Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

AD7265ACP Datasheet(PDF) 10 Page - Analog Devices

No. de pieza AD7265ACP
Descripción Electrónicos  Differential Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
Logo AD - Analog Devices

AD7265ACP Datasheet(HTML) 10 Page - Analog Devices

Back Button AD7265ACP Datasheet HTML 6Page - Analog Devices AD7265ACP Datasheet HTML 7Page - Analog Devices AD7265ACP Datasheet HTML 8Page - Analog Devices AD7265ACP Datasheet HTML 9Page - Analog Devices AD7265ACP Datasheet HTML 10Page - Analog Devices AD7265ACP Datasheet HTML 11Page - Analog Devices AD7265ACP Datasheet HTML 12Page - Analog Devices AD7265ACP Datasheet HTML 13Page - Analog Devices AD7265ACP Datasheet HTML 14Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 16 page
background image
AD7265
Preliminary Technical Data
THEORY OF OPERATION
CAPACITIVE
DAC
CAPACITIVE
DAC
CONTROL
LOGIC
COMPARATOR
SW3
SW1
A
A
B
B
SW2
CS
CS
VIN+
VIN–
VREF
CIRCUIT INFORMATION
The AD7265 is a fast, micropower, dual 12-bit, single supply,
A/D converter that operates from a 2.7 V to 5.25 V supply.
When operated from either a 5 V or 3V supply, the AD7265 is
capable of throughput rates of 1 MSPS.
The AD7265 contains two on-chip differential track-and-hold
amplifiers, two successive approximation A/D converters, and a
serial interface with two separate data output pins, and is
housed in a 32-lead LFCSP package, which offers the user
considerable space-saving advantages over alternative solutions.
The serial clock input accesses data from the part but also
provides the clock source for each successive approximation
ADC. The analog input range for the part can be selected to be a
0 V to VREF input or a 2 × VREF input with the analog inputs
configured as either single ended or differential. The AD7265
has an on-chip 2.5 V reference that can be overdriven if an
external reference is preferred.
Figure 3. ADC Acquisition Phase
When the ADC starts a conversion (Figure 4), SW3 opens and
SW1 and SW2 move to position B, causing the comparator to
become unbalanced. Both inputs are disconnected once the
conversion begins. The control logic and the charge redistribu-
tion DACs are used to add and subtract fixed amounts of charge
from the sampling capacitor arrays to bring the comparator
back into a balanced condition. When the comparator is
rebalanced, the conversion is complete. The control logic
generates the ADC output code. The output impedances of the
sources driving the VIN+ and VIN– pins must be matched;
otherwise, the two inputs will have different settling times,
resulting in errors.
The AD7265 also features power-down options to allow power
saving between conversions. The power-down feature is
implemented across the standard serial interface, as described in
the Modes of Operation section.
CONVERTER OPERATION
The AD7265 has two successive approximation analog-to-
digital converters, each based around two capacitive DACs.
Figure 3 and Figure 4 show simplified schematics of one of
these ADCs in acquisition and conversion phase, respectively.
The ADC is comprised of control logic, a SAR, and two
capacitive DACs. In Figure 3 (the acquisition phase), SW3, is
closed, SW1 and SW2 are in position A, the comparator is held
in a balanced condition, and the sampling capacitor arrays
acquire the differential signal on the input.
CAPACITIVE
DAC
CAPACITIVE
DAC
CONTROL
LOGIC
COMPARATOR
SW3
SW1
A
A
B
B
SW2
CS
CS
VIN+
VIN–
VREF
Figure 4. ADC Conversion Phase
Rev. PrA | Page 10 of 16


Número de pieza similar - AD7265ACP

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Analog Devices
AD7265 AD-AD7265 Datasheet
810Kb / 29P
   Differential/Single-Ended Input, 1 MSPS, 12-Bit, 3-Channel Dual SAR ADC
AD7265BCP AD-AD7265BCP Datasheet
690Kb / 28P
   Differential/Single-Ended Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
REV. A
AD7265BCPZ AD-AD7265BCPZ Datasheet
690Kb / 28P
   Differential/Single-Ended Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
REV. A
AD7265BCPZ AD-AD7265BCPZ Datasheet
810Kb / 29P
   Differential/Single-Ended Input, 1 MSPS, 12-Bit, 3-Channel Dual SAR ADC
AD7265BCPZ-REEL AD-AD7265BCPZ-REEL Datasheet
690Kb / 28P
   Differential/Single-Ended Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
REV. A
More results

Descripción similar - AD7265ACP

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Analog Devices
AD7266 AD-AD7266 Datasheet
752Kb / 17P
   Differential Input, Dual 2 MSPS, 12-Bit, 3-Channel SAR ADC
Rev. PrG
AD7265 AD-AD7265_15 Datasheet
812Kb / 29P
   Differential/Single-Ended Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
REV. A
AD7265BCPZ AD-AD7265BCPZ Datasheet
690Kb / 28P
   Differential/Single-Ended Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR ADC
REV. A
AD7265 AD-AD7265_17 Datasheet
810Kb / 29P
   Differential/Single-Ended Input, 1 MSPS, 12-Bit, 3-Channel Dual SAR ADC
AD7356 AD-AD7356 Datasheet
191Kb / 18P
   Differential Input, Dual, 5 MSPS, 12-Bit, SAR ADC
Rev. PrC
AD7352 AD-AD7352_17 Datasheet
515Kb / 21P
   Differential Input, Dual, Simultaneous ampling, 3 MSPS, 12-Bit, SAR ADC
AD7352 AD-AD7352 Datasheet
518Kb / 20P
   Differential Input, Dual, Simultaneous Sampling, 3 MSPS, 12-Bit, SAR ADC
REV. 0
AD7352 AD-AD7352_15 Datasheet
623Kb / 21P
   Differential Input, Dual, Simultaneous Sampling, 3 MSPS, 12-Bit, SAR ADC
REV. A
AD7266BSUZ AD-AD7266BSUZ Datasheet
644Kb / 28P
   Differential/Single-Ended Input, Dual 2 MSPS, 12-Bit, 3-Channel SAR ADC
REV. B
AD7266 AD-AD7266_15 Datasheet
889Kb / 29P
   Differential/Single-Ended Input, Dual 2 MSPS, 12-Bit, 3-Channel SAR ADC
REV. B
More results


Html Pages

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


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
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