TDA7540N Datasheet, PDF (14/76 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system (ISS)

Electrical specifications
TDA7540N
Table 6.
FM section electrical characteristics (continued)
(T_amb = 25°C, V_CC1 = V_CC2 = V_CC3 = V_CCST= V_CCVCO = V_CCMIX1 = V_CCMIX2 = V_CCIF1 = 8.5V,
f_RF = 98MHz, dev= 40kHz, f_MOD = 1kHz, f_Xtal = 10.25MHz, in application circuit, unless
otherwise specified).
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
R_IN
R_OUT
CP_1dB
IIP3
Input resistance
Output resistance
1dB compression point
3rd order Intermodulation
referred to 330Ω input
ref. to 330Ω input, 9dB gain
260
330
400
W
260
330
400
W
105
dBμV
126
dBμV
Mixer2 (450kHz)
R_IN
Input impedance
V₆₅
Max. input voltage
V₆₅
Limiting sensitivity
G
Mixer gain
S/N = 20dB
260
330
400
Ω
119
dBμV
28
dBμV
18
dB
Limiter 1 (450kHz)
G_Limiter Gain
Demodulator, audio output
80
dB
THD
V_MPX
R_OUT
|ΔV|_min
|ΔV|_max
S/N
MPX output signal
Output impedance
DC offset fine adjust
DC offset fine adjust
V_MPXW MPXW output signal
Quality detection
Dev.= 75kHz, V₆₅= 10mV_RMS
0.1
%
Dev.= 75kHz
400
500
600 mV_RMS
50
Ω
DEM, MENA=1
8.5
mV
DEM, MENA=1
264
mV
Dev.= 40kHz,V₆₅ = 10mV_RMS
76
dB
Dev.= 75kHz
280
350
420 mV_RMS
S-meter, unweighted fieldstrength
V₆₅
V₂₂
V₂₂
ΔV₂₂
ΔV₂₂
ΔV₂₂
R_OUT
T_K
Min. input voltage MIX2
Fieldstrength output
Fieldstrength output
Voltage per decade
Voltage per decade
S-meter offset
Output impedance
Coefficient temperature
V₆₅ = 20dBµV
V₆₅ = 80dBµV, SMSL = 0
SMSL = 0
SMSL = 1
SL, SMSL=1
30
dBμV
0.1
V
2.2
2.6
3.0
V
0.8
1
1.2
V
1.2
1.5
1.8
V
-15
15
dB
280
400
520
Ω
0
ppm/K
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