參數(shù)資料
型號(hào): ADF4153
廠商: Analog Devices, Inc.
英文描述: Fractional-N Frequency Synthesizer
中文描述: 分?jǐn)?shù)N頻率合成器
文件頁(yè)數(shù): 1/24頁(yè)
文件大?。?/td> 354K
代理商: ADF4153
Fractional-N Frequency Synthesizer
ADF4153
FEATURES
RF bandwidth 500 MHz to 4 GHz
2.7 V to 3.3 V power supply
Separate V
P
allows extended tuning voltage
Programmable dual-modulus prescaler 4/5, 8/9
Programmable charge pump currents
3-wire serial interface
Analog and digital lock detect
Power-down mode
Pin compatible with the
ADF4110/ADF4111/ADF4112/ADF4113 and ADF4106
Programmable modulus on fractional-N synthesizer
Trade-off noise versus spurious performance
Rev.
A
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 that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
Tel: 781.329.4700
www.analog.com
APPLICATIONS
CATV equipment
Base stations for mobile radio (GSM, PCS, DCS,
CDMA, WCDMA)
Wireless handsets (GSM, PCS, DCS, CDMA, WCDMA)
Wireless LANs
Communications test equipment
GENERAL DESCRIPTION
The ADF4153 is a fractional-N frequency synthesizer that
implements local oscillators in the upconversion and
downconversion sections of wireless receivers and transmitters.
It consists of a low noise digital phase frequency detector
(PFD), a precision charge pump, and a programmable reference
divider. There is a Σ-Δ based fractional interpolator to allow
programmable fractional-N division. The INT, FRAC, and
MOD registers define an overall N divider (N = (INT +
(FRAC/MOD))). In addition, the 4-bit reference counter (R
counter) allows selectable REFIN frequencies at the PFD input.
A complete phase-locked loop (PLL) can be implemented if the
synthesizer is used with an external loop filter and a voltage
controlled oscillator (VCO).
Control of all on-chip registers is via a simple 3-wire interface.
The device operate with a power supply ranging from 2.7 V to
3.3 V and can be powered down when not in use.
FUNCTIONAL BLOCK DIAGRAM
LOCK
DETECT
N-COUNTER
CP
RFCP3 RFCP2 RFCP1
REFERENCE
DATA
LE
24-BIT
DATA
REGISTER
CLOCK
REF
IN
AV
DD
AGND
V
DD
V
DD
DGND
R
DIV
N
DIV
DGND
CPGND
DV
DD
V
P
SDV
DD
R
SET
RF
IN
A
RF
IN
B
OUTPUT
MUX
MUXOUT
+
HIGH Z
PHASE
FREQUENCY
DETECTOR
ADF4153
THIRD ORDER
FRACTIONAL
INTERPOLATOR
MODULUS
REG
FRACTION
REG
INTEGER
REG
CURRENT
SETTING
×
2
DOUBLER
4-BIT
R COUNTER
CHARGE
PUMP
0
Figure 1.
相關(guān)PDF資料
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