What is LMX2411?

This electronic component, produced by the manufacturer "National Semiconductor", performs the same function as "Baseband Processor".

LMX2411 Datasheet PDF - National Semiconductor

Part Number LMX2411
Description Baseband Processor
Manufacturers National Semiconductor 
Logo National Semiconductor Logo 

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No Preview Available ! LMX2411 datasheet, circuit
September 1993
Baseband Processor for Radio Communications
General Description
The LMX2411 is a monolithic integrated baseband proces-
sor suitable for use in Digital European Cordless Telecom-
munications (DECT) systems as well as other mobile teleph-
ony and wireless communications applications It is fabricat-
ed using National’s ABiC IV BiCMOS process (fT e
15 GHz)
The LMX2411 contains both transmit and receive functions
The transmitter utilizes a low power high speed digital-to-
analog converter (DAC) and a mask programmable Read
Only Memory (ROM) to generate a Gaussian filter pulse
shape The receiver includes a high speed low power volt-
age comparator for making hard decisions on incoming data
and a CMOS switch coupled with a sample and hold circuit
for DC compensation Supply voltage can range from 2 85V
to 3 6V The LMX2411 features very low current consump-
tion of 2 5 mA transmit and 5 mA receive (steady state) It
also has separate power down pins for transmit and receive
functions to further reduce power consumption
The LMX2411 can be used with the LMX2216B LNA Mixer
the LMX2240 IF Receiver and the LMX2320 Phase-Locked
Loop to form a complete RF front end solution These chips
form the major blocks of an RF front end solution for DECT
The LMX2411 is available in a 16-pin JEDEC surface mount
plastic package
Y High speed voltage comparator (40 ns settling time)
Y Generates Gaussian filtered modulating signal for a di-
rect VCO modulator
Y Bit rates to 1 152 Mb s (DECT)
Y Supports 10 368 13 824 and 18 432 MHz system
clocks through pin selection
Y On-chip DC compensation circuit
Y Average current consumption 0 6 mA for DECT handset
(burst mode operation)
Y Power down mode for extended battery life
Y Compatible with Sierra SC14400 and Philips PCD5040
DECT Burst Mode Controllers
Y Digital European Cordless Telecommunications (DECT)
Y Portable wireless communications (PCS PCN cordless)
Y Wireless local area networks (WLANs)
Y Other wireless communications systems
This data sheet contains the design specifications for product development
Specifications may change in any manner without notice
Functional Block Diagram
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL W 11911
TL W 11911 – 1
RRD-B30M115 Printed in U S A

LMX2411 equivalent
Typical Performance Characteristics (Continued)
DAC Output at Start of Transmit Burst vs Time
DC Comp Circuit Response vs Time
(from Full Discharge of Hold Capacitor)
(See Application Circuit)
TL W 11911 – 6
Typical Application Block Diagram
TL W 11911 – 7
TL W 11911 – 8


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Featured Datasheets

Part NumberDescriptionMFRS
LMX2411The function is Baseband Processor. National SemiconductorNational Semiconductor

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