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Si4432/31/30
ISM Transceiver
Description
Silicon Laboratories' Si4432/31/30 highly-integrated, single chip wireless ISM transceiver is part of the EZRadioPROTM family. The EZRadioPRO family includes a complete line of transmitters, receivers, and transceivers allowing the RF system designer to choose the optimal wireless part for their application. The Si4432/31 offers advanced radio features, including continuous frequency coverage from 240-930 MHz and adjustable output power of up to +20 dBm with the Si4432. The Si4430 offers frequency coverage from 900 to 960 MHz to support the Japanese frequency bands. The Si4432/31/30's high level of integration offers reduced BOM cost while simplifying overall system design. The extremely low receive sensitivity (-118 dBm) coupled with the Si4432's industry-leading +20 dBm output power ensures extended range and improved link performance. Built-in antenna diversity and support for frequency hopping can be used to further extend range and enhance performance. Antenna diversity is completely integrated into the Si443x and can improve the system link budget by 8-10 dB, resulting in substantial range increases under adverse environmental conditions. Additional system features, such as an automatic wake-up timer, low battery detector, 64 byte TX/RX FIFOs, automatic packet handling, and preamble detection, reduce overall current consumption and allow the use of lower-cost system MCUs. An integrated temperature sensor, general-purpose ADC, power-onreset (POR), and GPIOs further reduce overall system cost and size. The Si4432/31/30 receiver uses a single-conversion architecture to convert the 2-level FSK/GFSK/OOK modulated receive signal to a low IF frequency. Following a programmable gain amplifier (PGA) the signal is converted to the digital domain by a highperformance delta-sigma ADC allowing filtering, demodulation, slicing, error correction, and packet handling to be performed in the built-in DSP, increasing the receiver's performance and flexibility versus analog based architectures. The PA is single-ended to allow for easy antenna matching and low BOM cost. The digital transmit modulation and automatic PA power ramping ensure precise transmit modulation and reduced spectral splatter, ensuring compliance with FCC and ETSI regulations. The Si4430 is designed to ensure compliance with ARIB regulations. The Si4432/31/30 is designed to work with an MCU, crystal, and a few passives to create a very low-cost system. Voltage regulators are integrated on-chip, which allows for a wide range of operating supply voltage conditions from +1.8 to +3.6 V.
Features
- Frequency Range = 240-930 MHz (Si4432/31)
900-960 MHz (Si4430)
- Sensitivity = -118 dBm - FSK, GFSK, and OOK modulation - Max Output Power = +20 dBm (Si4432)
+13 dBm (Si4431/30)
- Low Power Consumption - 18.5 mA receive - 27 mA @ +11 dBm transmit - Data Rate = 1 to 128 kbps - Power Supply = 1.8 to 3.6 V - Ultra low power shutdown mode - Wake-up timer - Auto-frequency calibration (AFC) - Antenna diversity and TR switch control - Programmable packet handler - TX and RX 64 byte FIFOs - Low battery detector - Temperature sensor and 8-bit ADC - Frequency hopping capability - On-chip crystal tuning - 20-Pin QFN package - Low BOM
Applications
Remote control Home security and alarm Telemetry Toy control Remote meter reading Remote keyless entry Home automation Industrial control Sensor networks Health monitors Tag readers
VDD_RF
RF LDO PLL LDO VCO LDO
RC 32K OSC
VCO LPF CP PFD
30M XTAL OSC LBD
TX
PA
VDD_DIG
SDN
nSEL Temp Sensor 8Bit ADC Low Power Digital LDO Digital LDO POR
Xin
PA_RAMP PWR_CTRL
N
Delta Sigma Modulator
ANTDIV TXRXSW PA_RAMP PWR_CTRL
TXMOD
Digital Logic
SCLK SDI SDO VDD_DIG
SPI, & Controller
Digital Modem AGC Control
RFp RFn
ADC LNA
Mixers
IF LDO VR_IF BIAS
PGA
GPIO_0 GPIO_1 GPIO_2 VR_DIG
EZRadioPRO
Copyright (c) 2009 by Silicon Laboratories
Xout
2.20.09
Si4432/31/30
ISM Transceiver
Selected Electrical Specifications
Parameter Supply Voltage Range Symbol Vdd IShutdown Power Saving Modes IStandby ISleep RX Mode Current IRX ITX_+20 TX Mode Current (Si4432) ITX_+11 ITX_+13 TX Mode Current (Si4430/31) ITX_+1 Synthesizer Frequency Range (Si4432/31) Synthesizer Frequency Range (Si4430) Synthesizer Frequency Resolution RX Sensitivity RX Bandwidth Output Power Range (Si4432) Output Power Range (Si4431/30) TX RF Output Steps Operating Ambient Temperature Range FSYNTH-LB FSYNTH-HB FSYNTH-HB FRES-LB FRES-HB PRX_2 BW PTX PTX PRF_OUT TA Power control by txpow[2:0] Register Power control by txpow[2:0] Register Controlled by txpow[2:0] Register txpow[2:0] = 011 (+20 dBm), VDD = 3.3 V txpow[2:0] = 000 (+11 dBm), VDD = 3.3 V txpow[2:0] = 111 (+13 dBm), VDD = 3.3 V txpow[2:0] = 100 (+1 dBm), VDD = 3.3 V Low Band High Band High Band Low Band High Band (BER < 0.1%) (2 kbps, GFSK, BT = 0.5, f = 5 kHz)2 Test Condition RC Oscillator, Main Digital Regulator, and Low Power Digital Regulator OFF Register values retained, Main Digital Regulator and RC Oscillator OFF RC Oscillator ON, Register values retained, Main Digital Regulator OFF Min 1.8 -- -- -- -- -- -- -- -- 240 480 900 -- -- -- 2.6 11 -8 -- -40 Typ 3.0 10 400 800 18.5 80 27 28 16 -- -- -- 156.25 312.5 -118 -- -- -- 3 Max 3.6 -- -- -- -- -- -- -- -- 480 930 960 -- -- -- 620 20 13 -- 85 Unit V nA nA nA mA mA mA mA mA MHz MHz MHz Hz Hz dBm kHz dBm dBm dB C
Pin Assignments
XOUT nSEL nIRQ SDN XIN
20-pin QFN Package Information
20 19 18 17 16 VDD_RF TX RXp RXn VR_IF 1 2 3 4 5 6 NC Metal Paddle 7 GPIO_0 8 GPIO_1 9 10 GPIO_2 VDR 15 14 13 12 11 SCLK SDI SDO VDD_DIG NC
EZRadioPRO
Copyright (c) 2009 by Silicon Laboratories
2.20.09
Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc. Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.

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