Sigma-Delta Modulator. AD7401 Datasheet

AD7401 Modulator. Datasheet pdf. Equivalent


Part AD7401
Description Isolated Sigma-Delta Modulator
Feature Data Sheet Isolated Sigma-Delta Modulator AD7401 FEATURES 20 MHz maximum external clock rate Secon.
Manufacture Analog Devices
Datasheet
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Data Sheet Isolated Sigma-Delta Modulator AD7401 FEATURES AD7401 Datasheet
Isolated Sigma-Delta Modulator AD7401A FEATURES 20 MHz maxi AD7401A Datasheet
Recommendation Recommendation Datasheet AD7401 Datasheet




AD7401
Data Sheet
Isolated Sigma-Delta Modulator
AD7401
FEATURES
20 MHz maximum external clock rate
Second-order modulator
16 bits no missing codes
±2 LSB INL typical at 16 bits
3.5 μV/°C maximum offset drift
On-board digital isolator
On-board reference
Low power operation: 20 mA maximum at 5.25 V
−40°C to +105°C operating range
16-lead SOIC 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
VIORM = 891 V peak
APPLICATIONS
AC motor controls
Data acquisition systems
A/D + opto-isolator replacements
GENERAL DESCRIPTION
The AD74011 is a second-order, sigma-delta (Σ-Δ) modulator
that converts an analog input signal into a high speed, 1-bit data
stream with on-chip digital isolation based on Analog Devices,
Inc., iCoupler® technology. The AD7401 operates from a 5 V
power supply and accepts a differential input signal of ±200 mV
(±320 mV full scale). The analog input is continuously sampled
by the analog modulator, eliminating the need for external sample-
and-hold circuitry. The input information is contained in the
output stream as a density of ones with a data rate up to 20 MHz.
The original information can be reconstructed with an appropriate
digital filter. The serial input/output can use a 5 V or a 3 V
supply (VDD2).
The serial interface is digitally isolated. High speed CMOS,
combined with monolithic air core transformer technology,
means the on-chip isolation provides outstanding performance
characteristics, superior to alternatives such as optocoupler devices.
The device contains an on-chip reference. The AD7401 is offered
in a 16-lead SOIC and has an operating temperature range of
−40°C to +105°C.
An internal clock version, AD7400, is also available.
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329.
FUNCTIONAL BLOCK DIAGRAM
VDD1
VDD2
VIN+
VIN
T/H
Σ-ADC
BUF
REF
CONTROL LOGIC
UPDATE
ENCODE
WATCHDOG
AD7401
WATCHDOG
DECODE
UPDATE
MDAT
DECODE
ENCODE
MCLKIN
GND1
Figure 1.
GND2
Rev. E
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AD7401
AD7401* Product Page Quick Links
Last Content Update: 11/01/2016
Comparable Parts
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Evaluation Kits
• AD7401 Evaluation Board
Documentation
Application Notes
• AN-0971: Recommendations for Control of Radiated
Emissions with isoPower Devices
• AN-1316: Generating Multiple Isolated Bias Rails for
IGBT Motor Drives with Flyback, SEPIC, and Ćuk
Combination
• AN-727: iCoupler® Isolation in RS-485 Applications
• AN-740: iCoupler® Isolation in RS-232 Applications
• AN-770: iCoupler® Isolation in CAN Bus Applications
• AN-793: ESD/Latch-Up Considerations with iCoupler®
Isolation Products
• AN-825: Power Supply Considerations in iCoupler®
Isolation Products
• AN-913: Isolating I2C Interfaces
Data Sheet
• AD7401: Isolated Sigma-Delta Modulator Data Sheet
Software and Systems Requirements
• CED1Z FPGA Project for AD7401/01A with Nios driver
• AD7401 and AD7401A Evaluation Software
Tools and Simulations
• AD7400/AD7401 IBIS Model
Reference Materials
Press
• Analog Devices Achieves Major Milestone by Shipping 1
Billionth Channel of iCoupler Digital Isolation
Product Selection Guide
• Digital Isolator Product Selection and Resource Guide
Technical Articles
• Eye Movement Controls Gaming Console
• Inside iCoupler® Technology:ADuM347x PWM Controller
and Transformer Driver with Quad-Channel Isolators
Design Summary
• NAppkin Note: Lowering the Power of the ADuM524x
• Sigma-Delta Conversion Used for Motor Control
Design Resources
• AD7401 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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