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ADF4159CCPZ-RL7 View Datasheet(PDF) - Analog Devices

Part Name
Description
Manufacturer
ADF4159CCPZ-RL7 Datasheet PDF : 36 Pages
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Data Sheet
Direct Modulation/Fast Waveform Generating,
13 GHz, Fractional-N Frequency Synthesizer
ADF4159
FEATURES
GENERAL DESCRIPTION
RF bandwidth to 13 GHz
High and low speed FMCW ramp generation
25-bit fixed modulus allows subhertz frequency resolution
PFD frequencies up to 110 MHz
Normalized phase noise floor of −224 dBc/Hz
FSK and PSK functions
Sawtooth, triangular, and parabolic waveform generation
Ramp superimposed with FSK
Ramp with 2 different sweep rates
Ramp delay, frequency readback, and interrupt functions
Programmable phase control
2.7 V to 3.45 V analog power supply
1.8 V digital power supply
Programmable charge pump currents
3-wire serial interface
Digital lock detect
ESD performance: 3000 V HBM, 1000 V CDM
The ADF4159 is a 13 GHz, fractional-N frequency synthesizer
with modulation and both fast and slow waveform generation
capability. The part uses a 25-bit fixed modulus, allowing subhertz
frequency resolution.
The ADF4159 consists of a low noise digital phase frequency
detector (PFD), a precision charge pump, and a programmable
reference divider. The Σ-Δ-based fractional interpolator allows
programmable fractional-N division. The INT and FRAC registers
define an overall N divider as N = INT + (FRAC/225).
The ADF4159 can be used to implement frequency shift keying
(FSK) and phase shift keying (PSK) modulation. Frequency sweep
modes are also available to generate various waveforms in the
frequency domain, for example, sawtooth and triangular wave-
forms. The ADF4159 features cycle slip reduction circuitry, which
enables faster lock times without the need for modifications to
the loop filter.
APPLICATIONS
FMCW radars
Communications test equipment
Communications infrastructure
Control of all on-chip registers is via a simple 3-wire interface. The
ADF4159 operates with an analog power supply in the range of
2.7 V to 3.45 V and a digital power supply in the range of 1.62 V
to 1.98 V. The device can be powered down when not in use.
FUNCTIONAL BLOCK DIAGRAM
AVDD DVDD SDVDD
VP
RSET
ADF4159
REFIN
×2
DOUBLER
5-BIT
R COUNTER
÷2
DIVIDER
HIGH-Z
MUXOUT
OUTPUT
MUX
CE
TXDATA
DGND
SDOUT
DVDD
RDIV
NDIV
LOCK
DETECT
THIRD-ORDER
FRACTIONAL
INTERPOLATOR
+ PHASE
FREQUENCY
DETECTOR
REFERENCE
SW2
CHARGE
PUMP
CSR
FAST LOCK
SWITCH
CP
SW1
+
N COUNTER
RFINA
RFINB
CLK
DATA
LE
32-BIT
DATA
REGISTER
FRACTION
VALUE
MODULUS
225 VALUE
INTEGER
VALUE
AGND
DGND
SDGND
Figure 1.
CPGND
Rev. B
Document Feedback
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
 

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