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LMX1602SLB Datasheet

  • LMX1602SLB

  • PLLatinum⑩ Low Cost Dual Frequency Synthesizer

  • 14頁

  • NSC

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LMX1600/LMX1601/LMX1602 PLLatinum Low Cost Dual Frequency Synthesizer
PRELIMINARY
March 1998
LMX1600/LMX1601/LMX1602
PLLatinum
鈩?/div>
Low Cost Dual Frequency Synthesizer
LMX1600
LMX1601
LMX1602
2.0 GHz/500 MHz
1.1 GHz/500 MHz
1.1 GHz/1.1 GHz
Features
n
V
CC
= 2.7V to 3.6V operation
n
Low current consumption:
4 mA
@
3V (typ) for LMX1601
5 mA
@
3V (typ) for LMX1600 or LMX1602
n
PLL Powerdown mode: I
CC
= 1 碌A typical
n
Dual modulus prescaler:
鈥?2 GHz/500 MHz option:
(Main) 32/33 (Aux) 8/9
鈥?1.1 GHz/500 MHz option: (Main) 16/17 (Aux) 8/9
鈥?1.1 GHz/1.1 GHz option:
(Main) 16/17 (Aux) 16/17
n
Digital Filtered Lock Detects
General Description
The LMX1600/01/02 is part of a family of monolithic inte-
grated dual frequency synthesizers designed to be used in a
local oscillator subsystem for a radio transceiver. It is fabri-
cated using National鈥檚 0.5u ABiC V silicon BiCMOS process.
The LMX1600/01/02 contains two dual modulus prescalers,
four programmable counters, two phase detectors and two
selectable gain charge pumps necessary to provide the con-
trol voltage for two external loop filters and VCO loops. Digi-
tal filtered lock detects for both PLLs are included. Data is
transferred into the LMX1600/01/02 via a MICROWIRE
鈩?/div>
serial interface (Data, Clock, LE).
V
CC
supply voltage can range from 2.7V to 3.6V. The
LMX1600/01/02 features very low current consumption -
typically 4.0 mA at 3V for LMX1601, 5.0 mA at 3V for
LMX1600 or LMX1602. Powerdown for the PLL is hardware
controlled.
The LMX1600/01/02 is available in a 16 pin TSSOP surface
mount plastic package.
Applications
n
Cordless / Cellular / PCS phones
n
Other digital mobile phones
Functional Block Diagram
DS100129-1
TRI-STATE
廬
is a registered trademark of National Semiconductor Corporation.
MICROWIRE
鈩?/div>
and PLLatinum
鈩?/div>
are trademarks of National Semiconductor Corporation.
漏 1998 National Semiconductor Corporation
DS100129
www.national.com

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