lmx2322 National Semiconductor Corporation, lmx2322 Datasheet

lmx2322

Manufacturer Part Number

lmx2322

Description

Pllatinumtm 2.0 Ghz Frequency Synthesizer For Rf Personal Communications

Manufacturer

National Semiconductor Corporation

Datasheet

1.LMX2322.pdf (14 pages)

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LMX2322 PLLatinum

2.0 GHz Frequency Synthesizer

for RF Personal Communications

General Description

The LMX2322 is a high performance frequency synthesizer with

integrated 32/33 dual modulus prescaler designed for RF operation

up to 2.0 GHz.

technique, the LMX2322’s linear phase detector characteristics

can generate very stable, low noise control signals for UHF and

VHF voltage controlled oscillators.

Serial data is transferred into the LMX2322 via a three-line

MICROWIRE

is from 2.7 V to 3.9 V. The LMX2322 features very low current

consumption, typically 3.5 mA at 3.75V.

provides 4mA output current.

The LMX2322 is manufactured using National’s ABiC V BiCMOS

process and is packaged in a 16 pin TSSOP and a 16 pin Chip

Scale Package (CSP).

Functional Block Diagram

Rev 1.6

OSCin

fin

interface (Data, LE, Clock). Supply voltage range

CLOCK

DATA

Using a proprietary digital phase locked loop

OSC

Prescaler

32/33

Microwire

Interface

18-Bit

R Counter

N Counter

10-Bit

15-Bit

The charge pump

9/24/1998

Features

Applications

RF operation up to 2.0 GHz

2.7 V to 3.9 V operation

Low current consumption: I cc = 3.5 mA (typ) at V cc = 3.75 V

Dual modulus prescaler: 32/33

Internal balanced, low leakage charge pump

Cellular telephone systems (GSM, NADC, CDMA, PDC, PHS)

Personal wireless communications (DCS-1800, DECT, CT-1+)

Wireless local area networks (WLANs)

Other wireless communication systems

Comp

Phase

Advance Information

Charge

Pump

CPo

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