kHz notch
85
dB
28. Mono/stereo switch
28.1
VPTHST1 Pilot threshold voltage
for Stereo, PTH = 1
5
8
12
mVrms
28.2
VPTHST0 Pilot threshold voltage
for Stereo, PTH = 0
7
11
16
mVrms
28.3
VPTHMO1 Pilot threshold voltage
for Mono, PTH = 1
3.5
6
10
mVrms
28.4
VPTHMO0 Pilot threshold voltage
for Mono, PTH = 0
6
9
14
mVrms
29. 19kHz PLL
29.1
flock
Capture range
Pilot magnitude 20 mVrms = 4%
18.9
19.1
kHz
29.2
DP
Pilot deviation range
fpilot = 19kHz
4
30
%
30. Deemphasis and highcut
30.1
tHC50
Deemphasis time
constant
DEEMP=0, High Cut OFF
45
50
55
μs
30.2
tHC75
Deemphasis time
constant
DEEMP = 1, High Cut OFF
67
75
83
μs
30.3
tHC50
Highcut time constant
DEEMP = 0, High Cut ON,
V28=0.1V
135
150
165
μs
30.4
tHC75
Highcut time constant
DEEMP= 1, High Cut ON,
V28=0.1V
200
225
250
μs
30.5
AAmmin
Min. Attenuation in AM
Voutmax/Vout@ f = 3.5kHz,
DEEMP = 0, AMCF “111”
4.5
6.5
8.5
dB
30.6
AAmmax
Max. Attenuation in AM
Voutmax/Vout@ f = 3.5kHz,
DEEMP= 0, AMCF “000”
11
14
17
dB



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