Preliminary Rev. 0.4 6/09 Copyright © 2009 by Silicon Laboratories Si4432
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Si4432
Si4432 ISM TRANSCEIVER
Features
Applications
Description
Silicon Laboratories’ Si4432 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 offers advanced radio features including continuous frequency
coverage from 240–930 MHz and adjustable output power of up to +20 dBm. The
Si4432’s high level of integration offers reduced BOM cost while simplifying the
overall system design. The extremely low receive sensitivity (–118 dBm) coupled
with 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.
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’s digital receive architecture features a high-performance ADC and
DSP based modem which performs demodulation, filtering, and packet handling
for increased flexibility and performance. This digital architecture simplifies
system design while allowing for the use of lower-end MCUs. The direct digital
transmit modulation and automatic PA power ramping ensure precise transmit
modulation and reduced spectral spreading ensuring compliance with FCC and
ETSI regulations.
Frequency Range = 240–930 MHz
Sensitivity = –118 dBm
+20 dBm Max Output Power
Configurable +11 to +20 dBm
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
Digital RSSI
Wake-on-radio
Auto-frequency calibration (AFC)
Antenna diversity and TR switch
control
Configurable packet structure
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
FSK, GFSK, and OOK modulation
Low BOM
Power-on-reset (POR)
Remote control
Home security & alarm
Teleme tr y
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
Patents pending
Ordering Information:
See page 156.
Pin Assignments
VDD_RF 1
2
3
4
15
14
13
12
6789
19 18 1720
TX
RXp
RXn
SCLK
SDI
SDO
VDD_DIG
NC
GPIO_0
GPIO_1
GPIO_2
XIN
XOUT
SDN
nIRQ
Metal
Paddle
511VR_IF NC
10
16
VDR
nSEL
Si4432
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