EVAL-ADF4151EB1Z AD [Analog Devices], EVAL-ADF4151EB1Z Datasheet

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EVAL-ADF4151EB1Z

Manufacturer Part Number
EVAL-ADF4151EB1Z
Description
Fractional-N/Integer-N PLL Synthesizer
Manufacturer
AD [Analog Devices]
Datasheet
Data Sheet
FEATURES
Fractional-N synthesizer and integer-N synthesizer
RF bandwidth to 3.5 GHz
3.0 V to 3.6 V power supply
1.8 V logic compatibility
Separate charge pump supply (V
Programmable dual-modulus prescaler of 4/5 or 8/9
Programmable RF output phase
3-wire serial interface
Analog and digital lock detect
Switched bandwidth fast lock mode
Cycle slip reduction
APPLICATIONS
Wireless infrastructure (W-CDMA, TD-SCDMA, WiMax, GSM,
Test equipment
Wireless LANs, CATV equipment
Clock generation
Rev. B
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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.
voltage (up to 5.5 V) in 3 V systems
PCS, DCS, DECT)
REF
DATA
RF
RF
CLK
IN
IN
LE
IN
+
DOUBLER
×2
DATA REGISTER
N COUNTER
INTEGER
REG
SDV
P
) allows extended tuning
DD
COUNTER
10-BIT R
FRACTION
REG
INTERPOLATOR
THIRD-ORDER
FRACTIONAL
AV
DD
x
MODULUS
DIVIDER
FUNCTIONAL BLOCK DIAGRAM
REG
÷2
FUNCTION
Fractional-N/Integer-N PLL Synthesizer
LATCH
DV
DD
Figure 1.
CE
DETECT
LOCK
V
COMPARATOR
P
PHASE
A
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
GENERAL DESCRIPTION
The
integer-N phase-locked loop (PLL) frequency synthesizers
if used with an external voltage controlled oscillator (VCO),
loop filter, and external reference frequency.
The
and software compatible with the ADF4350. The part 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))]. The
RF output phase is programmable for applications that require
a particular phase relationship between the output and the
reference. The
circuitry, leading to faster lock times without the need for
modifications to the loop filter.
Control of all the on-chip registers is through a simple 3-wire
interface. The device operates with a power supply ranging
from 3.0 V to 3.6 V that can be powered down when not in use.
The
GND
ADF4151
ADF4151
ADF4151
CP
R
MULTIPLEXER
CHARGE
SET
GND
PUMP
allows implementation of fractional-N or
is used with external VCO parts and is footprint
is available in a 5 mm × 5 mm package.
ADF4151
SD
GND
D
©2011 Analog Devices, Inc. All rights reserved.
GND
also features cycle slip reduction
FL
O
SWITCH
ADF4151
ADF4151
www.analog.com
MUXOUT
SW
LD
CP
OUT

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EVAL-ADF4151EB1Z Summary of contents

Page 1

Data Sheet FEATURES Fractional-N synthesizer and integer-N synthesizer RF bandwidth to 3.5 GHz 3 3.6 V power supply 1.8 V logic compatibility Separate charge pump supply (V ) allows extended tuning P voltage ( ...

Page 2

ADF4151 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Timing Characteristics ................................................................ 5 Absolute Maximum Ratings ............................................................ 6 Transistor Count ........................................................................... 6 ESD ...

Page 3

Data Sheet SPECIFICATIONS 3.3 V ± 10 VDD temperature range is −40°C to +85°C. Table 1. Parameter REF CHARACTERISTICS IN Input Frequency Input Sensitivity Input Capacitance Input Current RF INPUT CHARACTERISTICS ...

Page 4

... The PLL phase noise is composed of 1/f (flicker) noise plus the normalized PLL noise floor. The formula for calculating the 1/f noise contribution frequency (f and at a frequency offset (f) is given log(10 kHz/ log(f 1_f 5 Spurious measured on EVAL-ADF4151EB1Z with RF buffer between VCO output and RF input by-passed, using a Rohde & Schwarz FSUP signal source analyzer. B Version Min Typ Max Unit − ...

Page 5

Data Sheet TIMING CHARACTERISTICS 3.3 V ± 10 VDD Operating temperature range is −40°C to +85°C. Table 2. Parameter Limit (B Version ...

Page 6

ADF4151 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter GND ...

Page 7

Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 CLK Serial Clock Input. Data is clocked into the 32-bit shift register on the CLK rising edge. This input is a high impedance ...

Page 8

ADF4151 Pin No. Mnemonic Description 22 R Connecting a resistor between this pin and GND sets the charge pump output current. The nominal voltage SET bias at the where 5.1 kΩ. SET I = ...

Page 9

Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS 0 –5 –10 –15 –20 –25 –30 –35 –40 0 0.5 1.0 1.5 2.0 2.5 FREQUENCY (GHz) Figure 4. RF Input Sensitivity 6.0 5.5 5.0 4.5 4.5mA 4.0 3.5 3.0 2.5 2.25mA 2.0 1.5 1.13mA ...

Page 10

ADF4151 –60 –80 –100 –120 –140 –160 –180 1k 10k 100k FREQUENCY OFFSET (Hz) Figure 8. Integer-N Phase Noise and Spur Performance; Low Noise Mode; VCO = 1750 MHz, REF OUT PFD = 25 MHz, Loop Filter Bandwidth = 50 ...

Page 11

Data Sheet CIRCUIT DESCRIPTION REFERENCE INPUT SECTION The reference input stage is shown in Figure 14. SW1 and SW2 are normally closed switches. SW3 is normally open. When power-down is initiated, SW3 is closed and SW1 and SW2 are opened. ...

Page 12

ADF4151 MUXOUT AND LOCK DETECT The output multiplexer on the ADF4151 to access various internal points on the chip. The state of MUXOUT is controlled by M3, M2, and M1 (for details, see Figure 21). Figure 17 shows the MUXOUT ...

Page 13

Data Sheet REGISTER MAPS 16-BIT INTEGER VALUE (INT) DB31 DB30 DB29 DB28 DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 0 N16 N15 ...

Page 14

ADF4151 16-BIT INTEGER VALUE (INT) DB31 DB30 DB29 DB28 DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 0 N16 N15 N14 N13 N12 N11 ...

Page 15

Data Sheet LOW NOISE AND LOW SPUR MUXOUT MODES DB31 DB30 DB29 DB28 DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 0 L2 ...

Page 16

ADF4151 RESERVED DB31 DB30 DB29 DB28 DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 ...

Page 17

Data Sheet REGISTER 0 Control Bits With Bits[C3:C1] set Register 0 is programmed. Figure 19 shows the input data format for programming this register. 16-Bit Integer Value (INT) These 16 bits set the INT value, which ...

Page 18

ADF4151 MUXOUT The on-chip multiplexer is controlled by Bits[DB28:DB26] (see Figure 21). Reference Doubler Setting DB25 to 0 feeds the REF signal directly to the 10-bit IN R counter, disabling the doubler. Setting this bit to 1 multiplies the REF ...

Page 19

Data Sheet REGISTER 3 Control Bits With Bits[C3:C1] set Register 3 is programmed. Figure 22 shows the input data format for programming this register. Antibacklash Pulse Width Setting DB22 to 0 sets the PFD antibacklash pulse ...

Page 20

ADF4151 RF SYNTHESIZER—A WORKED EXAMPLE The following is an example of how to program the synthesizer [INT + (FRAC/MOD)] × [f OUT where the RF frequency output. OUT INT is the integer division factor. FRAC is ...

Page 21

Data Sheet A 13 MHz reference signal can be fed directly to the PFD, and the modulus can be programmed to 520 when in PDC mode (13 MHz/520 = 25 kHz). The modulus needs to be reprogrammed to 65 for ...

Page 22

ADF4151 FAST LOCK—AN EXAMPLE If a PLL has a reference frequency of 13 MHz and a required lock time of 50 µs, the PLL is set to wide bandwidth for 40 µs. This example assumes a modulus of ...

Page 23

Data Sheet Reference Spurs Reference spurs are generally not a problem in fractional-N synthesizers because the reference offset is far outside the loop bandwidth. However, any reference feedthrough mechanism that bypasses the loop can cause a problem. Feedthrough of low ...

Page 24

ADF4151 APPLICATIONS INFORMATION DIRECT CONVERSION MODULATOR Direct conversion architectures are increasingly being used to implement base station transmitters. Figure 29 shows how Analog Devices, Inc., parts can be used to implement such a system. The circuit block diagram shows the ...

Page 25

Data Sheet INTERFACING The ADF4151 has a simple SPI-compatible serial interface for writing to the device. CLK, DATA, and LE control the data transfer. When LE goes high, the 32 bits that have been clocked into the appropriate register on ...

Page 26

... ADF4151 OUTLINE DIMENSIONS PIN 1 INDICATOR 0.80 0.75 0.70 SEATING PLANE ORDERING GUIDE Model 1 Temperature Range ADF4151BCPZ −40°C to +85°C ADF4151BCPZ-RL7 −40°C to +85°C EVAL-ADF4151EB1Z RoHS Compliant Part. 5.10 0.30 5.00 SQ 0.25 4.90 0. 0.50 BSC 17 16 0.50 TOP VIEW 0.40 0.30 0.05 MAX 0.02 NOM COPLANARITY 0.08 0.20 REF COMPLIANT TO JEDEC STANDARDS MO-220-WHHD. Figure 32. 32-Lead Lead Frame Chip Scale Package [LFCSP_WQ × ...

Page 27

Data Sheet NOTES Rev Page ADF4151 ...

Page 28

ADF4151 NOTES ©2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D10265-0-12/11(B) Rev Page Data Sheet ...

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