Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

AD7660 Fiches technique(PDF) 11 Page - Analog Devices

No de pièce AD7660
Description  16-Bit, 570 kSPS PulSAR Unipolar CMOS ADC
Download  24 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

AD7660 Fiches technique(HTML) 11 Page - Analog Devices

Back Button AD7660 Datasheet HTML 7Page - Analog Devices AD7660 Datasheet HTML 8Page - Analog Devices AD7660 Datasheet HTML 9Page - Analog Devices AD7660 Datasheet HTML 10Page - Analog Devices AD7660 Datasheet HTML 11Page - Analog Devices AD7660 Datasheet HTML 12Page - Analog Devices AD7660 Datasheet HTML 13Page - Analog Devices AD7660 Datasheet HTML 14Page - Analog Devices AD7660 Datasheet HTML 15Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 24 page
background image
REV. E
AD7664
–11–
CIRCUIT INFORMATION
The AD7664 is a very fast, low power, single-supply, precise
16-bit analog-to-digital converter (ADC). The AD7664 features
different modes to optimize performances according to the
applications.
In Warp Mode, the AD7664 is capable of converting 570,000
samples per second (570 kSPS).
The AD7664 provides the user with an on-chip track-and-hold,
successive-approximation ADC that does not exhibit any pipeline
or latency, making it ideal for multiple multiplexed channel
applications.
The AD7664 can be operated from a single 5 V supply and
interfaced to either 5 V or 3 V digital logic. It is housed in a
48-lead LQFP package or a 48-lead LFCSP package that
saves space and allows flexible configurations as either a
serial or parallel interface. The AD7664 is a pin-to-pin com-
patible upgrade of the AD7660.
CONVERTER OPERATION
The AD7664 is a successive-approximation analog-to-digital
converter based on a charge redistribution DAC. Figure 3
shows the simplified schematic of the ADC. The capacitive
DAC consists of an array of 16 binary weighted capacitors
and an additional LSB capacitor. The comparator’s negative
input is connected to a dummy capacitor of the same value as
the capacitive DAC array.
During the acquisition phase, the common terminal of the array
tied to the comparator’s positive input is connected to AGND
via SWA. All independent switches are connected to the analog
input IN. Thus, the capacitor array is used as a sampling capacitor
and acquires the analog signal on the IN input. Similarly, the
dummy capacitor acquires the analog signal on the INGND input.
When the
CNVST input goes LOW, a conversion phase is
initiated. When the conversion phase begins, SWA and SWB
are opened first. The capacitor array and the dummy capacitor
are then disconnected from the inputs and connected to the
REFGND input. Therefore, the differential voltage between IN
and INGND captured at the end of the acquisition phase is
applied to the comparator inputs, causing the comparator to
become unbalanced. By switching each element of the capacitor
array between REFGND or REF, the comparator input varies by
binary-weighted voltage steps (VREF/2, VREF/4, . . . VREF/65536).
The control logic toggles these switches, starting with the MSB
first, to bring the comparator back into a balanced condition. After
the completion of this process, the control logic generates the
ADC output code and brings BUSY output LOW.
Modes of Operation
The AD7664 features three modes of operation: Warp, Nor-
mal, and Impulse. Each of these modes is suitable for specific
applications.
The Warp Mode allows the fastest conversion rate up to 570 kSPS.
However, in this mode and this mode only, the full specified accuracy
is guaranteed only when the time between conversions does not
exceed 1 ms. If the time between two consecutive conversions is
longer than 1 ms, for instance, after power-up, the first conversion
result should be ignored. This mode makes the AD7664 ideal
for applications where both high accuracy and fast sample rate
are required.
SWA
COMP
SWB
IN
REF
REFGND
LSB
MSB
32,768C
INGND
16,384C
4C
2C
C
C
65,536C
CONTROL
LOGIC
SWITCHES
CONTROL
BUSY
OUTPUT
CODE
CNVST
Figure 3. ADC Simplified Schematic


Numéro de pièce similaire - AD7660

FabricantNo de pièceFiches techniqueDescription
logo
Analog Devices
AD7660 AD-AD7660 Datasheet
218Kb / 20P
   16-Bit, 100 kSPS CMOS ADC
REV. 0
AD7660 AD-AD7660 Datasheet
355Kb / 23P
   16-Bit, 570 kSPS CMOS ADC
REV. C
AD7660 AD-AD7660 Datasheet
336Kb / 23P
   16-Bit 1 MSPS SAR Unipolar ADC with Ref
REV. PrA
AD7660 AD-AD7660 Datasheet
804Kb / 28P
   16-Bit 500 kSPS PulSARTM Unipolar ADC with Reference
Rev. 0
AD7660 AD-AD7660 Datasheet
818Kb / 32P
   16-Bit, 750 kSPS, Unipolar/Bipolar Programmable Input PulSAR ADC
REV. 0
More results

Description similaire - AD7660

FabricantNo de pièceFiches techniqueDescription
logo
Analog Devices
AD7664 AD-AD7664_17 Datasheet
556Kb / 25P
   16-Bit, 570 kSPS PulSAR Unipolar CMOS ADC
AD7660 AD-AD7660_17 Datasheet
488Kb / 21P
   16-Bit, 100 kSPS PulSAR Unipolar CMOS ADC
AD7665ACPZ AD-AD7665ACPZ Datasheet
355Kb / 23P
   16-Bit, 570 kSPS CMOS ADC
REV. C
AD7665 AD-AD7665_17 Datasheet
413Kb / 24P
   16-Bit, 570 kSPS CMOS ADC
AD7665 AD-AD7665 Datasheet
348Kb / 24P
   16-Bit, 570 kSPS CMOS ADC
REV. 0
AD7664 AD-AD7664 Datasheet
392Kb / 19P
   16-Bit, 570 kSPS CMOS ADC
REV. 0
AD7665 AD-AD7665_15 Datasheet
355Kb / 23P
   16-Bit, 570 kSPS CMOS ADC
REV. C
AD7661 AD-AD7661 Datasheet
485Kb / 29P
   16-Bit 100 kSPS PulSAR Unipolar ADC with Reference
AD7652 AD-AD7652_15 Datasheet
804Kb / 28P
   16-Bit 500 kSPS PulSAR Unipolar ADC with Reference
REV. 0
AD7652 AD-AD7652 Datasheet
790Kb / 29P
   16-Bit 500 kSPS PulSAR Unipolar ADC with Reference
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


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
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