TDA7541 Datasheet, PDF (15/76 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system

TDA7541
Electrical specifications and characteristics
Table 6. FM section (continued)
(T_amb = 25°C, V_CC1 = V_CC2 = V_CCMIX1 = V_CCVCO = V_CCIF = 8.5V, f_Xtal = 10.25 MHz,
f_RF = 98MHz, dev = 40 kHz, f_Mod = 1 kHz, in application circuit, unless otherwise specified)
Item Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
13.20
f_LP
-3dB frequency low pass
AM
FMON=0
Adjacent channel gain
13.21 G_AC Gain
Adjacent channel filter
13.22 f_HP -3dB frequency highpass
13.23 f_-20dB Attenuation 20dB
13.24 f_BP Centre frequency
Multipath channel gain
ACF=0
ACF=1
13.25 G_MP Gain
Multipath bandpass filter
13.26
f_C
Centre frequency
13.27
Q
Quality factor
40
kHz
32
dB
100
kHz
70
kHz
100
kHz
12
dB
19
kHz
5
8
10
14. ISS (intelligent selectivity system) filter 450kHz
14.1 f_centre Centre frequency
14.2 BW 3dB Bandwidth, -3dB
f_{REF_intern} = 450kHz
ISSBW = 1
14.3 BW 20dB Bandwidth, -20dB
ISSBW = 1
14.4 BW 3dB Bandwidth, -3dB
ISSBW = 0
14.5 BW 20dB Bandwidth, -20dB
ISSBW = 0
14.6 BW 3dB Bandwidth weather band WBON = 1
14.7 BW 20dB -20dB weather band
WBON = 1
Adjacent channel ISS filter threshold
14.8 V_THAC Internal low threshold
14.9 V_THAC Internal high threshold
Multipath threshold
ACTH
ACTH
14.10 V_THMP Internal low threshold
14.11 V_THMP Internal high threshold
ISS filter time constant
MPTH
MPTH
14.12
14.13
14.14
14.15
I_30,31
I_30,31
I_30,31
I_30,31
Charge current low mid TISS, BWDEF = 1
Charge current high mid TISS, BWDEF = 1
Charge current low narrow TISS, BWDEF = 1
Charge current high
narrow
TISS, BWDEF = 1
14.16 I_30,31 Discharge current low
TISS, BWDEF = 0
450
70
80
132 150
106 120
220 250
18
22
tbd
kHz
90 kHz
168 kHz
135 kHz
280 kHz
26 kHz
kHz
2.75
V
3.05
V
0.50
V
1.25
V
-89 -74 -59 µA
-72 -60 -48 µA
-148 -124 -99 µA
-132 -110 -88 µA
0.5
1
1.5 µA
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