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AD7402-8BRIZ-RL7 Datasheet(PDF) 1 Page - Analog Devices

Part # AD7402-8BRIZ-RL7
Description  16-Bit, Isolated Sigma-Delta Modulator
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7402-8BRIZ-RL7 Datasheet(HTML) 1 Page - Analog Devices

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16-Bit, Isolated Sigma-Delta Modulator
Data Sheet
AD7402
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
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
©2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
FEATURES
10 MHz internal clock rate
16 bits, no missing codes
Signal-to-noise ratio (SNR): 87 dB typical
Effective number of bits (ENOB): 13.5 bits typical
Typical offset drift vs. temperature: 1.7 µV/°C
On-board digital isolator
On-board reference
Full-scale analog input range: ±320 mV
−40°C to +105°C operating range
High common-mode transient immunity: >25 kV/µs
8-lead, wide-body SOIC, with increased creepage package
Slew rate limited output for low electromagnetic
interference (EMI)
Safety and regulatory approvals
UL recognition
5000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice 5A
VDE Certificate of Conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 1250 VPEAK
APPLICATIONS
Shunt current monitoring
AC motor controls
Power and solar inverters
Wind turbine inverters
Data acquisition systems
Analog-to-digital and opto-isolator replacements
FUNCTIONAL BLOCK DIAGRAM
Figure 1.
GENERAL DESCRIPTION
The AD74021 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 AD7402 operates from
a 4.5 V to 5.5 V (VDD1) power supply and accepts a differential
input signal of ±250 mV (±320 mV full scale). The 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 10 MHz. The original
information can be reconstructed with an appropriate digital
filter to achieve 87 dB signal to noise ratio (SNR) at 39 kSPS. The
serial input/output can use a 3 V to 5.5 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, means the on-chip isolation
provides outstanding performance characteristics, superior to
alternatives such as optocoupler devices. The AD7402 device is
offered in an 8-lead, wide body SOIC package and has an
operating temperature range of −40°C to +105°C.
1
Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329.
Σ-Δ ADC
VIN+
GND1
VDD1
VDD2
VIN–
AD7402
GND2
CLK
ENCODER
CLK
DECODER
CLK
DECODER
DATA
ENCODER
CLOCK
BUF
REF
MCLKOUT
(10MHz)
MDAT


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