Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

ADF4210 Datenblatt(PDF) 9 Page - Analog Devices

Teilenummer ADF4210
Bauteilbeschribung  Dual RF/IF PLL Frequency Synthesizers
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADF4210 Datenblatt(HTML) 9 Page - Analog Devices

Back Button ADF4210_15 Datasheet HTML 5Page - Analog Devices ADF4210_15 Datasheet HTML 6Page - Analog Devices ADF4210_15 Datasheet HTML 7Page - Analog Devices ADF4210_15 Datasheet HTML 8Page - Analog Devices ADF4210_15 Datasheet HTML 9Page - Analog Devices ADF4210_15 Datasheet HTML 10Page - Analog Devices ADF4210_15 Datasheet HTML 11Page - Analog Devices ADF4210_15 Datasheet HTML 12Page - Analog Devices ADF4210_15 Datasheet HTML 13Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 20 page
background image
REV. A
ADF4210/ADF4211/ADF4212/ADF4213
–9–
TEMPERATURE – C
100
–40
0
20
40
60
80
–100
–70
–80
–90
–60
–20
VDD = 3V
VP = 5V
TPC 19. ADF4213 Reference Spurs vs. Temperature
(836 MHz, 30 kHz, 3 kHz)
CIRCUIT DESCRIPTION
REFERENCE INPUT SECTION
The reference input stage is shown below in Figure 2. 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. This ensures that there is no loading of the REFIN pin
on power-down.
BUFFER
TO R COUNTER
REFIN
100k
NC
SW2
SW3
NO
NC
SW1
POWER-DOWN
CONTROL
NC = NO CONNECT
Figure 2. Reference Input Stage
RF/IF INPUT STAGE
The RF/IF input stage is shown in Figure 3. It is followed by a
2-stage limiting amplifier to generate the CML (Current Mode
Logic) clock levels needed for the prescaler.
AVDD
AGND
2k
2k
1.6V
BIAS
GENERATOR
RFINA
RFINB
Figure 3. RF/IF Input Stage
PRESCALER (P/P + 1)
The dual modulus prescaler (P/P + 1), along with the A and
B counters, enables the large division ratio, N, to be realized
(N = PB + A). The dual-modulus prescaler, operating at CML
levels, takes the clock from the RF/IF input stage and divides
it down to a manageable frequency for the CMOS A and B
counters in the RF and If sections. The prescaler in both
sections is programmable. It can be set in software to 8/9, 16/17,
32/33, or 64/65. See Tables IV and VI. It is based on a syn-
chronous 4/5 core.
RF/IF A AND B COUNTERS
The A and B CMOS counters combine with the dual modulus
prescaler to allow a wide ranging division ratio in the PLL
feedback counter. The counters are specified to work when the
prescaler output is 200 MHz or less, when VDD = 5 V. Typically,
they will work with 250 MHz output from the prescaler. Thus,
with an RF input frequency of 2.5 GHz, a prescaler value of
16/17 is valid, but a value of 8/9 is not valid.
Pulse Swallow Function
The A and B counters, in conjunction with the dual modulus
prescaler make it possible to generate output frequencies which
are spaced only by the Reference Frequency divided by R. The
equation for the VCO frequency is as follows:
fVCO = [(P
× B) + A] × f
REFIN/R
fVCO = Output Frequency of external voltage controlled
oscillator (VCO).
P
= Preset modulus of dual modulus prescaler (8/9,
16/17, etc.).
B
= Preset Divide Ratio of binary 13-bit counter
(3 to 8191).
A
= Preset Divide Ratio of binary 6-bit A counter
(0 to 63).
fREFIN = External reference frequency oscillator.
R
= Preset divide ratio of binary 15-bit programmable refer-
ence counter (1 to 32767).
13-BIT B-
COUNTER
5-BIT A-
COUNTER
PRESCALER
P/P + 1
FROM RF
INPUT STAGE
MODULUS
CONTROL
N = BP + A
LOAD
LOAD
TO PFD
Figure 4. RF/IF A and B Counters
RF/IF COUNTER
The 15-bit RF/IF R counter allows the input reference fre-
quency to be divided down to product the input clock to the
phase frequency detector (PFD). Division ratios from 1 to
32767 are allowed.


Ähnliche Teilenummer - ADF4210_15

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Analog Devices
ADF4210BCP AD-ADF4210BCP Datasheet
251Kb / 20P
   Dual RF/IF PLL Frequency Synthesizers
REV. A
ADF4210BRU AD-ADF4210BRU Datasheet
251Kb / 20P
   Dual RF/IF PLL Frequency Synthesizers
REV. A
More results

Ähnliche Beschreibung - ADF4210_15

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Analog Devices
ADF4213 AD-ADF4213_15 Datasheet
252Kb / 20P
   Dual RF/IF PLL Frequency Synthesizers
REV. A
ADF4212 AD-ADF4212_15 Datasheet
252Kb / 20P
   Dual RF/IF PLL Frequency Synthesizers
REV. A
ADF4210 AD-ADF4210 Datasheet
251Kb / 20P
   Dual RF/IF PLL Frequency Synthesizers
REV. A
ADF4211 AD-ADF4211_15 Datasheet
252Kb / 20P
   Dual RF/IF PLL Frequency Synthesizers
REV. A
ADF4207 AD-ADF4207_15 Datasheet
226Kb / 20P
   Dual RF PLL Frequency Synthesizers
REV. 0
ADF4217 AD-ADF4217_15 Datasheet
247Kb / 20P
   Dual RF PLL Frequency Synthesizers
REV. 0
ADF4206 AD-ADF4206 Datasheet
206Kb / 20P
   Dual RF PLL Frequency Synthesizers
REV. 0
ADF4218 AD-ADF4218 Datasheet
227Kb / 20P
   Dual RF PLL Frequency Synthesizers
REV. 0
ADF4111 AD-ADF4111_15 Datasheet
428Kb / 28P
   RF PLL Frequency Synthesizers
Rev. F
ADF4116 AD-ADF4116_15 Datasheet
486Kb / 28P
   RF PLL Frequency Synthesizers
REV. D
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


Datenblatt Download

Go To PDF Page


Link URL




Privatsphäre und Datenschutz
ALLDATASHEETDE.COM
War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Linktausch   |   Hersteller
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