Si4012
Si4012 C
RYSTAL
-
LESS
FSK/OOK RF T
RANSMITTER
Features
Frequency range
27–960 MHz
Output power range
–13 to +10 dBm
Low Power Consumption
OOK
14.2 mA @ +10 dBm
FSK
19.8 mA @ +10 dBm
Data rate:
Up to 100 kbaud FSK
Up to 50 kbaud OOK
FSK and OOK modulation
Power supply = 1.8 to 3.6 V
Automatic antenna tuning
Programmable ramp rate
Crystal-less operation
±150 ppm: 0 to 70° C
±250 ppm: –40 to 85° C
Optional crystal input for
applications requiring tighter
tolerances
Ultra low standby current <10 nA
Integrated voltage regulator
255 byte FIFO
Low battery detector
SMBus Interface
–40 to +85 °C temperature range
10-Pin MSOP Package,
RoHs compliant
Low BOM
Ordering Information:
See page 43.
Pin Assignments
Si4012
XTAL 1
10 SDA
9 SCL
Si4012
8 SDN
7 nIRQ
6 LED
Applications
Wireless MBus T1-mode
Remote control
Home security & alarm
Personal data logging
Toy control
Wireless PC peripherals
Remote meter reading
Remote keyless entry
Home automation
Industrial control
Sensor networks
Health monitors
GND 2
TXM 3
TXP 4
VDD 5
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 27–960 MHz, adjustable output power of up to +10 dBm, and data
rates up to 100 kbaud in FSK mode. The Si4012’s high level of integration offers
reduced BOM cost while simplifying overall system design.
Patents pending
Functional Block Diagram
Si4012
Digital Logic
Antenna Tune
Host
MCU
SMBus
Interface
OOK
FSK
Modulator
LCOSC
Divider
PA
Auto
Tune
TXP
TXM
RF Analog Core
TX
255 Byte
Data FIFO
LED
XTAL
Digital
Controller
Register
Bank
LPOSC
VA
VD
XTAL
OSC
LDO
POR
BANDGAP
Battery
Monitor
VDD
GND
Rev 1.1 3/13
Copyright © 2013 by Silicon Laboratories
Si4012
SILABS [ SILICON LABORATORIES ]
