SI4012 Datasheet, PDF (1/50 Pages) Silicon Laboratories – CRYSTAL-LESS RF TRANSMITTER

Si4012
Si4012 CRYSTAL-LESS FSK/OOK RF TRANSMITTER
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
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
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.
Functional Block Diagram
Ordering Information:
See page 43.
Pin Assignments
Si4012
XTAL 1
GND 2
TXM 3
TXP 4
VDD 5
Si4012
10 SDA
9 SCL
8 SDN
7 nIRQ
6 LED
Patents pending
Host
MCU
LED
XTAL
Digital Logic
Antenna Tune
SMBus
Interface
OOK
FSK
Modulator
Digital
Controller
TX
255 Byte
Data FIFO
Register
Bank
Si4012
RF Analog Core
Divider
PA
LCOSC
Auto
TXP
Tune
TXM
LPOSC
VA
LDO
VDD
POR
VD
BANDGAP
GND
XTAL
OSC
Battery
Monitor
Rev 1.0 2/12
Copyright © 2012 by Silicon Laboratories
Si4012