Si4355
E
A S Y
-
T O
- U
S E
, L
O W
- C
U R R E N T
O O K / ( G ) F S K S
U B
- G H
Z
R
E C E IV E R
Features
Frequency range =
283–960 MHz
Receive sensitivity
= –116 dBm
Modulation
(G)FSK
OOK
Low RX Current = 10 mA
Low standby current = 50 nA
Max data rate = 500 kbps
Power supply = 1.8 to 3.6 V
64 byte FIFO
Auto frequency control (AFC)
Automatic gain control (AGC)
Integrated battery voltage sensor
Packet handling including
preamble, sync word detection, and
CRC
Low BOM
20-Pin 3x3 mm QFN package
Pin Assignments
Applications
Remote control
Home security and alarm
Telemetry
Garage and gate openers
Remote keyless entry
Home automation
Industrial control
Sensor networks
Health monitors
GPIO3
GPIO2
GND
SDN
RXp
RXn
NC
1
2
3
4
5
6
20
19
18
17
XOUT
16 nSEL
15 SDI
14 SDO
13 SCLK
12 nIRQ
10
GPIO0
11 GPIO1
Description
Silicon Laboratories’ Si4355 is an easy to use, low current, sub-GHz
EZRadio
®
receiver. Covering all major bands, it combines plug-and-play
simplicity with the flexibility needed to handle a wide variety of
applications. The compact 3x3 mm package size combined with a low
external BOM count makes the Si4355 both space efficient and cost
effective. Excellent sensitivity of 116 dBm allows for a longer operating
range, while the low current consumption of 10 mA active and 50 nA
standby, provides for superior battery life. By fully integrating all
components from the antenna to the GPIO or SPI interface to the MCU,
the Si4355 makes realizing this performance in an application easy.
Design simplicity is further exemplified in the Wireless Development Suite
(WDS) user interface module. This configuration module provides
simplified programming options for a broad range of applications in an
easy to use format that results in both a faster and lower risk
development. Like all Silicon Laboratories’ EZRadio devices, the Si4355
is fully compliant with all worldwide regulatory standards, such as FCC,
ETSI, and ARIB.
GND
7
VDD
8
VDD
Patents pending
Rev 1.0 7/12
Copyright © 2012 by Silicon Laboratories
GND
XIN
9
Si4355
Si4355
Functional Block Diagram
GPIO3
GPIO2
XIN XOUT
SDN
Synthesizer
25-32MHz XO
Rx Chain
SPI Interface
Controller
nSEL
SDI
SDO
SCLK
nIRQ
Battery
Voltage
Sensor
VDD
Aux ADC
GPIO1
PGA
ADC
Rx Modem
RXp
RXn
LNA
GPIO0
2
Rev 1.0
Si4355
T
ABLE O F
C
ONTENTS
Section
Page
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.1. Definition of Test Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2. Typical Applications Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2. Receiver Chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3. Receiver Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.4. Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.5. Crystal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.6. Battery Voltage and Auxiliary ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4. Configuration Options and User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1. EZConfig GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2. Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3. Configuration Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5. Controller Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1. Serial Peripheral Interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2. Operating Modes and Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.3. Application Programming Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.4. Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.5. GPIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6. Data Handling and Packet Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
6.1. RX FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2. Packet Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9. Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
10. PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
11. Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
11.1. Si4355 Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
11.2. Top Marking Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Rev 1.0
3
Si4355
1. Electrical Specifications
Table 1. Recommended Operating Conditions
Parameter
Ambient Temperature
Supply Voltage
I/O Drive Voltage
Symbol
T
A
V
DD
V
GPIO
Test Condition
Min
–40
1.8
1.8
Typ
25
Max
85
3.6
3.6
Unit
C
V
V
Table 2. DC Characteristics
1
Parameter
Supply Voltage
Range
Power Saving Modes
Symbol
V
DD
I
Shutdown
I
Standby
RC oscillator, main digital regulator, and low power
digital regulator OFF
Register values maintained and
RC oscillator/WUT OFF
Conditions
Min
1.8
—
—
Typ
3.3
30
50
Max Units
3.6
—
—
V
nA
nA
I
Ready
I
SPI Active
TUNE Mode Current
RX Mode Current
I
Tune_RX
I
RX
Crystal Oscillator and Main Digital Regulator ON,
all other blocks OFF
SPI Active State
RX Tune
—
2
1.35
—
mA
mA
—
—
6.5
10
—
—
mA
mA
Notes:
1.
All specifications guaranteed by production test unless otherwise noted. Production test conditions and max limits are
listed in the "Production Test Conditions" section of "1.1. Definition of Test Conditions" on page 9.
2.
Guaranteed by qualification. Qualification test conditions are listed in the "Qualification Test Conditions" section in "1.1.
Definition of Test Conditions" on page 9.
4
Rev 1.0
Si4355
Table 3. Synthesizer AC Electrical Characteristics
1
Parameter
Synthesizer Frequency
Range
Symbol
F
SYN
Conditions
Min
283
425
850
Synthesizer Frequency
Resolution
2
F
RES-960
F
RES-525
F
RES-350
Synthesizer Settling Time
2
t
LOCK
850–960 MHz
425–525 MHz
283–350 MHz
Measured from exiting Ready mode with
XOSC running to any frequency,
including VCO Calibration
—
—
—
—
Typ
—
—
—
114.4
57.2
38.1
130
Max
350
525
960
—
—
—
—
Units
MHz
MHz
MHz
Hz
Hz
Hz
µs
Notes:
1.
All specifications guaranteed by production test unless otherwise noted. Production test conditions and max limits are
listed in the "Production Test Conditions" section in "1.1. Definition of Test Conditions" on page 9.
2.
Guaranteed by qualification. Qualification test conditions are listed in the "Qualification Test Conditions" section in "1.1.
Definition of Test Conditions" on page 9.
Table 4. Receiver AC Electrical Characteristics
1
Parameter
RX Frequency
Range
RX Sensitivity
Symbol
F
RX
Conditions
Min
283
425
850
P
RX-_2
(BER < 0.1%)
(2.4 kbps, GFSK, BT = 0.5,
f
=
30
kHz)
2
,114 kHz Rx BW
(BER < 0.1%)
(40 kbps, GFSK, BT = 0.5,
f
=
25
kHz)
2
, 114 kHz Rx BW
(BER < 0.1%)
(128 kbps, GFSK, BT = 0.5,
f
=
70
kHz)
2
, 305 kHz Rx BW
BER < 0.1%, 1 kbps, 185 kHz Rx BW,
OOK, PN15 data
BER < 0.1%, 40 kbps, 185 kHz Rx BW,
OOK, PN15 data
RX Channel Bandwidth
2
BW
—
Typ
—
—
—
–116
Max
350
525
960
—
Units
MHz
MHz
MHz
dBm
P
RX-_40
—
–108
—
dBm
P
RX-_128
—
–103
—
dBm
P
RX-_OOK
—
—
40
–113
–102
—
—
—
850
dBm
dBm
kHz
Notes:
1.
All specifications guaranteed by production test unless otherwise noted. Production test conditions and max limits are
listed in the "Production Test Conditions" section in "1.1. Definition of Test Conditions" on page 9.
2.
Guaranteed by qualification. Qualification test conditions are listed in the "Qualification Test Conditions" section in "1.1.
Definition of Test Conditions" on page 9.
Rev 1.0
5
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