For high-performance industrial applications. I'd also be interested in the isolated ADC part driving a decent length cable so the DAC part can sit at some distance to it - this would allow you to digitize at source rather than degrade the analogue signal by having this transmitted to the "converter". Explore new digital isolators to transmit high-speed bit streams up to 100 Mbps over the isolation barrier. The CMTI (Common Mode Transient Immunity) column provides additional, albeit indirect, insight into your question: see data in Timing Performance, CMTI, and Power per Channel columns of the products listed. At least start off with a methodology that stands a chance of working and is easily modified to suit different ADCs and DACs. Digital Isolator Families and Isolated Functions (page 9) of Application Note Digital Isolator Design Guide. Figure 3: Comparison of available package options. A capacitive isolators inability to pass DC signals makes it inherently the right. ISOS141-SEP: Radiation-tolerant digital isolator Figure 2: TI digital isolator package type selection flowchart. ISO73xx: Low-power, low-jitter digital isolators. I think that trying to do it without a micro controlling to the DAC could hit problems. ISO70xx: Ultra-low power digital isolators. This could be transmitted thru a simple magnetic coupler (as per a lot of the ADI isolation devices) and you could decode the serial stream using the "gap" like the stop bits in an async serial stream with a small cheap microprocessor. If I needed an analogue signal isolator like this I'd choose a serial output ADC that could run continuously, possibly from a local clock generator that also generated a conversion pulse. Conversion throughput of around 100ksps would be sufficient.The company manufactures high-performance spintronic products including sensors and couplers that are used to acquire and. Resolution should be between 10 and 16 bit, no specific value is required is a leader in the practical commercialization of spintronics, a nanotechnology that relies on electron spin rather than electron charge to acquire, store and transmit information.The ADC will be powered on the 'dirty' side so there is complete isolation, only the data/conversion control signals need to pass through the isolation barrier.Not tied to I2C, SPI would be appropriate too.Would sending the clock over the digital isolator be a bad idea? If the digital isolator was many times faster than the clock would it have a negligible effect in terms of delay? I'm assuming I can send the data line (SDA) through the digital isolator but to synchronise the ADC and DAC they would need a common clock signal. Keeping both sides isolated is pretty vital and I'm wondering how this will effect the ADC and DAC linking. Possible components include TI ISO7420FEDR and Analog Devices ADUM1200ARZ. CERTIFICATION OF DIGITAL ISOLATORS Abstract: This application note summarizes the international safety standards and certifications that apply to digital isolators. There are a few ways to approach this but I am currently pursuing the solution as seen below:ĪDC and DAC are being proposed as Microchip MCP3221 and MCP4725 respectively.Ī digital isolator would give a smaller footprint than an opto-isolator with its accompanying components and would provide much greater performance. The input will be of the 4-20mA range (1-5V). The ADN4624 enables precision timing with ultra-low jitter to deliver full ADC performance and resolution including precision ADC sampling clocks.I'm looking into isolating an analogue input coming from field equipment and interfacing to a PLC analogue input module. The new iCoupler digital isolator provides up to 10Gbps total bandwidth in a single, small footprint device, allows for direct isolation of high-speed serial LVDS or CML at full speed and eliminates the complexity of deserialisation. The ADN4624 offers simplified connectivity, robust isolation and data integrity in harsh environments. Find application notes and technical articles about digital isolation from ADI:. ![]() Attend a webinar on gigabit digital isolation:.Watch a video about the ADN4624 and iCoupler digital isolation titled “Protect Your Innovations: from High Precision to High Power”:.Connect with ADI digital isolation experts on EngineerZone, an engineering community forum:.Download data sheet, order samples and evaluation boards:.The ADN4624 is a compact solution that meets medical standards and reliably isolates high fidelity video and imaging links, precision analogue front ends and serial interconnects as an alternative to cumbersome and specialised fibre solutions. The new digital isolator streamlines design and easily integrates isolation for safety or data integrity. The ADN4624 digital isolator provides four channels at 2.5Gbps, allowing data to transfer seamlessly in the electrical domain and enabling new system architectures in digital health, instrumentation and smart industry. (ADI) has introduced the first in a new series of iCoupler digital isolators that offers a total bandwidth of 10 Gigabits per second.
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