IA4420 Datasheet, PDF (1/29 Pages) List of Unclassifed Manufacturers – Universal ISM Band FSK Transceiver

WIRELESS DATASHEET
IA4420 Universal ISM Band
FSK Transceiver
DESCRIPTION
Integration’s IA4420 is a single chip, low power, multi-channel FSK transceiver
designed for use in applications requiring FCC or ETSI conformance for unlicensed
use in the 315, 433, 868 and 915 MHz bands. The IA4420 transceiver is a part of
Integration’s EZRadio^TM product line, which produces a flexible, low cost, and
highly integrated solution that does not require production alignments. The chip
is a complete analog RF and baseband transceiver including a multi-band PLL
synthesizer with PA, LNA, I/Q down converter mixers, baseband filters and
amplifiers, and an I/Q demodulator. All required RF functions are integrated.
Only an external crystal and bypass filtering are needed for operation.
The IA4420 features a completely integrated PLL for easy RF design, and its rapid
settling time allows for fast frequency-hopping, bypassing multipath fading and
interference to achieve robust wireless links. The PLL’s high resolution allows the
usage of multiple channels in any of the bands. The receiver baseband bandwidth
(BW) is programmable to accommodate various deviation, data rate and crystal
tolerance requirements. The transceiver employs the Zero-IF approach with I/Q
demodulation. Consequently, no external components (except crystal and
decoupling) are needed in most applications.
The IA4420 dramatically reduces the load on the microcontroller with the
integrated digital data processing features: data filtering, clock recovery, data
pattern recognition, integrated FIFO and TX data register. The automatic frequency
control (AFC) feature allows the use of a low accuracy (low cost) crystal. To
minimize the system cost, the IA4420 can provide a clock signal for the
microcontroller, avoiding the need for two crystals.
For low power applications, the IA4420 supports low duty cycle operation based
on the internal wake-up timer.
FUNCTIONAL BLOCK DIAGRAM
RF1 13
RF2 12
LNA
PA
MIX
I
AMP OC
MIX
Q
Self cal.
AMP OC
RF Parts
PLL & I/Q VCO
with cal.
RSSI
BB Amp/Filt./Limiter
I/Q
DEMOD
COMP
DQD
AFC
clk
Data Filt
CLK Rec ^data
FIFO
7
DCLK /
CFIL /
FFIT /
FSK /
6 _{DATA /}
nFFS
Data processing units
CLK div
8
CLK
Xosc
9
XTL /
REF
WTM
with cal.
LBD
Low Power parts
Controller
Bias
15 1
ARSSI SDI
2
3
4
5
10
16
SCK nSEL SDO nIRQ nRES nINT /
VDI
11 14
VSS VDD
I A4420
PIN ASSIGNMENT
revC and later
SDI
SCK
nSEL
SDO
nIRQ
FSK / DATA / nFFS
DCLK / CFIL / FFIT
CLK
nINT / VDI
ARSSI
VDD
RF1
RF2
VSS
nRES
XTL / REF
See back page for ordering information.
FEATURES
• Fully integrated (low BOM, easy design-in)
• No alignment required in production
• Fast-settling, programmable, high-resolution PLL synthesizer
• Fast frequency-hopping capability
• High bit rate (up to 115.2 kbps in digital mode and 256 kbps
in analog mode)
• Direct differential antenna input/output
• Integrated power amplifier
• Programmable TX frequency deviation (15 to 240 KHz)
• Programmable RX baseband bandwidth (67 to 400 kHz)
• Analog and digital RSSI outputs
• Automatic frequency control (AFC)
• Data quality detection (DQD)
• Internal data filtering and clock recovery
• RX synchron pattern recognition
• SPI compatible serial control interface
• Clock and reset signals for microcontroller
• 16 bit RX Data FIFO
• Two 8 bit TX data registers
• Low power duty cycle mode
• Standard 10 MHz crystal reference
• Wake-up timer
• 2.2 to 5.4 V supply voltage
• Low power consumption
• Low standby current (0.3 µA)
• Compact 16 pin TSSOP package
TYPICAL APPLICATIONS
• Remote control
• Home security and alarm
• Wireless keyboard/mouse and other PC peripherals
• Toy controls
• Remote keyless entry
• Tire pressure monitoring
• Telemetry
• Personal/patient data logging
• Remote automatic meter reading
IA4420-DS Rev 1.4r 0705
PRELIMINARY
1
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