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AD7400A: Isolated Sigma-Delta Modulator Data Sheet (Rev. E)3/5/2008PDF393 K
Overview
Features and Benefits
- 10 MHz clock rate
- Second-order modulator
- 16 bits no missing codes
- ±2 LSB INL typical at 16 bits
- 1.5 μV/°C typical offset drift
- On-board digital isolator
- 8-lead surface-mount PDIP package with gull wing leads and 16-lead SOIC package
- See Data Sheet for Additional Information
Product Details
The AD7400A is a second-order, 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 AD7400A operates from a 5 V power supply and accepts a differential input signal of ±250 mV (±320 mV full scale). The analog input is sampled continuously 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 of 10 MHz. The original information can be reconstructed with an appropriate digital filter. The serial I/O 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 part contains an on-chip reference and has an operating temperature range of −40°C to +125°C. The AD7400A is offered in an 8-lead surface-mount PDIP with gull wing leads and a 16-lead SOIC package.
APPLICATIONS
- AC motor controls
- Shunt current monitoring
- Data acquisition systems
- Analog-to-digital and 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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FAQs7/26/2017
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Digital Isolation and Interface Technology Selection Guide2/7/2020PDF4 M
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Measurement Techniques for Industrial Motion Control6/1/2014
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Electromagnetic Flow Meters Achieve High Accuracy in Industrial Applications2/1/2014 Analog Dialogue
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Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with Quad-Channel Isolators Design Summary12/10/2010PDF291 kB
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NAppkin Note: Lowering the Power of the ADuM524x12/10/2010PDF223 kB
Software & Systems Requirements
Device Drivers
Tools & Simulations
IBIS Models
Reference Designs (1)
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.
PCN-PDN Information
Support & Discussions
AD7400A Discussions
Sample & Buy
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Evaluation Boards
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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.