XE1283SKC433XE1 Semtech, XE1283SKC433XE1 Datasheet - Page 13

• Manufacturer Part Number: XE1283SKC433XE1
• Description: KIT STARTER FOR XE1283 433MHZ
• Manufacturer: Semtech
• Series: TrueRF™r
• Type: Transceiverr

Specifications of XE1283SKC433XE1

• Contents: Processor Boards, Modules, Batteries, Antennas, Serial Cable and Software CD
• For Use With/related Products: XE1283 (433MHz)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

4
4.1
The XE1203F is a direct conversion (Zero-IF) half-duplex data transceiver. It includes a receiver, a transmitter, a
frequency synthesizer and some service blocks. The circuit operates in the three ISM frequency ranges (434 MHz,
868MHz and 915MHz) and uses 2-level FSK modulation. In a typical application, the XE1203F is programmed by the
microcontroller through the 3-wire serial bus SI, SO, SCK to write to and read from the configuration registers.
The XE1203F consists of 4 main functional blocks.
The receiver converts the incoming 2-level FSK modulated signal into a synchronized bit stream. The receiver is
composed of a low-noise amplifier, down-conversion mixers, base band filters, base band amplifiers, limiters,
demodulator and bit synchronizer. The bit synchronizer transforms the data output of the demodulator into a glitch-free bit
© Semtech 2005
GENERAL DESCRIPTION
XE1203F BRIEF DESCRIPTION
MATCHING
NETWORK
MATCHING
NETWORK
RFA
RFB
RFOUT
PA
LNA
LO_BUF
VCO
TKA
TANK
VCO
SHIFTER
PHASE
DIVIDER
MMOD
TKB
Figure 6: XE1203 functional block diagram
FAMP
FAMP
FILTER
LOOP
LFB
IREF
CH PUMP
DIVCTL
PFD
LPF
LPF
CLKXTAL
BBAMP
BBAMP
13
OSCILLATOR
Synthesizer
XTA
XTAL
modulator
/n
LIM
XTB
LIM
CLKOUT
DEMOD
XE1203F
CLOCK OUT
/n
RSSI
FEI
TSUPP TMOD(3:0)
DECODER
MATCHING
BITSYNC
BARKER
PATTERN
11 Bits
CONTROL
DATA
ENCODER
CONTROL
BARKER
XE1283
LOGIC
11 Bits
IREF
POR
PATTERN
POR
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SWITCH
DATAIN
DCLK
DATA
SCK
SO
EN
SI