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LMX2430SLEX bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện LMX2430SLEX
Giải thích chi tiết về linh kiện  PLLatinum Dual High Frequency Synthesizer for RF Personal Communications
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LMX2430/LMX2433/LMX2434
PLLatinumDual 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
General Description
The LMX243x devices are high performance frequency syn-
thesizers 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 tech-
nique, 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 pro-
grammable 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.
Features
n
Low Current Consumption
n
2.25V to 2.75V Operation
n
Selectable Synchronous or Asynchronous Powerdown
Mode
n
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
n
Programmable Charge Pump Current Levels
RF and IF: 1 or 4 mA
n
FastlockTechnology with Integrated Timeout Counters
n
Digital Filtered Lock Detect Output
n
Analog Lock Detect Output (supports both Push-Pull
and Open Drain configurations)
n
1.8V MICROWIRE Logic Interface
n
Available in 20-Pin TSSOP and 20-Pin UTCSP
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)
Ultra Thin Chip Scale Package (SLE20A)
20053580
20053581
PLLatinumis a trademark of National Semiconductor Corporation.
May 2003
© 2003 National Semiconductor Corporation
DS200535
www.national.com


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