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.
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Frequency Range = 240–930 MHz (Si4432/31)
900–960 MHz (Si4430)
Sensitivity = –118 dBm
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FSK, GFSK, and OOK modulation
Max Output Power = +20 dBm (Si4432)
+13 dBm (Si4431/30)
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-on-
reset (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 high-
performance 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.
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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
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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
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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
RC 32K OSC
PLL LDO
VCO LDO
VCO
30M XTAL
OSC
LBD
LPF
CP
N
PFD
TX
PA
Temp
Sensor
8Bit
ADC
Digital Logic
TXMOD
Delta Sigma
Modulator
SCLK
ANTDIV
TXRXSW
SDI
SDO
SPI, & Controller
Digital Modem
PA_RAMP
PWR_CTRL
VDD_DIG
AGC Control
Low Power
Digital LDO
Digital LDO
RFp
RFn
ADC
POR
LNA
Mixers
PGA
IF LDO
BIAS
VR_IF
EZRadioPRO
Copyright © 2009 by Silicon Laboratories
2.20.09