SI4721 Silicon Laboratories, SI4721 Datasheet - Page 2

• Manufacturer Part Number: SI4721
• Description: (SI4720 / SI4721) Broadcast FM Radio Transceiver
• Manufacturer: Silicon Laboratories

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Selected Electrical Specifications
FM Transceiver
Frequency Range
Sensitivity
Input IP3
Adjacent Channel Selectivity
Alternate Channel Selectivity
RX Audio Output Voltage
RX Audio Band Limits
RX Audio S/N
RX Audio THD
Programmable Transmit Output
Voltage, TXO (Maximum Voltage)
Programmable Transmit Output
Voltage, TXO (Minimum Voltage)
Transmit Voltage Stability
Transmit Voltage Step
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)
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
Parameter
7
19
GND
8
PAD
Broadcast FM Radio Transceiver for Portable Applications
18
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 © 2007 by Silicon Laboratories
SCR
f
V
RF
AI
Symbol
D2
A1
E2
A
b
D
e
E
|f
c
2
– f
1
| > 1 MHz; f
0.50
0.00
0.18
0.27
1.60
1.60
Min
(S+N)/N = 26 dB
Test Condition
FMPE[1:0] = 00
FMPE[1:0] = 01
AGC disabled
V
±200 kHz
±400 kHz
IO
±1.5 dB
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
Min
76
—
—
—
—
72
30
—
—
—
—
–1
—
—
—
70
45
—
—
30
—
—
Symbol
aaa
bbb
ddd
eee
ccc
L1
L
f
Typ
108
–30
–50
115
2.2
0.1
0.1
50
70
80
63
83
75
50
63
35
—
—
—
—
—
1
Si4720/21
0.35
0.00
Min
—
—
—
—
—
Millimeters
0.636
2.53 BSC
Max
108
15k
–20
–26
–40
90
80
54
—
—
—
—
—
—
—
—
—
—
—
1
2
Nom
0.40
—
—
—
—
—
—
dBµV EMF
µV EMF
mVrms
Max
0.45
0.10
0.10
0.10
0.08
0.10
0.10
dBµV
dBµV
Unit
MHz
dBC
dBC
V
dB
dB
Hz
dB
dB
dB
dB
dB
dB
us
us
1.18.07
%
%
pk