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AD7405 Datasheet

16-Bit Isolated Sigma-Delta Modulator

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Data Sheet
16-Bit, Isolated Sigma-Delta Modulator,
LVDS Interface
AD7405
FEATURES
5 MHz to 20 MHz external clock input rate
16 bits, no missing codes
Signal-to-noise ratio (SNR): 88 dB typical
Effective number of bits (ENOB): 14.2 bits typical
Typical offset drift vs. temperature: 1.6 µV/°C
Low voltage differential signaling (LVDS) interface
On-board digital isolator
On-board reference
Full-scale analog input voltage range: ±320 mV
−40°C to + 125°C operating temperature range
High common-mode transient immunity: >25 kV/µs
16-lead, wide-body SOIC_IC, with increased creepage
package
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
Maximum working insulation voltage (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
VDD1
VDD2
AD7405
BUF
VIN+
VIN–
REF
Σ-Δ ADC
CLK
DECODER
DATA
ENCODER
CLK
ENCODER
DATA
DECODER
MCLKIN+
(5MHz TO
20MHz)
MCLKIN–
MDAT+
MDAT–
GND1
Figure 1.
GND2
GENERAL DESCRIPTION
The AD74051 is a high performance, second-order, Σ-Δ modulator
that converts an analog input signal into a high speed, single-bit
LVDS data stream, with on-chip digital isolation based on
Analog Devices, Inc., iCoupler® technology. The AD7405 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 up to 20 MHz. The original information
can be reconstructed with an appropriate digital filter to achieve
88 dB SNR at 78.1 kSPS. The LVDS input/output can use a 3 V
to 5.5 V supply (VDD2).
The LVDS interface is digitally isolated. The LVDS interface
technology, combined with monolithic transformer technology,
means the on-chip isolation provides outstanding performance
characteristics, superior to alternatives such as optocoupler
devices. The AD7405 device is offered in a 16-lead, wide-body
SOIC_IC package and has an operating temperature range of
−40°C to +125°C.
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329.
Rev. A
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
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Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

AD7405 Datasheet

16-Bit Isolated Sigma-Delta Modulator

No Preview Available !

AD7405* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
View a parametric search of comparable parts.
EVALUATION KITS
AD-FMCMOTCON2-EBZ Evaluation Board
AD7405 Evaluation Board
DOCUMENTATION
Application Notes
AN-1377: Gain and Offset Temperature Drift
Compensation for the AD7403/AD7405
Data Sheet
AD7405: 16-Bit, Isolated Sigma-Delta Modulator, LVDS
Interface Data Sheet
User Guides
UG-690: Evaluating the AD7405 16-Bit Isolated Sigma-
Delta ADC
TOOLS AND SIMULATIONS
AD7405 IBIS Model
REFERENCE MATERIALS
Informational
ADSP-CM40x in Solar PV Inverters
Technical Articles
MS-2652: Measurement Techniques for Industrial Motion
Control
Sigma-Delta Conversion Used for Motor Control
DESIGN RESOURCES
AD7405 Material Declaration
PCN-PDN Information
Quality And Reliability
Symbols and Footprints
DISCUSSIONS
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SAMPLE AND BUY
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TECHNICAL SUPPORT
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number.
DOCUMENT FEEDBACK
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Part Number AD7405
Description 16-Bit Isolated Sigma-Delta Modulator
Maker Analog Devices
Total Page 21 Pages
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