Datasheet

TMC6200 DATASHEET (Rev. 1.04 / 2019-AUG-08) 30
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Figure 6.5 Example for Thermal Offset Drift at output (5x amplification) [mV] from 30°C to 120°C
Attention
The current amplifiers show a random offset. It has to be compensated individually for each channel
in order to yield the absolute current. An initial compensation (after power-up) will basically eliminate
most of this offset. Further, the current amplifiers show a random thermal drift. For applications,
which significantly heat up during operation, this thermal effect should be compensated by either of
these methods:
a) floating AC mean value (AC coupling)
b) linearized two-point compensation using stored values and temperature measurement
c) repeated compensation after a certain amount of heat up / time (may be stored and used for b))
Measure power stage temperature near the IC to allow for thermal compensation of offset!