### Q

I want to use the ADUM1250/51 in a battery application. Are there sometips to decrease the power in this type of application?

### A

The ADuM1250 consumes a certain amount of power when idle, and that can only beeffected by removing power from the Vdd pins. Power can be lowered by choices

in how the bus is operated. The bulk of the power is consumed by driving the

bus capacitance. The higher the capacitance, and the higher the speed

required, the lower the required values for the pull-up resistors and the

higher the static and dynamic current consumed.

To minimize power:

1) Make the I2C bus as short as possible with the minimum number of nodes to

lower the capacitance.

2) Run the bus as slowly as possible.

3) Make the pull-up resistors as large as possible, this will depend on what is

achieved in 1 and 2.