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Analog Devices Semiconductor Electronic Components Datasheet

AD7606C-18 Datasheet

Simultaneous Sampling ADC

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Data Sheet
8-Channel DAS with 18-Bit, 1 MSPS Bipolar
Input, Simultaneous Sampling ADC
AD7606C-18
FEATURES
CALIBRATION AND DIAGNOSTICS
18-bit ADC with 1 MSPS on all channels
Input buffer with 1 MΩ minimum analog input impedance (RIN)
Single 5 V analog supply and 1.71 V to 5.25 V VDRIVE
Per channel selectable analog input ranges
Bipolar single-ended: ±12.5 V, ±10 V, ±6.25 V, ±5 V, ±2.5 V
Unipolar single-ended: 0 V to 12.5 V, 0 V to 10 V, 0 V to 5 V
Bipolar differential: ±20 V, ±12.5 V, ±10 V, ±5 V
Two bandwidth options: 25 kHz and 220 kHz, per channel
Flexible digital filter, oversampling ratio up to 256
−40°C to +125°C operating range
±21 V input clamp protection with 6 kV ESD
Pin to pin compatible to the AD7606B, AD7608, and AD7609
Performance
93 dB typical SNR for ±20 V bipolar differential range
102 dB SNR, oversampling by 32
−100 dB typical THD for all other ranges
TUE = 0.05% of FSR maximum, external reference
±0.5 ppm/°C typical PFS and NFS error drift
±3 ppm/°C typical reference temperature coefficient
Per channel system phase, offset, and gain calibration
Analog input open circuit detection feature
Self diagnostics and monitoring features
CRC error checking on read and write data and registers
APPLICATIONS
Power line monitoring
Protective relays
Multiphase motor control
Instrumentation and control systems
Data acquisition systems
COMPANION PRODUCTS
Voltage References: ADR4525, LT6657, LTC6655
Digital Isolators: ADuM142E, ADuM6422A, ADuM5020,
ADuM5028
AD7606x Family Software Model
Additional companion products on the AD7606C-18 product
page
FUNCTIONAL BLOCK DIAGRAM
5V
100nF
1µF
AVCC REGCAP
5V
100nF
AVCC REGCAP
1.71V TO 5.25V
1µF
100nF
VDRIVE
ALDO
V1+
1MΩ
CLAMP
V1–
1MΩ PGA
CLAMP
LPF
SAR
V8+
V8–
OPTIONAL
RC FILTER
REFCAPA
10µF +
OPTIONAL EXTERNAL
AVCC
REFERENCE
VIN VOUT +2.5V
1µF
0.1µF ADR4525
GND
REFCAPB
REFIN/REFOUT
+ 100nF
REFSELECT
REFGND
1MΩ
CLAMP
1MΩ PGA
CLAMP
LPF
INTERNAL
REFERENCE
2.5V
REF
SAR
CLK OSC
DLDO
CONTROL
INPUTS
PROGRAMMABLE
DIGITAL FILTER
ADC, PGA, AND
CHANNEL
CONFIGURATION
GAIN, OFFSET
AND PHASE
CALIBRATION
DIAGNOSTICS
AND SENSOR
DISCONNECT
SERIAL
PARALLEL/
SERIAL
INTERFACE
PARALLEL
AD7606C-18
CONVST
RESET
RANGE
OS0 TO OS2
BUSY
FRSTDATA
DOUTA TO DOUTH
SDI
SCLK
CS
DB0 TO DB17
RD
WR
PAR/SER SEL
AGND
Figure 1.
Rev. A
Document Feedback
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice.
No license is granted by implication or otherwise under any patent or patent rights of Analog
Devices. Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2021 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

AD7606C-18 Datasheet

Simultaneous Sampling ADC

No Preview Available !

AD7606C-18
TABLE OF CONTENTS
Features .............................................................................................. 1
Calibration and Diagnostics ........................................................... 1
Applications ...................................................................................... 1
Companion Products....................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
General Description ......................................................................... 3
Specifications .................................................................................... 4
Timing Specifications .................................................................. 7
Absolute Maximum Ratings ......................................................... 11
Thermal Resistance .................................................................... 11
Electrostatic Discharge (ESD) Ratings .................................... 11
ESD Caution................................................................................ 11
Pin Configuration and Function Descriptions .......................... 12
Typical Performance Characteristics........................................... 16
Terminology.................................................................................... 27
Theory of Operation ...................................................................... 29
Analog Front-End ...................................................................... 29
SAR ADC..................................................................................... 30
Reference ..................................................................................... 32
Operation Modes........................................................................ 32
Digital Filter .................................................................................... 35
REVISION HISTORY
4/2021—Rev. 0 to Rev. A
Changes to Features Section ........................................................... 1
Change to Table 1............................................................................. 3
Changes to Specifications Section and Table 2 ............................ 4
Change to Table 3............................................................................. 7
Changes to Figure 45 and Figure 46 ............................................ 22
Changes to Figure 58, Figure 59, and Figure 62......................... 24
Changes to Figure 78 and Figure 80 ............................................ 30
Changes to Table 18 ....................................................................... 35
Data Sheet
Padding Oversampling.............................................................. 37
External Oversampling Clock .................................................. 37
System Calibration Features ......................................................... 38
System Phase Calibration.......................................................... 38
System Gain Calibration ........................................................... 38
System Offset Calibration ......................................................... 39
Analog Input Open Circuit Detection .................................... 39
Digital Interface .............................................................................. 41
Parallel Interface......................................................................... 42
Serial Interface ............................................................................ 45
Diagnostics ...................................................................................... 50
Reset Detection........................................................................... 50
Digital Error ................................................................................ 50
Diagnostics Multiplexer ............................................................ 53
Typical Connection Diagram ....................................................... 54
Applications Information ............................................................. 56
Layout Guidelines ...................................................................... 56
Register Summary .......................................................................... 58
Register Details ............................................................................... 59
Outline Dimensions ....................................................................... 75
Ordering Guide .......................................................................... 75
Changes to Table 19 ....................................................................... 36
Change to System Gain Calibration Section .............................. 38
Added Figure 94; Renumbered Sequentially.............................. 38
Change to Table 23 ........................................................................ 41
Change to Figure 106..................................................................... 45
Changes to Temperature Sensor Section .................................... 53
10/2020—Revision 0: Initial Version
Rev. A | Page 2 of 75


Part Number AD7606C-18
Description Simultaneous Sampling ADC
Maker Analog Devices
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