SI4745-C10-GM Datasheet, PDF (2/2 Pages) Silicon Laboratories – Automotive AM/FM Radio Receiver

Si4740/41/42/43/44/45
Automotive AM/FM Radio Receiver
Selected Electrical Specifications¹
(V_DD = 2.7 to 5.5 V, V_IO = 1.5 to 3.6 V, T_A = –40 to 85 °C)
Parameter
Test Condition
Min Typ Max
Unit
FM
Input Frequency
64
—
108
MHz
Sensitivity
(S+N)/N = 26 dB
—
2
—
µV EMF
RDS Sensitivity
f = 2 kHz, RDS BLER < 5%
—
8
—
µV EMF
Audio S/N (Mono)^2,3
Audio THD (Mono)^2,3
Input IP3
Audio Output Voltage
f_MOD = 1 kHz, f = 22.5 kHz,
V_EMF = 60 dBµV_EMF
f_MOD = 1 kHz, f = 75 kHz,
V_EMF = 60 dBµV_EMF
f₁ = 4000 kHz; f₂ = 8000 kHz
—
63
—
dB
—
0.1
—
%
—
105
— dBµV EMF
—
80
—
mVrms
Adjacent Channel Selectivity
±200 kHz
—
50
—
dB
Alternate Channel Selectivity
±400 kHz
—
70
—
dB
AM Suppression⁴
Audio Stereo Separation⁴
Supply Voltage⁵
Supply Current⁵
m = 0.3; f = 22.5 kHz; f_RF = 76 to 108 MHz;
Measured at V_EMF = 60 dBµV_EMF
—
55
—
dB
f_RF = 76 to 108 MHz; Measured at V_EMF =
60 dBµV_EMF; f = 75 kHz
—
45
—
dB
3
—
3.6
V
—
26
—
mA
AM
Input Frequency
520
—
1710
kHz
Sensitivity
(S+N)/N = 26 dB
—
28
—
µV EMF
Audio S/N^4,6
30% modulation, f_MOD =1 kHz,
RF level = 74 dBµV EMF; f = 22.5 kHz
—
53
—
dB
Audio THD^4,6
Input IP3⁷
Audio Output Voltage⁴
30% modulation, f_MOD =1 kHz,
RF level = 74 dBµV EMF; f = 22.5 kHz
f₁ = 40 kHz; f₂ = 80 kHz
—
0.3
—
%
—
112
—
dBµV
54
60
66
mVrms
Adjacent Channel Selectivity
±10 kHz
—
40
—
dB
Alternate Channel Selectivity
±20 kHz
—
60
—
dB
Notes:
1. Specifications refer to Si474x application circuit input.
2. B_AF = 300 Hz to 15 kHz.
3. f_RF = 76 to 108 MHz.
4. F_MOD = 1 kHz, 75 µs de-emphasis, MONO = enabled, and L = R unless noted otherwise.
5. Applies to both FM and AM modes.
6. AGC is disabled.
7. Specification refers to Si474x input.
Pin Assignments
4 x 4 x 0.85 mm 24-pin QFN Package Information
24 23 22 21 20 19
FMI 1
18 DFS
RFGND 2
17 DOUT
AGC1 3
NC 4
GND
PAD
16 LOUT
15 ROUT
GND 5
14 GND
AMI 6
13 VDD
7 8 9 10 11 12
Symbol
A
A1
b
D
D2
e
E
E2
L
aaa
bbb
ccc
ddd
eee
Millimeters
Min Nom Max
0.80 0.85 0.90
0.00 0.02 0.05
0.18 0.25 0.30
4.00 BSC
2.00 2.10 2.20
0.50 BSC
4.00 BSC
2.00 2.10 2.20
0.30 0.40 0.50
—
— 0.10
—
— 0.10
—
— 0.08
—
— 0.10
—
— 0.10
AM/FM Receiver
Copyright © 2008 by Silicon Laboratories
10.23.08
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