Modification of circuit without changing design.

[Kick]

Hiii all,

I am in trouble. Actually our PCB has fabricated and one of the component in PCB consuming more current (it will lead to early death of 3V battery,we are expecting at least 3yr.). At last we found the component is resistor R8 (see the circuit). So I need to get rid of this resistor,but we can't fabricate board again. I have 2 solutions in my mind,

1. Replace that resistor from PCB and short pads of R8.
2. Use 0 ohm resistor (not sure about this).

Can anyone suggest which one is the best way? or is there any other idea?

 

[mtwieg]

The current through R8 is being consumed by the accelerometer VDDIO pin, the presence and value of R8 is not causing increased current consumption. If you're seeing large current through R8, it's because either the accelerometer is faulty or one of its outputs is driving a heavy load.

How much current are you seeing, and how much do you expect?

 

[Kick]

Now it's consuming almost 50uA. It should be 1uA-3uA and in standby it is 10nA.

 

[KlausST]

Hi,

What are the signal levels on all four SPI lines?

CS should be very close to VCC.
All others either VCC or GND.

Klaus