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MAX3232: Current consumption With One Driver Load

Karthik B
Expert 1310 points
Part Number: MAX3232

Hi Team,

Currently I am using MAX3232EIPWR Rs232 Ic in my system, since my system is battery operated  I am very much conserned about the current consumption of this IC.

In datasheet Page 6 , Figure 1 the graph specifies the current when  both the drives are loaded around 12mA , I want to know what will be the current when only 1 driver is loaded? CAn I consider half of 12ma please suggest?

And what will be the standby current if no data transferring is happening?

very short length cable is used (not more than 50cm)

Please suggest.

Regards,

Karthik

  • 0
    TI__Guru 53555 points

    Hi Karthik,

    Current consumption for this device depends mostly on load impedance and the data rate being used. 

    For a setup with 3.3V supply, 3.3k-Ohm resistive load, 0pF capcitive load (very short cable), using only one driver, I've measured the current draw at 9.2mA. 

    This is greater than 6mA (half of 12mA) because the device has some baseline current draw when no driver is loaded. 

    Ignoring the low capacitance of the cable, the device shouldn't change power requirements when not transmitting. 

    Here's a similar thread for your reference:

     

    Let me know if this helps.

    Regards,

    Eric