TDA7541 Datasheet, PDF (14/76 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
12.5
(S+N)/N
Signal plus noise-to-noise
ratio
Δf=1.5KHz, f_mod =1KHz, V₅₆
=100dBµ,
40
dB
In weatherband mode
Deemphasis=75µs, setting see
Table 10
13. Quality detection
Unweighted field strength (FSU) and weighted field strength
13.1
V₃₇ DC output voltage
V₅₆ = 20 dBμV, FMON=1,
FSWO = OFF
13.2
V₃₇ DC output voltage
V₅₆ = 50 dBμV, FMON=1,
FSWO = OFF
13.3
V₃₇ DC output voltage
V₅₆ = 70 dBμV, FMON=1,
FSWO = OFF
13.4
V₃₇ DC output voltage
V₅₆ > 120 dBμV, FMON=1,
FSWO = OFF
13.5
13.6
13.7
ΔV₃₇
ΔV₃₇
R_OUT
Slope
DC offset
Output impedance
13.8
V₂₇ DC output voltage
FSWO
V₅₆ = 20 dBμV, FMON=1,
SL=”101”
13.9
V₂₇ DC output voltage
V₅₆ = 50 dBμV, FMON=1,
SL=”101”
13.10 V₂₇ DC output voltage
V₅₆ = 70 dBμV, FMON=1,
SL=”101”
13.11 V₂₇ DC output voltage
V₅₆ > 120 dBμV, FMON=1,
SL=”101”
13.12
13.13
13.14
13.15
ΔV₂₇
R_OUT
R_load
V₂₇
Slope
Output impedance
Load resistor
DC output voltage AM
FSU
FSU
V₄₇ = 20 dBμV, FMON = 0,
SL= ”010”
13.16 V₂₇ DC output voltage AM
V₄₇ = 40 dBμV, FMON = 0,
SL= ”010”
13.17 V₂₇ DC output voltage AM
V₄₇ = 60 dBμV, FMON = 0,
SL= ”010”
13.18 V₂₇ DC output voltage AM
V₄₇ > 100 dBμV, FMON = 0,
SL= ”010”
13.19 ΔV₂₇ Slope AM
FMON=0
2.5
V
3
V
3.5
V
4.6
25
-200
17 23.5
0.1
V
mV/dB
0
mV
30 kΩ
0.4
V
1
V
2
V
4
50
320 400
20
0.1
V
mV/dB
480 Ω
kΩ
0.3
V
1.25
V
3.0
V
4.5
90
V
mV/dB
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