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AD7617BSTZ Datasheet(PDF) 1 Page - Analog Devices

Part # AD7617BSTZ
Description  16-Channel DAS with 14-Bit, Bipolar Input, Dual Simultaneous Sampling ADC
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7617BSTZ Datasheet(HTML) 1 Page - Analog Devices

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16-Channel DAS with 14-Bit, Bipolar Input,
Dual Simultaneous Sampling ADC
Data Sheet
AD7617
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
©2017 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
FEATURES
16-channel, dual, simultaneously sampled inputs
Independently selectable channel input ranges
True bipolar: ±10 V, ±5 V, ±2.5 V
Single 5 V analog supply and 2.3 V to 3.6 V VDRIVE supply
Fully integrated data acquisition solution
Analog input clamp protection
Input buffer with 1 MΩ analog input impedance
First-order antialiasing analog filter
On-chip accurate reference and reference buffer
Dual 14-bit SAR ADC
Throughput rate: 2× 1 MSPS per channel pair
Oversampling capability with digital filter
Flexible sequencer with burst mode
Flexible parallel/serial interface
SPI/QSPI/MICROWIRE/DSP compatible
Optional CRC error checking
Hardware/software configuration
Performance
85.3 dB typical SNR at 500 kSPS (2× oversampling)
85 dB typical SNR at 1 MSPS
−103 dB typical THD at ±10 V range
±0.3 LSB INL (typical), ±0.99 LSB DNL (maximum)
8 kV ESD analog input pins only
On-chip self detect function
80-lead LQFP package
APPLICATIONS
Power line monitoring
Protective relays
Multiphase motor control
Instrumentation and control systems
Data acquisition systems (DASs)
GENERAL DESCRIPTION
The AD7617 is a 14-bit, DAS that supports dual simultaneous
sampling of 16 channels. The AD7617 operates from a single +5 V
supply and can accommodate ±10 V, ±5 V, and ±2.5 V true bipolar
input signals while sampling at throughput rates up to 1 MSPS
per channel pair with 85 dB signal-to-noise ratio (SNR). Higher
SNR performance can be achieved with the on-chip oversampling
mode (85.3 dB for an oversampling ratio (OSR) of 2).
The input clamp protection circuitry can tolerate voltages up to
±21 V. The AD7617 has 1 MΩ analog input impedance, regardless
of sampling frequency. The single-supply operation, on-chip
filtering, and high input impedance eliminate the need for
driver op amps and external bipolar supplies.
The device contains analog input clamp protection, a dual, 14-bit
charge redistribution successive approximation register (SAR)
analog-to-digital converter (ADC), a flexible digital filter, a
2.5 V reference and reference buffer, and high speed serial and
parallel interfaces. The AD7617 is serial peripheral interface
(SPI)/QSPI™/DSP/MICROWIRE compatible.
FUNCTIONAL BLOCK DIAGRAM
Figure 1. AD7617 Functional Block Diagram
RFB
1MΩ
1MΩ
RFB
FIRST-
ORDER LPF
RFB
1MΩ
1MΩ
RFB
FIRST-
ORDER LPF
V0A
V0AGND
RFB
1MΩ
1MΩ
RFB
V7A
V7AGND
V0B
V0BGND
V7B
V7BGND
9:1
MUX
BUSY
CONVST
CONTROL
INPUTS
CLK OSC
REFINOUT REFSEL
SER/PAR
SER1W
OSR
DIGITAL
FILTER
2.5V
REF
REFCAP
NOTES
1. MULTIFUNCTION PINS, SUCH AS DB15/OS2, ARE REFERRED TO BY A SINGLE FUNCTION OF THE PIN,
FOR EXAMPLE, DB15, WHEN ONLY THAT FUNCTION IS RELEVANT. REFER TO THE PIN CONFIGURATION
AND FUNCTION DESCRIPTIONS SECTION FOR MORE INFORMATION.
SERIAL
REGCAP REGCAPD
1.8V
DLDO
VCC
AD7617
9:1
MUX
14-BIT
SAR
14-BIT
SAR
OS2 TO OS0
VDRIVE
VCC
ALDO
2:1
MUX
HW_RNGSEL0, HW_RNGSEL1
CHSEL2 TO CHSEL0
SEQEN
FLEXIBLE
SEQUENCER
BURST
RESET
AGND
DGND
DB15 TO DB0
SDOx/SDI
PARALLEL
FIRST-
ORDER LPF
RFB
1MΩ
1MΩ
RFB
FIRST-
ORDER LPF
1.8V
ALDO
CLAMP
CLAMP
CLAMP
CLAMP
CLAMP
CLAMP
CLAMP
CLAMP


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