MAX485EEPA

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MAX485EEPA, one of the transceiver chips designed by Maxim Integrated, is widely used in RS-485/RS-422 communication fields. This article will talk about the application field of MAX485EEPA and its working principle.

As a transceiver chip, MAX485EEPA is mainly used in RS-485/RS-422 standard, including automotive, automatic control system and industrial networks. MAX485EEPA is an A/B port logic system, which is mainly applied in low power, long-distance and multi-point communication.

First of all, MAX485EEPA adopts ESD (ElectroStatic Discharge) which is designed for automotive level so far, the ESD may protect the RS-485/RS-422 port from any static charge damage. What’s more, this device equipped with a receiver circuit input and a driver circuit, both of which are protected with integrated high total immunity of ±15kV HBM. Additionally, this chip provides up to 256 nodes at up to 1Mbps.

Take a look at the technical characteristics of MAX485EEPA, this IC has an SNR (Signal Noise Ratio) of 15 gradients and a signal amplitude of 155mV, which are suitable for harsh industrial working environment. In addition, MAX485EEPA is featured with high common mode range of ±25V, the maximum transmission distance can reach up to 4000 feet (1220m).

The working principle of MAX485EEPA is relatively simple, it is basically composed of two blocks, the transmitter block and the receiver block. The transmitter block consists of a driver circuit, which will convert the input logic level signal into electrical signal transmitted over standard RS-485/RS-422 link. On the other hand, the receiver block consists of a driver circuit, which will convert the differential electrical signal from the standard RS-485/RS-422 interface into logic level signal, then output it.

To sum up, MAX485EEPA is an excellent transceiver chip designed for RS-485/RS-422 standard. Compared with other similar chips, MAX485EEPA is more reliable, better performance and longer transmission distance. Therefore, it is a wise choice for automotive, automatic control system and industrial networks.

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