Datasheet > ADF4218BRU-REEL

ADF4218BRU-REEL

更新时间： 2024-02-11 05:37:29

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管
页数	文件大小	规格书
20页	241K
描述
IC PLL FREQUENCY SYNTHESIZER, 2500 MHz, PDSO20, TSSOP-20, PLL or Frequency Synthesis Circuit

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ADF4218BRU-REEL 数据手册

Dual RF PLL Frequency Synthesizers

ADF4216/ADF4217/ADF4218

GENERAL DESCRIPTION

FEATURES

The ADF4216/ADF4217/ADF4218 are dual frequency synthe-

sizers that can be used to implement local oscillators (LOs) in

the upconversion and downconversion sections of wireless

receivers and transmitters. They can provide the LO for both

the RF and IF sections. They consist of a low-noise digital PFD

(Phase Frequency Detector), a precision charge pump, a pro-

grammable reference divider, programmable A and B counters,

and a dual-modulus prescaler (P/P+1). The A (6-bit) and B

(11-bit) counters, in conjunction with the dual modulus prescaler

(P/P+1), implement an N divider (N = BP + A). In addition,

the 14-bit reference counter (R Counter), allows selectable

REFIN frequencies at the PFD input. A complete PLL (Phase-

Locked Loop) can be implemented if the synthesizers are

used with an external loop ﬁlter and VCOs (Voltage Con-

trolled Oscillators).

ADF4216: 550 MHz/1.2 GHz

ADF4217: 550 MHz/2.0 GHz

ADF4218: 550 MHz/2.5 GHz

2.7 V to 5.5 V Power Supply

Selectable Charge Pump Currents

Selectable Dual Modulus Prescaler

IF: 8/9 or 16/17

RF: 32/33 or 64/65

3-Wire Serial Interface

Power-Down Mode

APPLICATIONS

Wireless Handsets (GSM, PCS, DCS, CDMA, WCDMA)

Base Stations for Wireless Radio (GSM, PCS, DCS,

CDMA, WCDMA)

Wireless LANS

Communications Test Equipment

CATV Equipment

Control of all the on-chip registers is via a simple 3-wire interface.

The devices operate with a power supply ranging from 2.7 V

to 5.5 V and can be powered down when not in use.

FUNCTIONAL BLOCK DIAGRAM

V 1

V 2

ADF4216/ADF4217/ADF4218

N = BP + A

11-BIT IF

B-COUNTER

PHASE

COMPARATOR

PRESCALER

CHARGE

PUMP

6-BIT IF

A-COUNTER

LOCK

DETECT

REF

OSCILLATOR

14-BIT IF

R-COUNTER

OUTPUT

MUX

MUXOUT

CLOCK

DATA

22-BIT

DATA

SDOUT

14-BIT IF

R-COUNTER

LOCK

DETECT

N = BP + A

11-BIT RF

B-COUNTER

CHARGE

PUMP

PRESCALER

6-BIT RF

A-COUNTER

PHASE

COMPARATOR

DGND

AGND

DGND

AGND

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

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ADF4218LBCC	ADI	暂无描述	获取价格
ADF4218LBRU	ROCHESTER	PLL FREQUENCY SYNTHESIZER, 3000 MHz, PDSO20, MO-153AC, TSSOP-20	获取价格
ADF4218LBRU-REEL	ADI	IC PLL FREQUENCY SYNTHESIZER, 3000 MHz, PDSO20, MO-153AC, TSSOP-20, PLL or Frequency Synth	获取价格

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