Si4432/31/30 ISM Transceiver Description Features Silicon Laboratories’ Si4432/31/30 highly-integrated, single chip wireless ISM transceiver is part of the EZRadioPRO™ 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. - Frequency Range = 240–930 MHz (Si4432/31) +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 nSEL Xin VDD_DIG RC 32K OSC RF LDO Xout Tag readers SDN VDD_RF 900–960 MHz (Si4430) - Sensitivity = –118 dBm - FSK, GFSK, and OOK modulation - Max Output Power = +20 dBm (Si4432) PLL LDO VCO LDO VCO LPF CP 30M XTAL OSC PFD LBD TX PA Temp Sensor PA_RAMP PWR_CTRL N 8Bit ADC Delta Sigma Modulator ANTDIV TXRXSW PA_RAMP PWR_CTRL TXMOD Digital Logic SCLK SDI SDO VDD_DIG SPI, & Controller Digital Modem AGC Control Low Power Digital LDO Digital LDO RFp ADC RFn POR LNA EZRadioPRO BIAS PGA Copyright © 2009 by Silicon Laboratories VR_DIG IF LDO VR_IF GPIO_0 GPIO_1 GPIO_2 Mixers 2.20.09 Si4432/31/30 ISM Transceiver Selected Electrical Specifications Parameter Supply Voltage Range Symbol Vdd IShutdown IStandby Power Saving Modes ISleep RX Mode Current 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 Typ 3.0 Max 3.6 Unit V — 10 — nA — 400 — nA — 800 — nA — 18.5 — mA ITX_+20 txpow[2:0] = 011 (+20 dBm), VDD = 3.3 V — 80 — mA ITX_+11 txpow[2:0] = 000 (+11 dBm), VDD = 3.3 V — 27 — mA ITX_+13 txpow[2:0] = 111 (+13 dBm), VDD = 3.3 V — 28 — mA IRX TX Mode Current (Si4432) TX Mode Current (Si4430/31) Synthesizer Frequency Range (Si4432/31) FSYNTH-LB FSYNTH-HB txpow[2:0] = 100 (+1 dBm), VDD = 3.3 V Low Band High Band Synthesizer Frequency Range (Si4430) FSYNTH-HB High Band 900 — 960 MHz FRES-LB FRES-HB Low Band High Band (BER < 0.1%) (2 kbps, GFSK, BT = 0.5, f = 5 kHz)2 — — 156.25 312.5 — — Hz Hz — –118 — dBm ITX_+1 Synthesizer Frequency Resolution RX Sensitivity PRX_2 — 16 — mA 240 480 — — 480 930 MHz MHz RX Bandwidth BW 2.6 — 620 kHz Output Power Range (Si4432) PTX Power control by txpow[2:0] Register 11 — 20 dBm PTX Power control by txpow[2:0] Register –8 — 13 dBm PRF_OUT Controlled by txpow[2:0] Register — 3 — dB 85 °C Output Power Range (Si4431/30) TX RF Output Steps Operating Ambient Temperature Range 20-pin QFN Package Information nIRQ nSEL XOUT XIN Pin Assignments SDN –40 TA 20 19 18 17 16 14 SDI RXp 3 13 SDO RXn 4 12 VDD_DIG VR_IF 5 11 NC 6 7 8 9 10 EZRadioPRO VDR Metal Paddle GPIO_2 SCLK 2 GPIO_1 15 TX NC 1 GPIO_0 VDD_RF Copyright © 2009 by Silicon Laboratories 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. 2.20.09