si4720 Silicon Laboratories, si4720 Datasheet - Page 2

• Manufacturer Part Number: si4720
• Description: Broadcast Fm Radio Transceiver For Portable Applications
• Manufacturer: Silicon Laboratories

Selected Electrical Specifications
FM Transceiver
Frequency Range
Sensitivity Headphone Matching
Sensitivity 50 Ω Matching
Input IP3
Adjacent Channel Selectivity
Alternate Channel Selectivity
RX Audio Output Voltage
RX Audio Mono S/N
RX Audio THD
Programmable Transmit Output
Voltage, TXO
Transmit Voltage Accuracy
Transmit Channel Edge Power
Transmit Adjacent Channel Power
Pre/de-emphasis Time Constant
TX Audio SNR
TX Audio THD
TX Audio Stereo Separation
TX Sub Carrier Rejection Ratio
TX Audio Input Signal Level (0 dB)
Supply Voltage
Interface Supply Voltage
RX Supply Current
TX Supply Current
RFGND
TXO
RST
FMI
NC
Pin Assignments
Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders
2
3
4
5
1
6
20
7
Parameter
19
GND
8
PAD
18
Broadcast FM Radio Transceiver for Portable Applications
9
17
10
Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.
16
11
15 RIN/DIO
14
13
12
LOUT/DFS
ROUTDIO
GND
VDD
Symbol
Copyright © 2008 by Silicon Laboratories
SCR
V
V
f
V
I
I
RX
RF
TX
DD
AI
IO
Symbol
D2
A1
E2
A
D
E
|f
b
c
e
2
TX_PREMPHASIS = 75 µs
TX_PREMPHASIS = 50 µs
– f
FM TX from Line Input
V
1
| > 1 MHz; f
RF
0.50
0.00
0.18
0.27
1.60
1.60
Min
(S+N)/N = 26 dB
(S+N)/N = 26 dB
Test Condition
AGC disabled
= 102–118 dBµV
V
±200 kHz
±400 kHz
IO
Millimeters
3.00 BSC
0.50 BSC
3.00 BSC
= 1.8 V
Nom
0.55
0.02
0.25
0.32
1.70
1.70
0
Package Information
= 2 x f
Max
0.60
0.05
0.30
0.37
1.80
1.80
1
– f
2
–2.5
Min
100
2.7
1.5
76
—
—
35
60
72
55
—
—
—
—
70
45
—
—
30
40
—
—
—
Symbol
aaa
bbb
ddd
eee
ccc
L1
L
f
19.2
18.8
Typ
105
–30
118
2.2
1.1
0.1
0.1
50
70
80
63
75
50
63
35
50
—
—
—
—
—
—
Si4720/21
0.35
0.00
Min
—
—
—
—
—
Millimeters
0.636
2.53 BSC
Max
22.8
108
–20
–26
3.5
0.5
2.5
5.5
3.6
90
80
54
22
—
—
—
—
—
—
—
—
—
—
Nom
0.40
—
—
—
—
—
—
dBµV EMF
µV EMF
µV EMF
mVrms
Max
0.45
0.10
0.10
0.10
0.08
0.10
0.10
dBµV
Unit
MHz
dBC
dBC
V
mA
mA
dB
dB
dB
dB
dB
dB
dB
us
us
3.26.08
%
%
V
V
pk