LMX4168 Radio Transceiver for DECT
ADVANCED INFORMATION
March 2004
LMX4168
Radio Transceiver for DECT
1.0 General description
The LMX4168 is a radio transceiver integrated circuit opti-
mized for the Digital Enhanced Cordless Telecommunica-
tions (DECT) system. The transceiver, when combined with
a power amplifier and a Tx/Rx switch, implements a com-
plete DECT radio transceiver compliant with the ETSI
CTR6 standard. The LMX4168 interfaces to National Semi-
conductor鈥檚 SC144XX DECT family of baseband proces-
sors.
The LMX4168 integrates a complete transmitter, consisting
of a phase locked loop, VCO and PA driver. The receiver
contains LNA, quadrature downconverter, polyphase fil-
ter/combiner, automatic gain control, and demodulator.
The LMX4168 operates from a single 2.25鈥?.75V supply.
The LMX4168 is manufactured in National鈥檚 0.25碌m
CMOS technology, and is packaged in a 44 pin LLP pack-
age
2.0 Features
鈻?/div>
Highly integrated 1.9 GHz low-IF CMOS transceiver
鈻?/div>
Down conversion to half the DECT channel spacing (864
kHz)
鈻?/div>
On-chip channel select filter
鈻?/div>
On-chip Voltage Controlled Oscillator (VCO)
鈻?/div>
On-chip low noise amplifier (LNA)
鈻?/div>
Open-loop modulation
鈻?/div>
On-chip timing control
鈻?/div>
Four digital (5 mA) output ports
鈻?/div>
0 dBm PA driver output
鈻?/div>
-95 dBm sensitivity
鈻?/div>
2.5V operation
鈻?/div>
Small 44 pin Leadless Leadframe Package
3.0 Applications
鈻?/div>
(DECT) Digital Enhanced Cordless Telecommunications
4.0 System Diagram
AGC
DEMOD.
DEMOD.
BALUN
LNA
RSSI
0擄
90擄
DATA
MICROWIRE
PA
BALUN
PADR
X2
CLOCK
LE
RX_DATA
PORTS
PLL
BIAS
TXDATA
R REF
漏
2004 National Semiconductor Corporation
www.national.com
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英文版
Radio Transceiver for DECT
NSC
-
英文版
Radio Transceiver for DECT
NSC [Natio...
-
英文版
Radio Transceiver for DECT
NSC
-
英文版
Radio Transceiver for DECT
NSC [Natio...
-
英文版
Radio Transceiver for DECT
NSC
-
英文版
Radio Transceiver for DECT
NSC [Natio...
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