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XE1203F
The XE1203F is a single-chip UHF transceiver integrated circuit intended for use as a low cost FSK transceiver to
establish a frequency-agile, half-duplex, bi-directional RF link, with NRZ (non-return to zero) data coding. Barker
encoder/decoder hardware can be activated to modulate/demodulate the transmitted signal to reduce the effects of
fixed-frequency in-band interference. The device is available in a MLPQ48 package and is designed to provide a
fully functional multi-channel FSK transceiver. It is intended for applications in the 868 MHz European band and the
North American 902-928 MHz ISM band. The single chip transceiver operates down to 2.4V and provides a low
power solution for battery-operated and power sensitive applications. The XE1203F is capable of operating data
rates up to 152.3 kbit/s, making it ideally suited for applications where high data rates are required.
1
FUNCTIONAL BLOCK DIAGRAM
QAMP
IAMP
MATCHING
NETWORK
RFA
LNA
FAMP
LPF
BBAMP
LIM
RSSI
FEI
CONTROL
DATA
SI
SO
SCK
EN
SWITCH
RFB
FAMP
LPF
BBAMP
LIM
PATTERN
MATCHING
PATTERN
LO_BUF
PHASE
SHIFTER
IREF
DEMOD
BITSYNC
11 Bits
LOGIC
CONTROL
DCLK
DATAIN
DATA
BARKER
DECODER
11 Bits
MMOD
DIVIDER
DIVCTL
modulator
/n
Synthesizer
CLKXTAL
BARKER
ENCODER
XE1203
MATCHING
NETWORK
RFOUT
PA
VCO
CH PUMP
PFD
OSCILLATOR
/n
CLOCK OUT
XE1203 TrueRF?
IREF
POR
TKA
TKB
LFB
XTA
XTB
CLKOUT
TSUPP TMOD(3:0)
POR
VCO
TANK
LOOP
FILTER
XTAL
Figure 1: XE1203F Block Diagram
? Semtech 2008
3
www.semtech.com
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