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Analog Devices Semiconductor Electronic Components Datasheet

ADuM7701 Datasheet

Sigma-Delta Modulator

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Data Sheet
FEATURES
5 MHz to 21 MHz master clock input frequency
Offset drift vs. temperature: ±0.6 μV/°C maximum
SNR: 86 dB typical
16 bits, no missing codes
Full-scale analog input voltage range: ±320 mV
ENOB: 14 bits typical
IDD1: 10 mA maximum
On-board digital isolator
Operating temperature range: −40°C to +125°C
High common-mode transient immunity: 150 kV/μs minimum,
VDD2 = 3.3 V
Wide-body SOICs
16-lead SOIC_W
8-lead SOIC_IC with increased creepage
Safety and regulatory approvals (pending)
UL recognition
5700 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice 5A
VDE Certificate of Conformity
DIN V VDE V 0884-10: VIORM = 1270 VPEAK
DIN V VDE V 0884-11: VIORM = 1060 VPEAK
APPLICATIONS
Shunt current monitoring
AC motor controls
Power and solar inverters
Wind turbine inverters
Analog-to-digital and optoisolator replacement
GENERAL DESCRIPTION
The ADuM7701 is a high performance, second-order, Σ-Δ
modulator that converts an analog input signal into a high
speed, single-bit data stream, with on-chip digital isolation
based on Analog Devices, Inc., iCoupler® technology. The
device operates from a 4.5 V to 5.5 V power supply range
(VDD1) and accepts a pseudo differential input signal of
±250 mV (±320 mV full-scale). The pseudo differential input
is ideally suited to shunt voltage monitoring in high voltage
applications where galvanic isolation is required.
The analog input is continuously sampled by a high performance
analog modulator and converted to a ones density digital output
stream with a data rate of up to 21 MHz. The original information
16-Bit, Isolated,
Sigma-Delta Modulator
ADuM7701
FUNCTIONAL BLOCK DIAGRAM
VDD1
VDD2
ADuM7701
CLK
DECODER
CLK
ENCODER
MCLKIN
VIN+
VIN–
GAIN
Σ-Δ ADC
DATA
ENCODER
DATA
DECODER
MDAT
GND1
Figure 1.
GND2
can be reconstructed with an appropriate sinc3 digital filter to
achieve an 86 dB signal-to-noise ratio (SNR) at 78.1 kSPS with a
256 decimation rate and a 20 MHz master clock. The serial
input and output operates from a 5 V or a 3 V supply (VDD2).
The serial interface is digitally isolated. High speed complementary
metal-oxide semiconductor (CMOS) technology, combined with
monolithic transformer technology, results in the on-chip
isolation providing outstanding performance characteristics,
superior to alternatives such as optocoupler devices. The
ADuM7701 device is available in both a 16-lead and an 8-lead
wide-body SOIC and has an operating temperature range of
−40°C to +125°C.
Rev. 0
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalog Devicesforitsuse,norforanyinfringementsofpatentsorother
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
©2019 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

ADuM7701 Datasheet

Sigma-Delta Modulator

No Preview Available !

ADuM7701
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Timing Specifications .................................................................. 4
Package Characteristics ............................................................... 5
Insulation and Safety Related Specifications ............................ 5
Regulatory Information (Pending) ............................................ 5
DIN V VDE V 0884-10 Insulation Characteristics (Pending) .... 6
DIN V VDE V 0884-11 Insulation Characteristics (Pending)..... 7
Absolute Maximum Ratings............................................................ 8
Thermal Resistance ...................................................................... 8
ESD Caution.................................................................................. 8
Insulation Ratings......................................................................... 8
Pin Configurations and Function Descriptions ........................... 9
REVISION HISTORY
3/2019—Revision 0: Initial Version
Data Sheet
Typical Performance Characteristics ............................................11
Terminology .................................................................................... 14
Theory of Operation ...................................................................... 16
Circuit Information.................................................................... 16
Analog Input ............................................................................... 16
Applications Information .............................................................. 18
Current Sensing Applications ................................................... 18
Voltage Sensing Applications .................................................... 18
Input Filter................................................................................... 18
Digital Filter ................................................................................ 19
Interfacing to ADSP-CM4xx..................................................... 20
Grounding and Layout .............................................................. 20
Insulation Lifetime ..................................................................... 20
Outline Dimensions ....................................................................... 21
Ordering Guide .......................................................................... 22
Rev. 0 | Page 2 of 22


Part Number ADuM7701
Description Sigma-Delta Modulator
Maker Analog Devices
Total Page 22 Pages
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