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SI4012-C1001AT Folha de dados(PDF) 9 Page - Silicon Laboratories

Nome de Peças SI4012-C1001AT
Descrição Electrónicos  Si4012 CRYSTAL-LESS FSK/OOK RF TRANSMITTER
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Fabricante Electrônico  SILABS [Silicon Laboratories]
Página de início  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SI4012-C1001AT Folha de dados(HTML) 9 Page - Silicon Laboratories

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Si4012
Rev 1.1
9
3. Functional Description
Figure 1. Si4012 Functional Block Diagram
The Si4012 is a fully-integrated, crystal-less, sub-GHz CMOS RF transmitter offering industry-leading RF
performance, high integration, flexibility, low BOM, small board area, and ease of design.
The device is designed to operate with any host MCU via a serial interface while optimized for battery-powered
applications. The Si4012 operates from voltages ranging from 1.8 to 3.6 V and offers an ultra-low standby current
consumption of less than 10 nA.
The embedded power amplifier can be programmed to supply from –13 dBm up to +10 dBm, while the patented
automatic antenna tuning circuit ensures that the resonant frequency and impedance matching between the PA
output and the connected antenna are configured for optimum transmit efficiency and low harmonic content.
Users may configure the device for either FSK or OOK modulation with supported symbol rates of up to 100 kbps.
To ensure the lowest system cost, the Si4012 can be used without an external crystal or frequency reference by
leveraging Silicon Labs' patented and proven crystal-less oscillator technology. This technology offers better than
±150 ppm carrier frequency stability over the temperature range of 0 to +70 °C and ±250 ppm carrier frequency
stability over the industrial temperature range of –40 to + 85 °C. No production alignments are necessary since all
RF functions are integrated into the device.
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


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