Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

AD974ARS Datenblatt(PDF) 8 Page - Analog Devices

Teilenummer AD974ARS
Bauteilbeschribung  4-Channel, 16-Bit, 200 kSPS Data Acquisition System
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD974ARS Datenblatt(HTML) 8 Page - Analog Devices

Back Button AD974ARS Datasheet HTML 4Page - Analog Devices AD974ARS Datasheet HTML 5Page - Analog Devices AD974ARS Datasheet HTML 6Page - Analog Devices AD974ARS Datasheet HTML 7Page - Analog Devices AD974ARS Datasheet HTML 8Page - Analog Devices AD974ARS Datasheet HTML 9Page - Analog Devices AD974ARS Datasheet HTML 10Page - Analog Devices AD974ARS Datasheet HTML 11Page - Analog Devices AD974ARS Datasheet HTML 12Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 20 page
background image
REV. A
AD974
–8–
can be read after the conversion is complete. The external clock
can be either a continuous or discontinuous clock. A discontinu-
ous clock can be either normally low or normally high when
inactive. In the case of the discontinuous clock, the AD974 can be
configured to either generate or not generate a SYNC output
(with a continuous clock a SYNC output will always be produced).
Each of the methods will be described in the following sections
and are illustrated in Figures 4 through 9. It should be noted
that all timing diagrams assume that the receiving device is
latching data on the rising edge of the external clock. If the
falling edge of DATACLK is used then, in the case of a discon-
tinuous clock, one less clock pulse is required than shown in
Figures 4 through 7 to latch in a 16-bit word. Note that data is
valid on the falling edge of a clock pulse (for t13 greater than t18)
and the rising edge of the next clock pulse.
The AD974 provides error correction circuitry that can correct
for an improper bit decision made during the first half of the
conversion cycle. Normally the occurrence of an incorrect bit
decision during a conversion cycle is irreversible. This error
occurs as a result of noise during the time of the decision or due
to insufficient settling time. As the AD974 is performing a
conversion it is important that transitions not occur on digital
input/output pins or degradation of the conversion result could
occur. This is particularly important during the second half of
the conversion process. For this reason it is recommended that
when an external clock is being provided it be a discontinuous
clock that is not toggling during the time that
BUSY is low or,
more importantly, that it does not transition during the latter
half of
BUSY low.
EXTERNAL DISCONTINUOUS CLOCK DATA READ
AFTER CONVERSION WITH NO SYNC OUTPUT
GENERATED
Figure 4 illustrates the method by which data from conversion
“n” can be read after the conversion is complete using a discon-
tinuous external clock without the generation of a SYNC
output. After a conversion is complete, indicated by
BUSY
returning high, the result of that conversion can be read while
CS is Low and R/C is high. In this mode CS can be tied low.
The MSB will be valid on the first falling edge and the second
rising edge of DATACLK. The LSB will be valid on the 16th
falling edge and the 17th rising edge of DATACLK. A mini-
mum of 16 clock pulses are required for DATACLK if the
receiving device will be latching data on the falling edge of
DATACLK. A minimum of 17 clock pulses are required for
DATACLK if the receiving device will be latching data on the
rising edge of DATACLK.
The advantage of this method of reading data is that data is not
being clocked out during a conversion and therefore conversion
performance is not degraded.
When reading data after the conversion is complete, with the
highest frequency permitted for DATACLK (15.15 MHz), the
maximum possible throughput is approximately 195 kHz, and
not the rated 200 kHz.
EXT
DATACLK
R/
C
BUSY
SYNC
DATA
t12
0
12
3
14
15
16
t13
t14
t1
t2
t21
t18
t18
BIT 15
(MSB)
BIT 14
BIT 13
BIT 1
BIT 0
(LSB)
Figure 4. Conversion and Read Timing Using an External Discontinuous Data Clock
(EXT/
INT Set to Logic High, CS Set to Logic Low)


Ähnliche Teilenummer - AD974ARS

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Analog Devices
AD974ARS AD-AD974ARS Datasheet
202Kb / 20P
   4-Channel, 16-Bit, 200 kSPS Data Acquisition System
REV. A
AD974ARS AD-AD974ARS Datasheet
237Kb / 21P
   4-Channel, 16-Bit, 200 kSPS Data Acquisition System
More results

Ähnliche Beschreibung - AD974ARS

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Analog Devices
AD974 AD-AD974 Datasheet
202Kb / 20P
   4-Channel, 16-Bit, 200 kSPS Data Acquisition System
REV. A
AD974 AD-AD974_15 Datasheet
206Kb / 20P
   4-Channel, 16-Bit, 200 kSPS Data Acquisition System
REV. A
AD974 AD-AD974_17 Datasheet
237Kb / 21P
   4-Channel, 16-Bit, 200 kSPS Data Acquisition System
AD1362 AD-AD1362 Datasheet
431Kb / 8P
   16-Channel,12-Bit Data Acquisition System
REV. A
logo
API Technologies Corp
HS9403 APITECH-HS9403 Datasheet
3Mb / 4P
   16-Channel, 12-Bit Data Acquisition System
logo
Analog Devices
AD1362 AD-AD1362_15 Datasheet
437Kb / 8P
   16 Channel 12 Bit Data Acquisition System
REV. A
AD8401 AD-AD8401_15 Datasheet
228Kb / 12P
   8-Bit, 4-Channel Data Acquisition System
REV. 0
AD8401 AD-AD8401 Datasheet
225Kb / 12P
   8-Bit, 4-Channel Data Acquisition System
REV. 0
AD363 AD-AD363 Datasheet
682Kb / 8P
   Complete 16-Channel,12-Bit Data Acquisition System
ADAS3023 AD-ADAS3023 Datasheet
617Kb / 32P
   16-Bit, 8-Channel Simultaneous Sampling Data Acquisition System
REV. 0
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