EZRadio Copyright © 2012 by Silicon Laboratories 07.12.12
Rx Modem
Synthesizer
LNA PGA ADC
Rx Chain
SPI Interface
Controller
Battery
Voltage
Sensor
Aux ADC
25-32MHz XO
SDN
RXp
RXn
VDD GPIO0
GPIO1
nSEL
SDI
SDO
SCLK
nIRQ
XOUTXINGPIO2GPIO3
Si4355
EASY-TO-USE, LOW-CURRENT OOK/(G)FSK SUB-GHZ RECEIVER
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.
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 detec-
tion, and CRC
-Low BOM
-20-Pin 3 mm x 3 mm QFN package
Applications
-Remote control
-Home security and alarm
-Teleme tr y
-Garage and gate openers
-Remote keyless entry
-Home automation
-Industrial control
-Sensor networks
-Health monitors
EZRadio Copyright © 2012 by Silicon Laboratories 07.12.12
Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.
Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders
Si4355
EASY-TO-USE, LOW-CURRENT OOK/(G)FSK SUB-GHZ RECEIVER
Selected Electrical Specification
Ordering Guide
Parameter Symbol Test Condition Min Typ Max Unit
Supply Voltage VDD 1.8 3.3 3.6 V
Frequency Range FRX 283 —350 MHz
425 —525 MHz
850 —960 MHz
Current
Consumption
IShutdown —30 —nA
IStandby —50 —nA
IRX —10 —mA
Rx Sensitivity PRX-_2 BER <0.1%, 2.4 kbps, GFSK, BT = 0.5, ∆F = 25kHz,
114 kHz Rx BW
—–116 —dBm
PRX-_OOK BER < 0.1%, 1 kbps, 185 kHz Rx BW, OOK, PN15
data
—–113 —dBm
Selectivity2C/I1-CH ±1 Channel Offset —–56 —dB
C/I2-CH ±2 Channel Offset —–59 —dB
Blocking2200kBLOCK 200 kHz–1 MHz Offset —–58 —dB
1MBLOCK 1 MHz Offset —–61 —dB
8MBLOCK 8 MHz Offset —–79 —dB
Image Rejection ImREJ Rejection at the image frequency IF = 468 kHz —–35 —dB
Data Rate DRFSK (G)FSK Modulation 1.0 —500 kbps
DROOK OOK Modulation 0.5 —120 kbps
Notes:
1. Test Conditions: 3.3 VDC VDD, 25 °C, external reference signal (XIN) = 1.0 VPP at 30MHz, centered around 0.8 VDC.
Sensitivity measured at 434 MHz.
2. Desired reference signal 3 dB above sensitivity, BER < 0.1%, Interferer is CW and desired modulation with 2.4 kbps,
∆F = 30 kHz, GFSK with BT = 0.5, Rx BW = 114 kHz, 100 kHz channel spacing.
Part Number*Description Package Type Operating Temperature
Si4355-B1A-FM EZRadio Transceiver 3x3 QFN-20 Pb-free –40 to 85 °C
*Note: Add an “R” at the end of the device part number to denote tape and reel option.
Application Circuit
30 MHz
Microcontroller
GP1
GP2
GP3
GP4
L1
GND
GPIO1
19
18
17
16
1
2
3
4
15
14
13
7
8
9
10
SDI
SDO
SCLK
RXn
SDN
RXp
VDD
VDD
GPIO0
XIN
GPIO3
nSEL
XOUTGND
5
NC
6
GND 20
GPIO2
11
12 GP5
L3 C1 Si4355 nIRQ
VDD
100 n
C7
100 p
C6
1u
L4
C5
C8
L2
C2
C3
C4
GP0
Disclaimer
Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers
using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific
device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories
reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy
or completeness of the included information. Silicon Laboratories shall have no liability for the consequences of use of the information supplied herein. This document does not imply
or express copyright licenses granted hereunder to design or fabricate any integrated circuits. The products must not be used within any Life Support System without the specific
written consent of Silicon Laboratories. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected
to result in significant personal injury or death. Silicon Laboratories products are generally not intended for military applications. Silicon Laboratories products shall under no
circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons.
Trademark Information
Silicon Laboratories Inc., Silicon Laboratories, Silicon Labs, SiLabs and the Silicon Labs logo, CMEMS®, EFM, EFM32, EFR, Energy Micro, Energy Micro logo and combinations
thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZMac®, EZRadio®, EZRadioPRO®, DSPLL®, ISOmodem ®, Precision32®, ProSLIC®, SiPHY®,
USBXpress® and others are trademarks or registered trademarks of Silicon Laboratories Inc. ARM, CORTEX, Cortex-M3 and THUMB are trademarks or registered trademarks of
ARM Holdings. Keil is a registered trademark of ARM Limited. All other products or brand names mentioned herein are trademarks of their respective holders.
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