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ML2712 2.4GHz RF Transceiver
型号:   ML2712
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描述:   2.4GHz RF Transceiver
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品牌   MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
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PRELIMINARY
ML2712 2.4GHz RF Transceiver
GENERAL DESCRIPTION
The ML2712 combined with the ML2713 form a FSK
(Frequency Shift Keying) 2.4 GHz radio chipset. The
ML2712 contains the RF and PLL circuits for a half duplex
radio transceiver solution for IEEE802.11 and other
wireless communication protocols using the 2.4 GHz ISM
band.
The ML2712 is controlled using a three-wire programming
interface and three control lines. The transmit circuits
feature an RF down converter for a transmit frequency
translation loop and a Wideband Phase Detector for a
directly modulated VCO transmitter. An RF down
converter mixer is provided for receive. All frequency
generation circuits are integrated for the RF conversion,
the 1LO VCO and PLL plus a 2LO VCO and PLL for use
in dual conversion radios. In addition the ML2712
contains an 8 bit D/A & Comparator that may be used
together as a tracking A/D for Received Signal Strength
Indication measurement (RSSI).
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FEATURES
2.4GHz RF Down Converter
Programmable 2.2GHz and 236MHz Frequency
Synthesizers
External VCO tank circuits for flexibility
Compatibility with the OKI MSM7730 and similar
baseband controllers
Transmit Wideband Phase Comparator for closed loop
transmitter with >5MHz loop bandwidth
PLLs Programmable via 3 wire interface
48 pin TQFP 7mm body
3.0V to 5.5V operation
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APPLICATIONS
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2.4GHz Frequency Shift Key modulated radios
PC Card & Flashcard Wireless Transceivers
IEEE802.11FHSS Compatible 1 and 2Mbps Standard
SIMPLIFIED BLOCK DIAGRAM
ML2731
Bias
Controller
Transmit
Power
Amplifier
R. C.
Loop
Filter
ML2712
WB
Charge
Pump/WB
Phase
Comp
DAC
RSSI
Input
+
2LO VCO
2LO Loop
Filter &
Tank Circuit
Lock
Detect
3
3
LPF
PLL 2
PLL 1
x2
1LO Loop
Filter &
Tank Circuit
Reference
Frequency
Input
Baseband
Controller
(e.g., MSM7730B)
1LO VCO
32MHz
Clock
MUX
ML2713
Tx Regulator
Output
DATASHEET
January, 2000
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