MCU1201 ADUM-1201 ADUM1201ARZ magnetic separator instead of photoelectric coupler

ADUM1201 two-channel digital magnetic separator instead of photoelectric coupler

Based on the ADI patent i.C oupler digital isolator using planar magnetic isolation technology patent.I.C oupler technology is a patent isolation technique, it is based on the chip size transformer, rather than based on photoelectric coupler used by the combination of LED and photodiode.I.C oupler technology due to cancel the photoelectric conversion process of photoelectric coupler, and adopted the i.C oupler patent technology integrated transformer drive and receiving circuit, so as to realize the performance of optoelectronic isolator is unmatched advantages.Due to the use of chip manufacturing technology level directly on a chip manufacturing i.C ouple transformer, so the i.C oupler channel than the photoelectric coupler effectively to realize the integration of the channel between and relatively easy to achieve other semiconductor features.

Because there is no influence of photoelectric conversion efficiency in photoelectric coupler link, so the i.C oupler digital isolator does not need to drive LED the external circuit, the power consumption is only 1/10 to 1/50 of photoelectric coupler.The new isolation method based on the electromagnetic, far superior in terms of resistance to high temperature influence of optical coupler, i.C oupler digital isolator under the environment of 125 ° high temperature performance and reliability is not decline, thus can be used in a low cost, small volume of SOIC encapsulation, such not only reduced the cost but also reduce the volume of the chip.In addition, i.C oupler digital isolator isolating channel with higher data transfer rate than the photoelectric coupler, timing accuracy and the transient common-mode rejection capability.Its high isolation voltage rating is 2 times of photoelectric coupler isolation degree, and the data transmission rate and timing accuracy is 10 times as much.In addition, unlike the photoelectric coupler, multi-channel i.C oupler digital isolator can within the same chip with forward and reverse communication channel, so that you can make the signal transmission direction more flexible, simplified the hardware connection between the chip.

Because based on i.C oupler technology, so ADUM1201 has many superior to optoelectronic isolator advantages:

• Highest speed higher rate can reach 125 MBPS.
• Power consumption lower power consumption less than 1/10 of the data transfer rate with the traditional photoelectricity isolator, the minimum working current 0.8 mA.
• Performance higher timing accuracy and the transient common-mode rejection, matching degree between channels were superior to the traditional optical isolator.
• A smaller more integrated, printed circuit board (PCB) area of 40% of the traditional optical isolator.
• Application is more flexible and the traditional photoelectric coupler, multi-channel i.C oupler digital isolator can within the same chip with forward and reverse channel of communication.

ADUM1201 ends have their own power supply and isolation by reference to the power supply voltage range from 2.7 V to 5.5 V, so that we can achieve low voltage power supply, so as to further reduce the power consumption of the system.Need access between power supply and the reference to 0.01 u F to 0.1 u F capacitance, to filter out high frequency interference, the distance between the capacitance and power supply should be within the 20 mm, so that we can achieve better filtering effect.Due to two separate channels height matching, crosstalk between channels is very small, and the two channels of input and output reverse design, very suitable for the characteristics of bidirectional RS232 bus transceiver can greatly simplify the isolator and the isolation hardware connection at both ends.It is important to note GND1 and GND2 is two different reference, otherwise will reach the effect of isolation.

In addition it is important to note ADUM1201 normal work, on both ends of the power supply source at the same time electricity is needed to guarantee the normal work of the ADUM1201 two channel can, if there is a no electricity can cause the entire chip can not work normally.