LMX2326TM Datasheet, PDF (1/19 Pages) Texas Instruments – PLLatinum Low Power Frequency Synthesizer for RF Personal Communications

OBSOLETE
LMX2306, LMX2316, LMX2326
www.ti.com
SNAS016G – MAY 2000 – REVISED APRIL 2013
PLLatinum™ Low Power Frequency Synthesizer for RF Personal Communications
LMX2306 550 MHz, LMX2316 1.2 GHz, LMX2326 2.8 GHz
Check for Samples: LMX2306, LMX2316, LMX2326
FEATURES
1
•2 2.3V to 5.5V Operation
• Ultra Low Current Consumption
• 2.5V V_CC JEDEC Standard Compatible
• Programmable or Logical Power Down Mode:
– I_CC = 1 μA Typical at 3V
• Dual Modulus Prescaler:
– LMX2306: 8/9
– LMX2316/26: 32/33
• Selectable Charge Pump Tri-state Mode
• Selectable FastLock Mode with Timeout
Counter
• MICROWIRE Interface
• Digital Lock Detect
APPLICATIONS
• Portable Wireless Communications (PCS/PCN,
Cordless)
• Wireless Local Area Networks (WLANs)
• Cable TV Tuners (CATV)
• Pagers
• Other Wireless Communication Systems
DESCRIPTION
The LMX2306/16/26 are monolithic, integrated
frequency synthesizers with prescalers that are
designed to be used to generate a very stable low
noise signal for controlling the local oscillator of an
RF transceiver. They are fabricated using TI's ABiC V
silicon BiCMOS 0.5μ process.
The LMX2306 contains a 8/9 dual modulus prescaler
while the LMX2316 and the LMX2326 have a 32/33
dual modulus prescaler. The LMX2306/16/26 employ
a digital phase locked loop technique. When
combined with a high quality reference oscillator and
loop filter, the LMX2306/16/26 provide the feedback
tuning voltage for a voltage controlled oscillator to
generate a low phase noise local oscillator signal.
Serial data is transferred into the LMX2306/16/26 via
a three wire interface (Data, Enable, Clock). Supply
voltage can range from 2.3V to 5.5V. The
LMX2306/16/26 feature ultra low current
consumption; LMX2306 - 1.7 mA at 3V, LMX2316 -
2.5 mA at 3V, and LMX2326 - 4.7 mA at 3V.
The LMX2306/16/26 synthesizers are available in a
16-pin TSSOP surface mount plastic package.
Functional Block Diagram
1
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.
2
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 © 2000–2013, Texas Instruments Incorporated