Rev 1.1 3/13
Copyright ?2013 by Silicon Laboratories
Si4012
Si4012
Si4012 CRYSTAL-LESS FSK/OOK RF TRANSMITTER
Features
Applications
Description
Silicon Laboratories Si4012 is a fully-integrated crystalless CMOS high-data-rate
RF transmitter designed for the sub-GHz ISM band. This chip is optimized for
battery powered applications requiring low standby currents and high output
transmit power.
The device offers advanced radio features including continuous frequency
coverage from 27960 MHz, adjustable output power of up to +10 dBm, and data
rates up to 100 kbaud in FSK mode. The Si4012s high level of integration offers
reduced BOM cost while simplifying overall system design.
Functional Block Diagram
n Frequency range
l 27960 MHz
n Output power range
l 13 to +10 dBm
n Low Power Consumption
l OOK
14.2 mA @ +10 dBm
l FSK
19.8 mA @ +10 dBm
n Data rate:
l Up to 100 kbaud FSK
l Up to 50 kbaud OOK
n FSK and OOK modulation
n Power supply = 1.8 to 3.6 V
n Automatic antenna tuning
n Programmable ramp rate
n Crystal-less operation
l ?/SPAN>150 ppm: 0 to 70?/SPAN> C
l ?/SPAN>250 ppm: 40 to 85?/SPAN> C
l Optional crystal input for
applications requiring tighter
tolerances
n Ultra low standby current <10 nA
n Integrated voltage regulator
n 255 byte FIFO
n Low battery detector
n SMBus Interface
n 40 to +85 ?/SPAN>C temperature range
n 10-Pin MSOP Package,
RoHs compliant
n Low BOM
n Wireless MBus T1-mode
n Remote control
n Home security & alarm
n Personal data logging
n Toy control
n Wireless PC peripherals
n Remote meter reading
n Remote keyless entry
n Home automation
n Industrial control
n Sensor networks
n Health monitors
Si4012
XTAL
LED
LCOSC
PA
Divider
XTAL
OSC
Auto
Tune
FSK
OOK
LPOSC
LDO
POR
BANDGAP
VA
VD
TXP
TXM
VDD
GND
RF Analog Core
Antenna Tune
Modulator
SMBus
Interface
Digital Logic
TX
255 Byte
Data FIFO
Register
Bank
Digital
Controller
Battery
Monitor
Host
MCU
Patents pending
Ordering Information:
See page 43.
Pin Assignments
2
3
6
7
8
4
5
9 SCL
SDN
nIRQ
LED
VDD
XTAL
TXP
GND
TXM
1
10 SDA
Si4012
Si4012
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