PDF SI4012 Data sheet ( Hoja de datos )

Número de pieza	SI4012
Descripción	CRYSTAL-LESS RF TRANSMITTER
Fabricantes	Silicon Laboratories
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No Preview Available ! www.DataSheet.co.kr Si4012 Si4012 CRYSTAL-LESS 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 = 0 to 100 kbaud FSK  FSK and OOK modulation  Power Supply = 1.8 to 3.6 V  Crystal-less operation ±150 ppm: 0 to 20° C ±250 ppm: –40 to 85° C Optional crystal input for higher tolerances  Low power shutdown mode  Integrated voltage regulator  256 byte FIFO  Low battery detector  SMBus Interface  –40 to +85 °C temperature range  10-Pin MSOP Package, Pb-free RoHs compliant  Low BOM Applications  Wireless MBus T1-mode  Remote control  Home security & alarm  Personal data logging  Toy control  Wireless PC peripherals Description  Remote meter reading  Remote keyless entry  Home automation  Industrial control  Sensor networks  Health monitors Silicon Laboratories’ Si4012 is a fully integrated crystal-less 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 the overall system design. Functional Block Diagram 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 LCOSC DIVIDER PA AUTO TUNE TXP TXM LPOSC SLP TMR XTAL OSC VA LDO POR VD BANDGAP BATTERY MONITOR VDD GND Ordering Information: See page 53. Pin Assignments Si4012 GPIO0/XTAL 1 GND 2 TXM 3 TXP 4 VDD 5 Si4012 10 SDA 9 SCL 8 SDN 7 nIRQ 6 LED Patents pending Rev 0.1 7/10 Copyright © 2010 by Silicon Laboratories Si4012 This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Datasheet pdf - http://www.DataSheet4U.net/ 1 page www.DataSheet.co.kr Si4012 Table 3. Si4012 RF Transmitter Characteristics (TA = 25° C, VDD = 3.3 V, RL = 550 , unless otherwise noted) Parameter Symbol Test Condition Min Typ Max Unit Frequency Range1 Frequency Noise (rms)2 FRF 27 — 960 MHz Allen deviation, measured — 0.3 — ppm across 1 ms interval Phase Noise @ 915 MHz 10 kHz offset — –70 — dBc/Hz 100 kHz offset — –100 — dBc/Hz 1 MHz offset — –105 — dBc/Hz Frequency Tuning Time —5 — ms Selected Frequencies in Range of 27–960 MHz Discrete frequencies — 315 — 390 — MHz — MHz — 433.92 — MHz — 868 — MHz Carrier Frequency Accuracy Frequency Error Contribution with External Crystal 0°C ≤ TA ≤ 70° C –40°C ≤ TA ≤ 85° C FRF = 100 MHz 0°C ≤ TA ≤ 70° C FRF = 100 MHz –40°C ≤ TA ≤ 85° C FRF = 315 MHz 0°C ≤ TA ≤ 70° C FRF = 315 MHz –40°C ≤ TA ≤ 85° C FRF = 433.92 MHz 0°C ≤ TA ≤ 70° C FRF = 433.92 MHz –40°C ≤ TA ≤ 85° C FRF = 868 MHz 0°C ≤ TA ≤ 70° C FRF = 868 MHz –40°C ≤ TA ≤ 85° C FRF = 915 MHz 0°C ≤ TA ≤ 70° C FRF = 915 MHz –40°C ≤ TA ≤ 85° C — –150 –250 –15 915 — –25 — –47.3 — –78.8 — –65.1 — –108 — –130 — –217 — –137 — –229 — –10 — — +150 +250 15 MHz ppm ppm kHz 25 kHz 47.3 kHz 78.8 kHz 65.1 kHz 108 kHz 130 kHz 217 kHz 137 kHz 229 kHz +10 ppm Notes: 1. The frequency range is continuous over the specified range. 2. The frequency step size is limited by the frequency noise. 3. Optimum differential load is equal to 4 V/(11.5mA/2 * 4/PI) = 550 Therefore the antenna load resistance in parallel with the Si4012 differential output resistance should equal 600  Rev 0.1 5 Datasheet pdf - http://www.DataSheet4U.net/ 5 Page www.DataSheet.co.kr 3. Pin Descriptions: Si4012 GPIO0/XTAL 1 GND 2 TXM 3 TXP 4 VDD 5 Si4012 10 SDA 9 SCL 8 SDN 7 nIRQ 6 LED Pin Number 1 2 3,4 5 9 7 8 9 10 Name GPIO0/XTAL GND TXM, TXP VDD LED nIRQ SDN SCL SDA Description General purpose input or crystal input Ground RF transmitter differential outputs Supply input LED driver output pin Interrupt status output, active low Shutdown input pin, active high SMB (I2C) Clock input SMB (I2C) Data input/output pin Si4012 Rev 0.1 11 Datasheet pdf - http://www.DataSheet4U.net/ 11 Page

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