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EVAL-AD7400/01EDZ Technical Note10/14/2011
Overview
Features and Benefits
- 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
- See Data Sheet for Addtional Features
Product Details
The AD7401 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.
APPLICATIONS
- AC motor controls
- Data acquisition systems
- A/D + opto-isolator replacements
Product Categories
Markets and Technologies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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AN-0971: Recommendations for Control of Radiated Emissions with isoPower Devices7/3/2020
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AN-913: Isolating I2C Interfaces (Rev. 0)6/20/2007
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AN-727: iCoupler® Isolation in RS-485 Applications (Rev. 0)11/1/2006
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AN-740: iCoupler® Isolation in RS-232 Applications (Rev. A)11/1/2006
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AN-770: iCoupler® Isolation in CAN Bus Applications (Rev. 0)11/1/2006
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AN-793: ESD/Latch-Up Considerations with iCoupler® Isolation Products (Rev. A)11/1/2006
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AN-825: Power Supply Considerations in iCoupler® Isolation Products (Rev. 0)11/1/2006
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FAQs7/26/2017
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How Next-Generation Isolated Sigma-Delta Modulators Improve Your System-Level Current Measurement12/20/2021
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Micro-Transformers Provide Signal and Power Isolation for Hybrid Electric Vehicles3/1/2018
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Sigma Delta Conversion Used for Motor Control8/1/2015
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FPGA-Based Systems Increase Motor-Control Performance3/1/2015 Analog Dialogue
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Measurement Techniques for Industrial Motion Control6/1/2014
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Digital Isolators Offer Performance Advantages in Industrial Motor Drive Applications4/1/2012
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Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with Quad-Channel Isolators Design Summary12/10/2010
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NAppkin Note: Lowering the Power of the ADuM524x12/10/2010
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Eye Movement Controls Gaming Console11/4/2010
Software & Systems Requirements
Evaluation Software
Device Drivers
Tools & Simulations
IBIS Model
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| AD7401YRWZ | Material Declaration | Reliability Data | 16-Lead SOIC Wide | |
| AD7401YRWZ-REEL | Material Declaration | Reliability Data | 16-Lead SOIC Wide | |
| AD7401YRWZ-REEL7 | Material Declaration | Reliability Data | 16-Lead SOIC Wide | |
| Wafer Fabrication Data |
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AD7401 Discussions
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.