I am building a prototype that uses a RS485 BUS to communicate many devices and current consumption is a crucial part in this project. In order to set the communication up, I have been looking at several manufacturers. However, I haven't been able to find the current consumption while sending or receiving data in the datasheet specifications of any of the products. I also didn't find a graphic showing Icc(mA) vs. Datarate(Mbps) like i found in some other Maxim Integrated products. Do you know where is this information available?
This is an example of the table i was talking about.
In particular, I have identified the following products to be valid for my solution:
- Texas Instruments:
- Maxim Integrated:
Thank you in advance.
Edit: First of all, thanks for your answers and comments.
As some of you have answered, the current consumption could be negligible in most cases due to the short ammount of time the transceiver is transmitting. In my case I have to send images and it takes roughly 2.5 seconds for every image sensor on the bus, which in total takes up about 14.4 % of the total time, thus not beeing negligible.
Most of you have poined out the average powed dissipation section on the datasheets of the transceivers, so I will look into that for the devices I have asked for and post here the results I come up with.