ADUM1201 Digital Isolator Module for USB/CAN

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ADUM120X is a dual-channel digital isolator based on iCoupler magnetic coupling isolation technology. It adopts high-speed CMOS technology and chip-level transformer technology. It has advantages that photoelectric isolation devices cannot match in terms of performance, power consumption, volume, etc. Based on ADI's patented iCoupler digital isolator, it uses patented planar magnetic field isolation technology. iCoupler technology is a patented isolation technology based on chip-sized transformers rather than the combination of LEDs and photodiodes used in optocouplers. iCoupler technology eliminates the photoelectric conversion process in the optocoupler and uses the iCoupler transformer patented technology to integrate the transformer driving and receiving circuits, thereby achieving performance advantages that photoelectric isolators cannot match. Because the iCouple transformer is manufactured directly on the chip using a wafer-level manufacturing process, iCoupler channels can integrate between channels more efficiently than optocouplers and can implement other semiconductor functions more easily. Since there is no photoelectric conversion link in the optocoupler that affects efficiency, the iCoupler digital isolator does not require an external circuit to drive the LED, and its power consumption is only 1/10 to 1/50 of that of the optocoupler. This new electromagnetic-based isolation method is far superior to optical couplers in terms of resistance to high temperature effects. The performance and reliability of iCoupler digital isolators do not decrease in a high temperature environment of 125°C, so low-cost, small-volume devices can be used SOIC packaging not only reduces the cost but also reduces the size of the chip. In addition, the isolation channel of iCoupler digital isolator has higher data transmission rate, timing accuracy and transient common mode rejection than optocoupler. Its rated isolation voltage is twice that of high-isolation optocouplers, and its data transfer rate and timing accuracy are 10 times higher. In addition, unlike optocouplers, 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 hardware connection lines between chips. Electronic FlecFan The two ends isolated by ADUM1201 have their own power supply and reference ground. The power supply voltage range is between 2.7V and 5.5V. This can achieve low-voltage power supply, thereby further reducing system power consumption. A 0.01µF to 0.1µF capacitor needs to be connected between the power supply and the reference ground to filter out high-frequency interference. The distance between the capacitor and the power supply should be within 20mm, which can achieve better filtering effect. Because the two isolation channels are highly matched, the crosstalk between channels is very small, and the two-channel input and output reverse design is used, which is very suitable for the bidirectional transceiver characteristics of the RS232 bus and greatly simplifies the hardware connection between the isolator and the isolated ends. It should be noted that GND1 and GND2 are two different reference grounds, otherwise the isolation effect will not be achieved. In addition, it should be noted that when ADUM1201 is working normally, the power supply at both ends requires Both channels of ADUM1201 must be powered on at the same time to ensure normal operation. If there is one If the chip is not powered on, the entire chip will not work properly.

Specification of ADUM1201 digital isolator module for USB/CAN:

Because it is based on iCoupler technology, the ADUM1201 has many advantages over opto-isolators:

  • The higher speed can reach 125Mbps.
  • Lower power consumption: The power consumption is lower than 1/10 of the traditional photoelectric isolator at the same data transmission rate, and the minimum operating current is 0.8mA.
  • The performance has higher timing accuracy, transient common mode suppression, and channel-to- channel matching than traditional photoelectric isolators.
  • Smaller in size and higher in integration, the printed circuit board (PCB) area is 40% of that of traditional photoelectric isolators.
  • More Flexible Applications Unlike traditional optocouplers, multi-channel iCoupler digital isolators can provide forward and reverse communication channels within the same chip.
  • working voltage: 3~5V DC
  • Isolation voltage: 2500V
  • Working temperature: up to 125℃
  • Product size: short style: 15.3*10.5mm / Long style: 21*10.2mm
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