TDA7541 Datasheet, PDF (13/76 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
10.8 G_max Max. gain
10.9
INOISE
Equivalent input noise
voltage
10.10
10.11
CP_1dB
IIP3
1dB compression point
3^rd order Intermodulation
11. Mixer2 (450kHz)
IFG
G_max , R_gen=330Ω, R_L=330Ω,
noise of R_gen not included
referred to 330Ω input, G_max
referred to 330Ω input, G_max
21
dB
3.2
nV/√Hz
99
dBµV
130
dBµV
11.1
R_IN Input resistance
11.2
C_IN Input capacitance
11.3 V_55.56 DC input voltage
11.4 R_OUT Output resistance
11.5 C_OUT Output capacitance
11.6 V_52,53 DC output voltage
11.7
g_m
Conversion
transconductance
Differential
240 300
2.5
3.7
4
100
2.5
3.7
4
WB Mode; referred to MIX2OUT
126
360 Ω
pF
4.3
V
kΩ
pF
4.3
V
µA/V
11.8
G Gain
FM Mode, referred to MIX2OUT
14
dB
11.9
11.10
11.11
C_step
C_max
INOISE
Min. cap. Step
Max. cap.
Equivalent input noise
voltage,
including buffer mixer2
IF2A
IF2A
R_gen=330Ω, IF2Q”10”
noise of R_gen not included
2.2
pF
33
pF
15
nV/√Hz
11.12 CP_1dB 1dB compression point referred to 330Ω input ,IF2Q”10”
116
11.13 IIP3 3^rd order Intermodulation referred to 330Ω input ,IF2Q”10”
132
dBμV
dBμV
12. Demodulator, audio output
12.1
THD
Total harmonic distortion
Dev.= 75kHz, V₅₆=
100dBµV,IF2Q”11”
0.1
a_AM AM suppression
V₅₆ =100dBµ, Δf=40KHz, f_mod
=1KHz,
40
60
f_mod =1KHz@AM, m=0.3%
12.2 V_MPX MPX output signal
Dev.= 75kHz
440 500
12.3 R_OUT Output impedance
20
40
R_LOAD Load resistance
10
Δf=40KHz, f_mod =1KHz, V₅₆
=100dBµV,
12.4
(S+N)/N
Signal plus noise-to-noise _{Deemphasis=50µs,}
ratio at MPXOUT
70
B=200Hz to 15KHz
ISSENA = 0
0.3
%
dB
560 mV_RMS
60
Ω
kΩ
dB
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