Description：

Silicon Laboratories’ Si4430/31/32 devices are highly integrated, single chipwireless ISM transceivers. The high-performance EZRadioPRO® family includesa complete line of transmitters, receivers, and transceivers allowing the RFsystem designer to choose the optimal wireless part for their application.The Si4430/31/32’s high level of integration offers reduced BOM cost whilesimplifying the overall system design. The extremely low receive sensitivity(–121 dBm) coupled with industry leading +20 dBm output power ensuresextended range and improved link performance. Built-in antenna diversity andsupport for frequency hopping can be used to further extend range and enhanceperformance.The Si4430/31/32 offers advanced radio features including continuous frequencycoverage from 240–960 MHz in 156 Hz or 312 Hz steps allowing precise tuningcontrol. Additional system features such as an automatic wake-up timer, lowbattery detector, 64 byte TX/RX FIFOs, automatic packet handling, and preambledetection reduce overall current consumption and allow the use of lower-costsystem MCUs. An integrated temperature sensor, general purpose ADC, poweron-reset (POR), and GPIOs further reduce overall system cost and size.The Si4430/31/32’s digital receive architecture features a high-performance ADCand DSP based modem which performs demodulation, filtering, and packethandling for increased flexibility and performance. The direct digital transmitmodulation and automatic PA power ramping ensure precise transmit modulationand reduced spectral spreading ensuring compliance with global regulationsincluding FCC, ETSI, ARIB, and 802.15.4d regulations.An easy-to-use calculator is provided to quickly configure the radio settings,simplifying customer's system design and reducing time to market.

Features：

 Frequency Range

240–930 MHz (Si4431/32)

900–960 MHz (Si4430)

 Sensitivity = –121 dBm

 Output power range

+20 dBm Max (Si4432)

+13 dBm Max (Si4430/31)

 Low Power Consumption

18.5 mA receive

30 mA @ +13 dBm transmit

85 mA @ +20 dBm transmit

 Data Rate = 0.123 to 256 kbps

 FSK, GFSK, and OOK modulation

 Power Supply = 1.8 to 3.6 V

 Ultra low power shutdown mode

 Digital RSSI

 Wake-up timer

 Auto-frequency calibration (AFC)

 Power-on-reset (POR)

 Antenna diversity and TR switchcontrol

 Configurable packet handler

 Preamble detector

 TX and RX 64 byte FIFOs

 Low battery detector

 Temperature sensor and 8-bit ADC

 –40 to +85 °C temperature range

 Integrated voltage regulators

 Frequency hopping capability

 On-chip crystal tuning

 20-Pin QFN package

 Low BOM

Applications：

 Remote control

 Home security & alarm

 Telemetry

 Personal data logging

 Toy control

 Tire pressure monitoring

 Wireless PC peripherals

 Remote meter reading

 Remote keyless entry

 Home automation

 Industrial control

 Sensor networks

 Health monitors

 Tag readers