21

2548ES–AVR–07/06

ATmega406

Figure 8-3.

CM Offset with unbalanced cells.

Problem Fix/Workaround

Avoid getting unbalanced cells by using the internal cell balancing FETs.

3.

Voltage Reference Spike

The Voltage Reference, VREF, will spike each time a temperature measurement is started

with the Voltage-ADC.

Problem Fix/Workaround

An accurate temperature measurement could be obtained by doing 10 temperature conver-

sions immediately after each other. The first 9 results would be inaccurate, but the 10th

conversion will be correct.

ature conversions in a row (external decoupling capacitor of 1

μF).