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Sampling ADC. AD7606C-18 Datasheet

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Sampling ADC. AD7606C-18 Datasheet






AD7606C-18 ADC. Datasheet pdf. Equivalent




AD7606C-18 ADC. Datasheet pdf. Equivalent





Part

AD7606C-18

Description

Simultaneous Sampling ADC



Feature


Data Sheet 8-Channel DAS with 18-Bit, 1 MSPS Bipolar Input, Simultaneous Sampl ing ADC AD7606C-18 FEATURES CALIBRATI ON AND DIAGNOSTICS 18-bit ADC with 1 M SPS on all channels Input buffer with 1 MΩ minimum analog input impedance (R IN) Single 5 V analog supply and 1.71 V to 5.25 V VDRIVE Per channel selectabl e analog input ranges Bipolar single-en ded: ±12.5 V, ±10 V,.
Manufacture

Analog Devices

Datasheet
Download AD7606C-18 Datasheet


Analog Devices AD7606C-18

AD7606C-18; ±6.25 V, ±5 V, ±2.5 V Unipolar singl e-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 o ptions: 25 kHz and 220 kHz, per channel Flexible digital filter, oversampling ratio up to 256 −40°C to +125°C ope rating range ±21 V input clamp protect ion with 6 kV ESD Pin to pin compatible to the AD7606B, AD7608, and A.


Analog Devices AD7606C-18

D7609 Performance 93 dB typical SNR for ±20 V bipolar differential range 102 d B SNR, oversampling by 32 −100 dB typ ical THD for all other ranges TUE = 0.0 5% of FSR maximum, external reference 0.5 ppm/°C typical PFS and NFS error drift ±3 ppm/°C typical reference tem perature coefficient Per channel syste m phase, offset, and gain calibration A nalog input open circuit .


Analog Devices AD7606C-18

detection feature Self diagnostics and m onitoring features CRC error checking o n read and write data and registers APP LICATIONS Power line monitoring Protect ive relays Multiphase motor control Ins trumentation and control systems Data a cquisition systems COMPANION PRODUCTS V oltage References: ADR4525, LT6657, LTC 6655 Digital Isolators: ADuM142E, ADuM6 422A, ADuM5020, AD.

Part

AD7606C-18

Description

Simultaneous Sampling ADC



Feature


Data Sheet 8-Channel DAS with 18-Bit, 1 MSPS Bipolar Input, Simultaneous Sampl ing ADC AD7606C-18 FEATURES CALIBRATI ON AND DIAGNOSTICS 18-bit ADC with 1 M SPS on all channels Input buffer with 1 MΩ minimum analog input impedance (R IN) Single 5 V analog supply and 1.71 V to 5.25 V VDRIVE Per channel selectabl e analog input ranges Bipolar single-en ded: ±12.5 V, ±10 V,.
Manufacture

Analog Devices

Datasheet
Download AD7606C-18 Datasheet




 AD7606C-18
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
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Tel: 781.329.4700
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Technical Support
www.analog.com




 AD7606C-18
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




 AD7606C-18
Data Sheet
GENERAL DESCRIPTION
The AD7606C-18 is an 18-bit, simultaneous sampling, analog-
to-digital data acquisition system (DAS) with eight channels.
Each channel contains analog input clamp protection, a
programmable gain amplifier (PGA), a low-pass filter (LPF),
and an 18-bit successive approximation register (SAR) analog-
to-digital converter (ADC). The AD7606C-18 also contains a
flexible digital filter, a low drift, 2.5 V precision reference, a
reference buffer to drive the ADC, and flexible parallel and
serial interfaces.
The AD7606C-18 operates from a single 5 V supply and
accommodates the following input ranges when sampling at
throughput rates of 1 MSPS for all channels:
Bipolar single-ended: ±12.5 V, ±10 V, ±6.25 V, ±5 V, and
±2.5 V
Unipolar single-ended: 0 V to 12.5 V, 0 V to 10 V, and 0 V
to 5 V
Bipolar differential: ±20 V, ±12.5 V, ±10 V, and ±5 V
The input clamp protection tolerates voltages up to ±21 V. The
single supply operation, on-chip filtering, and high input
impedance eliminate the need for external driver op amps,
which require bipolar supplies. For applications with lower
AD7606C-18
throughput rates, the AD7606C-18 flexible digital filter can be
used to improve noise performance.
In hardware mode, the AD7606C-18 is fully compatible with
the AD7608 and AD7609. In software mode, the following
advanced features are available:
Analog input range selectable per channel with added
ranges available
High bandwidth mode (220 kHz) selectable per channel
Additional oversampling options with an oversampling ratio
up to 256
System gain, system offset, and system phase calibration,
per channel
Analog input open circuit detector
Diagnostic multiplexer
Monitoring functions (serial peripheral interface (SPI)
invalid read and write, cyclic redundancy check (CRC),
busy stuck monitor, and reset detection)
Note that throughout this data sheet, multifunction pins, such
as the RD/SCLK pin, are referred to either by the entire pin
name or by a single function of the pin, for example, the SCLK pin,
when only that function is relevant.
Table 1. Bipolar Input, Simultaneous Sampling, Pin to Pin Compatible Family of Devices
Input Type
Resolution (Bits) RIN1 = 1 MΩ, 200 kSPS RIN = 5 MΩ, 800 kSPS RIN = 1 MΩ, 1 MSPS
Single-Ended
18
AD7608
AD7606C-182
16
AD7606
AD7606B2
AD7606C-16
AD7606-6
AD7606-4
14
AD7607
True Differential 18
AD7609
AD7606C-182
1 RIN is input impedance.
2 This state-of-the-art device is recommended for newer designs as an alternative to the AD7606, AD7608, and AD7609.
Number of Channels
8
8
6
4
8
8
Rev. A | Page 3 of 75






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