LMX2430_14 Datasheet, PDF (1/48 Pages) Texas Instruments – PLLatinum™ Dual High Frequency Synthesizer for RF Personal Communications

LMX2430, LMX2433, LMX2434
www.ti.com
SNAS187B – MAY 2004 – REVISED MAY 2004
PLLatinum™ Dual High Frequency Synthesizer for RF Personal Communications
LMX2430 3.0 GHz/0.8 GHz
LMX2433 3.6 GHz/1.7 GHz
LMX2434 5.0 GHz/2.5 GHz
Check for Samples: LMX2430, LMX2433, LMX2434
FEATURES
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•234 Low Current Consumption
• 2.25V to 2.75V Operation
• Selectable Synchronous or Asynchronous
Powerdown Mode
• Selectable Dual Modulus Prescaler:
– LMX2430
RF: 8/9 or 16/17
– LMX2433
RF: 8/9 or 16/17
– LMX2434
RF: 16/17 or 32/33
– LMX243x
IF: 8/9 or 16/17
• Programmable Charge Pump Current Levels
– RF and IF: 1 or 4 mA
• Fastlock™ Technology with Integrated
Timeout Counters
• Digital Filtered Lock Detect Output
• Analog Lock Detect Output (supports both
Push-Pull and Open Drain configurations)
• 1.8V MICROWIRE Logic Interface
• Available in 20-Pin TSSOP and 20-Pin UTCSP
APPLICATIONS
• Mobile Handsets
– (GSM, GPRS, W-CDMA, CDMA, PCS, AMPS,
PDC, DCS)
• Cordless Handsets
– (DECT, DCT)
• Wireless Data
• Cable TV Tuners
DESCRIPTION
The LMX243x devices are high performance frequency synthesizers with integrated dual modulus prescalers.
The LMX243x devices are designed for use as RF and IF local oscillators for dual conversion radio transceivers.
A 32/33 or a 16/17 prescale ratio can be selected for the 5.0 GHz LMX2434 RF synthesizer. An 8/9 or a 16/17
prescale ratio can be selected for both the LMX2430 and LMX2433 RF synthesizers. The IF circuitry contains an
8/9 or a 16/17 prescaler. Using a proprietary digital phase locked loop technique, the LMX243x devices generate
very stable, low noise control signals for RF and IF voltage controlled oscillators. Both the RF and IF
synthesizers include a two-level programmable charge pump. Both the RF and IF synthesizers have dedicated
Fastlock circuitry with integrated timeout counters. Furthermore, only a single word write is required to power up
and tune the synthesizers to a new frequency.
Serial data is transferred to the devices via a three-wire interface (DATA, LE, CLK). A low voltage logic interface
allows direct connection to 1.8V devices. Supply voltages from 2.25V to 2.75V are supported . The LMX243x
family features low current consumption:
LMX2430 (3.0 GHz/ 0.8 GHz)—2.8 mA/ 1.4 mA, LMX2433 (3.6 GHz/ 1.7 GHz) —3.2 mA/ 2.0 mA, LMX2434 (5.0
GHz/ 2.5 GHz)—4.6 mA/ 2.4 mA at 2.50V.
The LMX243x devices are available in 20-Pin TSSOP and 20-Pin UTCSP surface mount plastic packages.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PLLatinum is a trademark of Texas Instruments.
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Fastlock is a trademark of dcl_owner.
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All other trademarks are the property of their respective owners.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004, Texas Instruments Incorporated