Magnetic Isolator Board Module Replace Optocouplers ADUM1201 Isolator ADUM1201ARZ SOIC 8 Isolator SPI Interface

ADI's patented iCoupler-based digital isolators use patented planar magnetic isolation technology. iCoupler technology is a patented isolation technology based on a chip-size transformer rather than the combination of LEDs and photodiodes used in optocouplers. iCoupler technology achieves performance advantages that are unmatched in optoisolators due to the elimination of the photovoltaic conversion process in the optocoupler and the use of patented iCoupler transformer technology to integrate the transformer driver and receiver circuits. The patented iCoupler transformer technology integrates the transformer driver and receiver circuits to achieve performance benefits unmatched by optoisolators. Because the iCouple transformer is fabricated directly on the chip using a wafer-level manufacturing process, the iCoupler channel allows for efficient integration between channels and easier implementation of other semiconductor functions than an optocoupler.

Because there is no photocoupler in the photoconversion affect the efficiency of the photocoupler link, so the iCoupler digital isolator does not need to drive the LED's external circuitry, the power consumption of the photocoupler is only 1/10 to 1/50. This new electromagnetic-based isolation method in the resistance to the effects of high temperatures is far superior to the photocoupler, the iCoupler digital isolator in the high-temperature environment at 125 ° C performance and Reliability of the iCoupler digital isolator at 125 ℃ high-temperature environment does not deteriorate, so it can be used in a low-cost, small volume SOIC package, which not only reduces the cost but also reduces the size of the chip. In addition, the isolated channel of iCoupler digital isolator has higher data rate, timing accuracy and transient common-mode rejection than opto-coupler. The rated isolation voltage is twice that of a high-isolation optocoupler, and the data rate and timing accuracy are 10 times higher. In addition, unlike opto-couplers, multi-channel iCoupler digital isolators can provide forward and reverse communication channels within the same chip, which makes the signal transmission direction more flexible and simplifies the inter-chip hardware connection lines.

Because it is based on iCoupler technology, ADUM1201 has many advantages over optoisolators:

Higher speed can reach 125Mbps.

Lower power consumption is less than 1/10 of the traditional opto-isolator at the same data transfer rate, with a small operating current of 0.8mA.

Higher performance timing accuracy, transient common-mode rejection, the degree of matching between the channels are better than the traditional opto-isolator.

Smaller volume higher integration, printed circuit board (PCB) area of 40% of the traditional optoisolator.

More Flexible Applications Unlike traditional optocouplers, multi-channel iCoupler digital isolators provide forward and reverse communication channels on the same chip.

The two ends isolated by the ADUM1201 have their own power supply and reference ground, the power supply voltage range of 2.7V to 5.5V, which can achieve low voltage power supply, thus further reducing the system power consumption. A 0.01μF to 0.1μF capacitor needs to be accessed between the power supply and reference ground to filter out high-frequency interferences, and the distance between the capacitor and the power supply should be within 20mm for better filtering. As the two isolated channels are highly matched, the crosstalk between the channels is very small, and the use of two-channel input and output reverse design, very suitable for RS232 bus bidirectional transceiver characteristics, greatly simplifying the isolator can be isolated from the two ends of the hardware connection. It should be noted that GND1 and GND2 are two different reference ground, otherwise the isolation effect will not be achieved.