TDA7541 Datasheet, PDF (16/76 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system

Electrical specifications and characteristics
TDA7541
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
14.17 I_30,31 Discharge current high
14.18 V_30,31 Low voltage
14.19 V_30,31 High voltage
ISS filter switch threshold
TISS, BWDEF = 0
BWDEF = 0
BWDEF = 1
14.20 V_30,31 Threshold ISS on
14.21 V_30,31 Threshold ISS off
14.22 V_30,31 Threshold ISS narrow on
14.23 V_30,31 Threshold ISS narrow off
Deviation detection
BWDEF = 0
BWDEF = 0
BWDEF = 0
BWDEF = 0
14.24
I₃
Charge current low
14.25
I₃
Charge current high
14.26
I₃
Discharge current low
14.27
I₃
Discharge current high
14.28 DEV_WTH Internal low threshold
14.29 DEV_WTH Internal high threshold
14.30 RATIO_min Referred to threshold
14.31 RATIO_max Referred to threshold
TDEV
TDEV
TDEV
TDEV
DWTH, I₃ = 1µA
DWTH, I₃ = 1µA
DTH
DTH
15. Weak signal mute
11
15
19
µA
0.1
0.2
V
4.6 4.9
V
3
V
1
V
4
V
2
V
-40 -32 -20 µA
-48 -39 -30 µA
0.5
1
1.5 µA
5.5
8
10.5 µA
20
kHz
50
kHz
1
1.5
15.1
V₃₇ Upper start point
WMTH=0, WMD=7, V_IN=V₅₆,
AF=-3dB
2.9
V
15.2
V₃₇ Lower start point
WMTH=7, WMD=7, V_IN=V₅₆,
AF=-3dB
2.7
V
15.3 a_WMD Min. mute depth
WMD=0, WMTH=7, V₅₆ =OFF
10
14
dB
15.4 a_WMD Max. mute depth
WMD=7, WMTH=7, V₅₆=OFF
22
26
dB
15.5
a_MTHISS
Mute threshold below
WMTH for ISS filter “ON”
WMD, WMTH, V_IN=V₅₆
1
dB
15.6
V_ACMTH
Internal AC mute
threshold
ACMTH
40
260 mV
15.7 a_ACMD AC mute depth
15.8
I₄₂ Charge current
15.9
I₄₂ Discharge current
ACMD
3
8
dB
-65 -47.5 -30 μA
1.5 2.5
4
μA
16. Multiplexer output
16.1
V₂₃ Output voltage low
16.2
V₂₃ Output voltage high
0.1
0.2
V
4.6 4.9
V
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