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AD7262BSTZ датащи(PDF) 1 Page - Analog Devices

номер детали AD7262BSTZ
подробное описание детали  1 MSPS, 12-Bit, Simultaneous Sampling SAR ADC with PGA and Four Comparators
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домашняя страница  http://www.analog.com
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1 MSPS, 12-Bit, Simultaneous Sampling
SAR ADC with PGA and Four Comparators
AD7262
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2008 Analog Devices, Inc. All rights reserved.
FEATURES
Dual simultaneous sampling 12-bit, 2-channel ADC
True differential analog inputs
Programmable gain stage: ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16,
×24, ×32, ×48, ×64, ×96, ×128
Throughput rate per ADC
1 MSPS for AD7262
500 kSPS for AD7262-5
Analog input impedance: >1 GΩ
Wide input bandwidth
−3 dB bandwidth: 1.7 MHz at gain = 2
4 on-chip comparators
SNR: 73 dB typical at gain = 2, 66 dB typical at gain = 32
Device offset calibration, system gain calibration
On-chip reference: 2.5 V
–40°C to +105°C operation
High speed serial interface
SPI/QSPI™/MICROWIRE™/DSP compatible
48-lead LFCSP and LQFP packages
GENERAL DESCRIPTION
The AD7262/AD7262-5 are dual, 12-bit, high speed, low power,
successive approximation ADCs that operate from a single 5 V
power supply. The AD7262 features throughput rates of up to
1 MSPS per on-chip ADC. The AD7262-5 features throughput
rates of up to 500 kSPS. Two complete ADC functions allow
simultaneous sampling and conversion of two channels. Each
ADC is preceded by a true differential analog input with a PGA.
There are 14 gain settings available: ×1, ×2, ×3, ×4, ×6, ×8, ×12,
×16, ×24, ×32, ×48, ×64, ×96, and ×128.
The AD7262/AD7262-5 contain four comparators. Comparator A
and Comparator B are optimized for low power, while Compara-
tor C and Comparator D have fast propagation delays. The
AD7262/AD7262-5 feature a calibration function to remove any
device offset error and programmable gain adjust registers to
allow for input path (for example, sensor) offset and gain
compensation. The AD7262/AD7262-5 have an on-chip 2.5 V
reference that can be disabled if an external reference is preferred.
The AD7262/AD7262-5 are ideally suited for monitoring small
amplitude signals from a variety of sensors. They include all the
functionality needed for monitoring the position feedback
signals from a variety of analog encoders used in motor control
systems.
FUNCTIONAL BLOCK DIAGRAM
AGND
DGND
DOUTB
PD1
PD0/DIN
PD2
VREFA
AVCC
VA+
VA
VB+
VB
CB+
CB
CA+
CA
CD+
CD
CC+
CC
VREFB
CA_CBVCC
CA_CB_GND
CC_CDVCC
CC_CD_GND
COMP
COMP
COMP
COMP
COUTC
COUTB
COUTA
COUTD
DOUTA
PGA
T/H
BUF
T/H
BUF
PGA
12-BIT
SUCCESSIVE
APPROXIMATION
ADC
REF
12-BIT
SUCCESSIVE
APPROXIMATION
ADC
CONTROL
LOGIC
OUTPUT
DRIVERS
OUTPUT
DRIVERS
OUTPUT
DRIVERS
OUTPUT
DRIVERS
VDRIVE
G3
G2
G1
G0
CAL
CS
SCLK
REFSEL
AD7262
OUTPUT
DRIVERS
OUTPUT
DRIVERS
Figure 1.
PRODUCT HIGHLIGHTS
1.
Integrated PGA with a variety of flexible gain settings to
allow detection and conversion of low level analog signals.
2.
Each PGA is followed by a dual simultaneous sampling
ADC, featuring throughput rates of 1 MSPS per ADC for
the AD7262. The conversion results of both ADCs are
simultaneously available on separate data lines or in succes-
sion on one data line if only one serial port is available.
3.
Four integrated comparators that can be used to count
signals from pole sensors in motor control applications.
4.
Internal 2.5 V reference.


Аналогичный номер детали - AD7262BSTZ

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AD7262BSTZ AD-AD7262BSTZ Datasheet
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Аналогичное описание - AD7262BSTZ

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