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ADF4118BRU 参数 Datasheet PDF下载

ADF4118BRU图片预览
型号: ADF4118BRU
PDF下载: 下载PDF文件 查看货源
内容描述: 射频锁相环频率合成器 [RF PLL Frequency Synthesizers]
分类和应用: 射频
文件页数/大小: 20 页 / 227 K
品牌: AD [ ANALOG DEVICES ]
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FEATURES
ADF4116: 550 MHz
ADF4117: 1.2 GHz
ADF4118: 3.0 GHz
2.7 V to 5.5 V Power Supply
Separate V
P
Allows Extended Tuning Voltage in 3 V
Systems
Selected Charge Pump Currents
Dual Modulus Prescaler
ADF4116: 8/9
ADF4117/ADF4118: 32/33
3-Wire Serial Interface
Digital Lock Detect
Power-Down Mode
Fast Lock Mode
APPLICATIONS
Base Stations for Wireless Radio (GSM, PCS, DCS,
CDMA, WCDMA)
Wireless Handsets (GSM, PCS, DCS, CDMA, WCDMA)
Wireless LANS
Communications Test Equipment
CATV Equipment
RF PLL Frequency Synthesizers
ADF4116/ADF4117/ADF4118
GENERAL DESCRIPTION
The ADF4116 family of frequency synthesizers can be used
to implement local oscillators in the up-conversion and down-
conversion sections of wireless receivers and transmitters. They
consist of a low-noise digital PFD (Phase Frequency Detector),
a precision charge pump, a programmable reference divider,
programmable A and B counters and a dual-modulus prescaler
(P/P+1). The A (5-bit) and B (13-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 imple-
mented if the synthesizer is used with an external loop filter and
VCO (Voltage Controlled Oscillator).
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
AV
DD
DV
DD
V
P
CPGND
REFERENCE
ADF4116/ADF4117/ADF4118
REF
IN
14-BIT
R COUNTER
14
R COUNTER
LATCH
CLK
DATA
LE
A, B COUNTER
LATCH
18
13
AV
DD
MUX
N = BP + A
RF
IN
A
RF
IN
B
13-BIT
B COUNTER
LOAD
LOAD
5-BIT
A COUNTER
M3
M2
M1
FL
O
MUXOUT
HIGH Z
21-BIT
INPUT REGISTER
19
FUNCTION
LATCH
LOCK
DETECT
PHASE
FREQUENCY
DETECTOR
CHARGE
PUMP
CP
SD
OUT
FROM
FUNCTION LATCH
SD
OUT
PRESCALER
P/P +1
FL
O
SWITCH
5
CE
AGND
DGND
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
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000