Motore di ricerca datesheet componenti elettronici
  Italian  ▼
ALLDATASHEETIT.COM

X  

ADF4150HVBCPZ-RL7 Scheda tecnica(PDF) 11 Page - Analog Devices

Il numero della parte ADF4150HVBCPZ-RL7
Spiegazioni elettronici  High Voltage, Fractional-N
Download  28 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

ADF4150HVBCPZ-RL7 Scheda tecnica(HTML) 11 Page - Analog Devices

Back Button ADF4150HVBCPZ-RL7 Datasheet HTML 7Page - Analog Devices ADF4150HVBCPZ-RL7 Datasheet HTML 8Page - Analog Devices ADF4150HVBCPZ-RL7 Datasheet HTML 9Page - Analog Devices ADF4150HVBCPZ-RL7 Datasheet HTML 10Page - Analog Devices ADF4150HVBCPZ-RL7 Datasheet HTML 11Page - Analog Devices ADF4150HVBCPZ-RL7 Datasheet HTML 12Page - Analog Devices ADF4150HVBCPZ-RL7 Datasheet HTML 13Page - Analog Devices ADF4150HVBCPZ-RL7 Datasheet HTML 14Page - Analog Devices ADF4150HVBCPZ-RL7 Datasheet HTML 15Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 28 page
background image
ADF4150HV
Rev. 0 | Page 11 of 28
CIRCUIT DESCRIPTION
REFERENCE INPUT SECTION
The reference input stage is shown in Figure 14. The SW1 and
SW2 switches are normally closed. The SW3 switch is normally
open. When power-down is initiated, SW3 is closed, and SW1
and SW2 are opened. In this way, no loading of the REFIN pin
occurs during power-down.
BUFFER
TO R COUNTER
REFIN
100kΩ
NC
SW2
SW3
NO
NC
SW1
POWER-DOWN
CONTROL
Figure 14. Reference Input Stage
RF N DIVIDER
The RF N divider allows a division ratio in the PLL feedback
path. The division ratio is determined by the INT, FRAC, and
MOD values, which build up this divider (see Figure 15).
THIRD-ORDER
FRACTIONAL
INTERPOLATOR
FRAC
VALUE
MOD
VALUE
INT
VALUE
RF N DIVIDER
N = INT + FRAC/MOD
FROM
VCO OUTPUT/
OUTPUT DIVIDERS
TO PFD
N COUNTER
Figure 15. RF N Divider
INT, FRAC, MOD, and R Counter Relationship
The INT, FRAC, and MOD values, in conjunction with the
R counter, make it possible to generate output frequencies that
are spaced by fractions of the PFD frequency. For more informa-
tion, see the RF Synthesizer—A Worked Example section.
The RF VCO frequency (RFOUT) equation is
RFOUT = (fPFD/RF Divider) × [INT + (FRAC/MOD)]
(1)
where:
RFOUT is the output frequency of the external voltage controlled
oscillator (VCO).
RF Divider is the output divider that divides down the VCO
frequency.
INT is the preset divide ratio of the binary 16-bit counter (23 to
32,767 for the 4/5 prescaler, 75 to 65,535 for the 8/9 prescaler).
FRAC is the numerator of the fractional division (0 to MOD − 1).
MOD is the preset fractional modulus (2 to 4095).
The PFD frequency (fPFD) equation is
fPFD = REFIN × [(1 + D)/(R × (1 + T))]
(2)
where:
REFIN is the reference input frequency.
D is the REFIN doubler bit.
R is the preset divide ratio of the binary 10-bit programmable
reference counter (1 to 1023).
T is the REFIN divide-by-2 bit (0 or 1).
Integer-N Mode
If FRAC = 0 and the DB8 (LDF) bit in Register 2 is set to 1,
the synthesizer operates in integer-N mode. The DB8 bit in
Register 2 should be set to 1 for integer-N digital lock detect.
R Counter
The 10-bit R counter allows the input reference frequency
(REFIN) to be divided down to produce the reference clock
to the PFD. Division ratios from 1 to 1023 are allowed.
PHASE FREQUENCY DETECTOR (PFD) AND HIGH
VOLTAGE CHARGE PUMP
The phase frequency detector (PFD) takes inputs from the
R counter and N counter and produces an output proportional
to the phase and frequency difference between them. Figure 16
is a simplified schematic of the phase frequency detector.
U3
CLR2
Q2
D2
U2
DOWN
UP
HIGH
HIGH
CPOUT
–IN
+IN
CHARGE
PUMP
DELAY
CLR1
Q1
D1
U1
Figure 16. PFD Simplified Schematic
The PFD includes a delay element that sets the width of the
antibacklash pulse to 4.2 ns. This pulse ensures that there is
no dead zone in the PFD transfer function and provides a
consistent reference spur level.
The high voltage charge pump is designed on an Analog
Devices, Inc., proprietary high voltage process and allows the
charge pump to output voltages as high as 29 V when powered
by a 30 V supply. The high voltage charge pump removes the
need for active filtering when interfacing to a high voltage VCO.


Codice articolo simile - ADF4150HVBCPZ-RL7

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
Analog Devices
ADF4150 AD-ADF4150 Datasheet
818Kb / 28P
   Fractional-N/Integer-N PLL Synthesizer
ADF4150 AD-ADF4150 Datasheet
486Kb / 28P
   Fractional-N/Integer-N PLL Synthesizer
REV. 0
ADF4150BCPZ AD-ADF4150BCPZ Datasheet
486Kb / 28P
   Fractional-N/Integer-N PLL Synthesizer
REV. 0
ADF4150BCPZ-RL7 AD-ADF4150BCPZ-RL7 Datasheet
486Kb / 28P
   Fractional-N/Integer-N PLL Synthesizer
REV. 0
More results

Descrizione simile - ADF4150HVBCPZ-RL7

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
Analog Devices
ADF4152HV AD-ADF4152HV Datasheet
634Kb / 27P
   High Voltage, Fractional-N/Integer N PLL Synthesizer
logo
NXP Semiconductors
SA8025A PHILIPS-SA8025A Datasheet
456Kb / 23P
   Low-voltage 1.8GHz fractional-N synthesizer
1996 Oct 15
SA7025 PHILIPS-SA7025 Datasheet
304Kb / 22P
   Low-voltage 1GHz fractional-N synthesizer
1996 Aug 6
SA7016 PHILIPS-SA7016 Datasheet
232Kb / 18P
   1.3GHz low voltage fractional-N synthesizer
1999 Nov 04
SA8016 PHILIPS-SA8016 Datasheet
252Kb / 20P
   2.5GHz low voltage fractional-N synthesizer
1999 Nov 04
logo
Texas Instruments
TRF2050 TI-TRF2050 Datasheet
563Kb / 34P
[Old version datasheet]   LOW-VOLTAGE 1.2-GHz FRACTIONAL-N/INTEGER-N SYNTHESIZER
TRF2056 TI1-TRF2056 Datasheet
327Kb / 24P
[Old version datasheet]   LOW-VOLTAGE 1,2-GHz FRACTIONAL-N/INTEGER-N SYNTHESIZER
TRF2050 TI1-TRF2050_00 Datasheet
542Kb / 34P
[Old version datasheet]   LOW-VOLTAGE 1.2-GHz FRACTIONAL-N/INTEGER-N SYNTHESIZER
logo
Integrated Device Techn...
ICS8430002 IDT-ICS8430002 Datasheet
843Kb / 27P
   High-Performance Fractional-N Frequency Synthesizer
logo
Analog Devices
ADF4153 AD-ADF4153 Datasheet
354Kb / 24P
   Fractional-N Frequency Synthesizer
REV. A
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28


Scheda tecnica Scarica

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEETIT.COM
Lei ha avuto il aiuto da alldatasheet?  [ DONATE ] 

Di alldatasheet   |   Richest di pubblicita   |   contatti   |   Privacy Policy   |   scambio Link   |   Ricerca produttore
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com