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AD7761 데이터시트(PDF) 1 Page - Analog Devices

부품명 AD7761
상세설명  8-Channel, 16-Bit, Simultaneous Sampling ADC with Power Scaling, 110.8 kHz BW
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8-Channel, 16-Bit, Simultaneous Sampling
ADC with Power Scaling, 110.8 kHz BW
Data Sheet
AD7761
Rev. 0
Document Feedback
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
©2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
FEATURES
Precision ac and dc performance
8-channel simultaneous sampling
256 kSPS ADC output data rate per channel
97.7 dB dynamic range
110.8 kHz input bandwidth (−3 dB bandwidth (BW))
–120 dB THD, typical
±1 LSB INL, ±1 LSB offset error, ±5 LSB gain error
Optimized power dissipation vs. noise vs. input bandwidth
Selectable power, speed, and input bandwidth
Fast: highest speed; 110.8 kHz BW, 51.5 mW per channel
Median: half speed, 55.4 kHz BW, 27.5 mW per channel
Focus: lowest power, 13.8 kHz BW, 9.375 mW per channel
Input BW range: dc to 110.8 kHz
Programmable input bandwidth/sampling rates
Cyclic redundancy check (CRC) error checking on data interface
Daisy-chaining
Linear phase digital filter
Low latency sinc5 filter
Wideband brick wall filter: ±0.005 dB ripple to 102.4 kHz
Analog input precharge buffers
Power supply
AVDD1 = 5 V, AVDD2 = 2.25 V to 5.0 V
IOVDD = 2.5 V to 3.3 V or IOVDD = 1.8 V
64-lead LQFP package, no exposed pad
Temperature range: −40°C to +105°C
APPLICATIONS
Data acquisition systems: USB/PXI/Ethernet
Instrumentation and industrial control loops
Audio test and measurement
Vibration and asset condition monitoring
3-phase power quality analysis
Sonar
High precision medical electroencephalogram (EEG)/
electromyography (EMG)/electrocardiogram (ECG)
FUNCTIONAL BLOCK DIAGRAM
ADC
OUTPUT
DATA
SERIAL
INTERFACE
DIGITAL
FILTER
ENGINE
WIDEBAND
LOW RIPPLE
FILTER
SINC5
LOW LATENCY
FILTER
SPI
CONTROL
INTERFACE
1.8V
LDO
SYNC_IN
1.8V
LDO
BUFFERED
VCM
VCM
AIN1+
CH 1
AIN1–
AIN2+
CH 2
AIN2–
AIN3+
CH 3
AIN3–
AIN4+
CH 4
AIN4–
AIN5+
CH 5
AIN5–
AIN6+
CH 6
AIN6–
AIN7+
CH 7
AIN7–
AIN0+
CH 0
AIN0–
VCM
×8
PRECHARGE
REFERENCE
BUFFERS
SYNC_OUT
START
RESET
FORMAT1
FORMAT0
DRDY
DCLK
ST0/CS
PIN/SPI
ST1/SCLK
DEC0/SDO
DEC1/SDI
AVSS
XTAL2/MCLK
XTAL1
MODE3/GPIO3
TO
MODE0/GPIO0
FILTER/GPIO4
Σ-∆
ADC
Σ-∆
ADC
Σ-∆
ADC
Σ-∆
ADC
Σ-∆
ADC
Σ-∆
ADC
Σ-∆
ADC
Σ-∆
ADC
DOUT7
AVDD1A,
AVDD1B
DGND
AD7761
IOVDD
DREGCAP
REGCAPA,
REGCAPB
AVDD2A,
AVDD2B
REFx+ REFx–
OFFSET,
GAIN PHASE
CORRECTION
OFFSET,
GAIN PHASE
CORRECTION
OFFSET,
GAIN PHASE
CORRECTION
OFFSET,
GAIN PHASE
CORRECTION
OFFSET,
GAIN PHASE
CORRECTION
OFFSET,
GAIN PHASE
CORRECTION
OFFSET,
GAIN PHASE
CORRECTION
OFFSET,
GAIN PHASE
CORRECTION
DOUT1
DOUT0
DOUT2
DOUT3
DOUT4
DOUT5
DOUT6
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
×16 ANALOG INPUT
PRECHARGE BUFFERS (P)
Figure 1.


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