TDA7541 Datasheet, PDF (18/76 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system

Electrical specifications and characteristics
TDA7541
Table 7. AM 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 = 1
MHz, m = 30%, f_mod = 1 kHz, in application circuit, unless otherwise specified)
Item Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
21. AM mixer2
21.1
21.2
21.3
21.4
21.5
21.6
R_IN
C_IN
V_55.56
R_OUT
C_OUT
V_52,53
21.7
g_m
Input resistance
Input capacitance
DC input voltage
Output resistance
Output capacitance
DC output voltage
Conversion
transconductance
21.8 G_max Max. gain
21.9
ΔG Gain control range
21.10
21.11
21.12
C_step
C_max
INOISE
Min. cap. Step
Max. cap.
Equivalent input noise
voltage,
including buffer mixer2
21.13
21.14
CP_1dB
IIP3
1dB compression point
3^rd order Intermodulation
22. Buffer AM mixer2
22.1 R_OUT Output resistance
22.2 C_OUT Output capacitance
22.3
V₅₀ DC output voltage
22.4
G gain
23. AM IF2 amplifier
23.1
R_IN Input resistance
23.2
C_IN Input capacitance
23.3 V_44,47 DC input voltage
23.4 G_max Max. gain
23.5
ΔG Gain control range
23.6
INOISE
Equivalent input noise
voltage
23.7 CP_1dB 1dB compression point
23.8
IIP3 3^rd order Intermodulation
MIX2OUT
L=560µH, Q=28;
C=180p,referred to MIX2OUT
IF2A
IF2A
A_max , R_gen=330Ω, R_L=2kΩ,
noise of R_gen not included
A_max , referred to 330Ω input
A_max , referred to 330Ω input
R_L=2kΩ
G_max , R_gen=2KΩ,
noise of R_gen not included
G_max , referred to 2KΩ input
G_max , referred to 2KΩ input
265 330 396
Ω
2.5
pF
3.8
4
4.2
V
100
kΩ
2.5
pF
3.7 4.0 4.3
V
440
µA/V
26
dB
20
dB
2.2
pF
33
pF
11
nV/√Hz
114
dBμV
132
dBμV
1.6
2
2.4 kΩ
2.5
pF
3.7 4.0 4.3
V
-8
-6
-4
dB
1.6
2
2.4 kΩ
2.5
pF
4.1 4.3 4.5
V
49
52
55
dB
36
38
40
dB
9.5
nV/√Hz
74
dBμV
100
dBμV
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