Hello,

I have a question about the DRIVER of ADM2582E.

How many ohms can the DRIVER of ADM2582E drive the load?

Additionally, I have a question about Visoout of ADM2582E.

The ADM2582E tepically has no current available externally on Visoout.

However, I want to learn the maximum value of Iout about Visoout.

Could you teach me the maximum value of the Iout?

Best Regards,

Mr.K

The ADM2582E can drive a maximum 54 ohm load. This is equivalent to a bus with two 120 ohm termination resistors and 32x RS-485 nodes, each with receiver input impedance of 12k Ohms (1 RS-485 unit load).

If the RS-485 nodes have a higher impedance, for example 96 k ohm, then the ADM2582E can drive up to 256 bus nodes, and two termination resistors, which again equals a lumped impedance value of 54 ohms.

The ADM2582E data sheet Figure 21 gives an indication of the maximum current on Visoout.

Yes, as you noted, the ADM2582E typically has no current available externally on VISOOUT. See page 17 of the data sheet.

Best regards,

Richard