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TDA7541B Datasheet(PDF) 19 Page - STMicroelectronics

Part # TDA7541B
Description  AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system
PDF  77 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7541B Datasheet(HTML) 19 Page - STMicroelectronics

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TDA7541B
Electrical specifications and characteristics
Doc ID 16048 Rev 1
19/77
3.3.4
Stereo decoder section
Tamb = 25 °C, VCC1 = VCC2 = VCCMIX1 = VCCVCO = VCCIF = 8.5 V, fXtal = 10.25 MHz,
VMPX = 500 mVrms mono, f = 1 kHz, de-emphasis τ = 50 µs, in application circuit, unless
otherwise specified.
24.4
gAGC
Control slope
normal mode
-
5
-
µA/V
24.5
II57I
Max. AGC charge current
Seek mode
-
125
-
μA
24.6
II57I
Max. AGC charge current
normal mode
-
5
-
μA
24.7
V57
Max. AGC output voltage
V47 = 100 dBµ
4.6
4.8
-
V
24.8
V57
Min. AGC output voltage
V47 = 20 dBµ
-
0.2
0.5
V
25. AM audio output
25.1
V43
Audio output voltage
V56 = 90 dBµ, m = 30 %,
fmod = 1KHz
170
200
230
mVRM
S
25.2
THD
Total harmonic distortion
V56 = 90 dBµ, m = 30 %,
fmod = 1 kHz
-0.3
0.5
%
25.3
V56 = 90 dBµ, m = 80%,
fmod = 1 kHz
-0.5
0.9
25.4
ROUT
Output impedance
-
20
25
30
Ω
26. IF noise blanking
26.1
tbl
Min. blanking time
-
-
8
-
μs
26.2
tbl
Max. blanking time
-
-
17
-
μs
26.3
Vth
Min internal threshold
-
-
50
-
mV
26.4
Vth
Max. internal threshold
-
-
187.5
-mV
26.5
Vthstep
Threshold step
-
-
12.5
-
mV
1.
Can be reached in application circuit, not measured.
Table 7.
AM section (continued)
Item
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
Table 8.
Stereo decoder section
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 = 100 mV, f = 1 kHz
-
60
-
dB



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