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ADUM7703 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADUM7703
Description  16-Bit, Isolated, Sigma-Delta ADC
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADUM7703 Datasheet(HTML) 1 Page - Analog Devices

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16-Bit, Isolated,
Sigma-Delta ADC
Data Sheet
ADuM7703
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
©2019 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
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 (16-lead SOIC_W)
−40°C to +105°C (8-lead SOIC_IC)
20 V operation on VDD1
High CMTI: 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
UL recognition
5700 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice 5A (Pending)
VDE Certificate of Conformity
DIN V VDE V 0884-10: VIORM = 1270 VPEAK
DIN V VDE V 0884-11: VIORM = 1060 VPEAK (Pending)
APPLICATIONS
Shunt current monitoring
AC motor controls
Power and solar inverters
Wind turbine inverters
Analog-to-digital and optoisolator replacement
FUNCTIONAL BLOCK DIAGRAM
VDD1
ADuM7703
VDD2
MCLKIN
MDAT
GND2
GND1
DATA
DECODER
CLK
ENCODER
DATA
ENCODER
Σ-∆ ADC
GAIN
VIN+
VIN–
CLK
DECODER
Figure 1.
GENERAL DESCRIPTION
The ADuM7703 is a high performance, second-order, Σ-Δ analog-
to-digital converter (ADC) with an integrated low dropout
(LDO) regulator 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 20 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
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 3.3 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 ADuM7703 device
is available in a 16-lead, wide-body SOIC with an operating
temperature range of −40°C to +125°C and an 8-lead, wide-body
SOIC with an operating temperature range of −40°C to +105°C.


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