Si4012 Si4012 CRYSTAL-LESS FSK/OOK RF TRANSMITTER Features Frequency range Programmable ramp rate 27960 MHz Crystal-less operation 150 ppm: 0 to 70 C Output power range 250 ppm: 40 to 85 C 13 to +10 dBm Optional crystal input for Low Power Consumption applications requiring tighter OOK tolerances 14.2mA +10dBm Ultra low standby current <10 nA FSK Integrated voltage regulator 19.8mA +10dBm 255 byte FIFO Ordering Information: Data rate: Low battery detector Up to 100 kbaud FSK See page 43. SMBus Interface Up to 50 kbaud OOK 40 to +85 C temperature range FSK and OOK modulation 10-Pin MSOP Package, Pin Assignments Power supply = 1.8 to 3.6 V RoHs compliant Automatic antenna tuning Low BOM Si4012 Applications XTAL 1 10 SDA GND 2 9SCL Wireless MBus T1-mode Remote meter reading Remote control Remote keyless entry TXM 3 8 SDN Si4012 Home security & alarm Home automation TXP 4 7 nIRQ Personal data logging Industrial control Toy control Sensor networks VDD 5 6 LED Wireless PC peripherals Health monitors Description Patents pending 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 Si4012 Digital Logic RF Analog Core Antenna Tune OOK SMBus Host Interface MCU TXP Auto FSK Divider PA Tune TXM Modulator LCOSC TX 255 Byte LPOSC Data FIFO LDO VA VDD Digital LED POR Controller VD GND XTAL BANDGAP Register XTAL Bank Battery OSC Monitor Rev 1.1 3/13 Copyright 2013 by Silicon Laboratories Si4012Si4012 2 Preliminary Rev. 0.1