SI4012-A0-GT View Datasheet(PDF) - Silicon Laboratories
Part Name
Description
Manufacturer
SI4012-A0-GT Datasheet PDF : 16 Pages
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Si4012
2. Functional Description
Si4012
DIGITAL LOGIC
SDA
SCL
SDN
nIRQ
SMBus
INTERFACE
ANTENNA
TUNE
OOK
FSK
MODULATOR
LED
GPIO0/XTAL
DIGITAL
CONTROLLER
TX
256 BYTE
DATA FIFO
REGISTER
BANK
RF ANALOG CORE
DIVIDER
PA
LCOSC
AUTO
TXP
TUNE
TXM
LPOSC
VA
LDO
VDD
SLP
TMR
POR
VD
BANDGAP
GND
XTAL
OSC
BATTERY
MONITOR
Figure 1. Si4012 Functional Block Diagram
The Si4012 is a crystal wireless transmitter with
continuous frequency tuning over the frequency range
of 27–960 MHz. The wide operating voltage range of
1.8–3.6 V and low current consumption makes the
Si4012 an ideal solution for battery powered
applications.
The RF carrier is generated by Silicon Labs patented
pending crystal-less oscillator technology. The device
achieves a frequency accuracy of ±150 ppm over the
commercial temperature range of 0 to 70 °C and
±250 ppm over the industrial temperature range of –40
to +85 °C.
The Si4012's PA output power can be configured
between –13 to +10 dBm with 0.25 dB of resolution.
The PA incorporates automatic ramp-up and ramp-
down control to reduce unwanted spectral spreading.
The Si4012 is designed to work with a microcontroller to
allow custom configuration of the transmitter for
optimum performance. Voltage regulators are integrated
on-chip which allows for a wide operating supply voltage
range of 1.8 to 3.6 V. A standard 2-pin SMB (I2C) bus is
used to communicate with an external microcontroller.
10
Rev 0.1
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