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LMX2330U Datasheet

  • LMX2330U

  • National Semiconductor [PLLatinum Ultra Low Power Dual Freq...

  • NSC

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LMX2330U/LMX2331U/LMX2332U PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF
Personal Communications
July 2002
LMX2330U/LMX2331U/LMX2332U
PLLatinum
鈩?/div>
Ultra Low Power Dual Frequency
Synthesizer for RF Personal Communications
LMX2330U 2.5 GHz/600 MHz
LMX2331U 2.0 GHz/600 MHz
LMX2332U 1.2 GHz/600 MHz
General Description
The LMX233xU devices are high performance frequency
synthesizers with integrated dual modulus prescalers. The
LMX233xU devices are designed for use as RF and IF local
oscillators for dual conversion radio transceivers.
A 32/33 or a 64/65 prescale ratio can be selected for the 2.5
GHz LMX2330U RF synthesizer. A 64/65 or a 128/129 pres-
cale ratio can be selected for both the LMX2331U and
LMX2332U RF synthesizers. The IF circuitry contains an 8/9
or a 16/17 prescaler. Using a proprietary digital phase locked
loop technique, the LMX233xU devices generate very
stable, low noise control signals for RF and IF voltage con-
trolled oscillators. Both the RF and IF synthesizers include a
two-level programmable charge pump. The RF synthesizer
has dedicated Fastlock circuitry.
Serial data is transferred to the devices via a three-wire
interface (Data, LE, Clock). Supply voltages from 2.7V to
5.5V are supported. The LMX233xU family features ultra low
current consumption:
LMX2330U (2.5 GHz) 鈥?3.3 mA, LMX2331U (2.0 GHz)
鈥?2.9 mA, LMX2332U (1.2 GHz) 鈥?2.5 mA at 3.0V.
The LMX233xU devices are available in 20-Pin TSSOP and
24-Pin CSP surface mount plastic packages.
Features
n
n
n
n
Ultra Low Current Consumption
Upgrade and Compatible to LMX233xL Family
2.7V to 5.5V Operation
Selectable Synchronous or Asynchronous Powerdown
Mode:
I
CC-PWDN
= 1 碌A(chǔ) typical
Selectable Dual Modulus Prescaler:
LMX2330U
RF: 32/33 or 64/65
LMX2331U
RF: 64/65 or 128/129
LMX2332U
RF: 64/65 or 128/129
LMX2330U/31U/32U IF: 8/9 or 16/17
Selectable Charge Pump TRI-STATE
廬
Mode
Programmable Charge Pump Current Levels
RF and IF: 0.95 or 3.8 mA
Selectable Fastlock
鈩?/div>
Mode for the RF Synthesizer
Push-Pull Analog Lock Detect Output
Available in 20-Pin TSSOP and 24-Pin Chip Scale
Package (CSP)
n
n
n
n
n
n
Applications
n
Mobile Handsets
(GSM, GPRS, W-CDMA, CDMA, PCS, AMPS, PDC,
DCS)
n
Cordless Handsets
(DECT, DCT)
n
Wireless Data
n
Cable TV Tuners
Thin Shrink Small Outline Package (MTC20)
Chip Scale Package (SLB24A)
10136680
10136681
PLLatinum
鈩?/div>
is a trademark of National Semiconductor Corporation.
漏 2002 National Semiconductor Corporation
DS101366
www.national.com

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