Datasheet

TMC-UPS-2A24V-A-EVAL Evaluation Board • Hardware Version V1.00 | Document Revision V1.00 • 2019-APR-15

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4 Supply Voltage for Shunt Ampliﬁers

With resistors R33 and R34 the supply voltage for the shunt ampliﬁers can be changed. The default setting

is R34 = 5V, which results in a zero current oﬀset of 5.0V/2 = 2.5V as required by TMC4671-EVAL. When

using the TMC4670-EVAL or TMC8670-EVAL, R33 should be placed (0R) and R34 should not be equipped to

change the zero current oﬀset to 3.3V/2 = 1.66V.

Equipping both resistors will short supply voltages and probably damage the module. When using the

TMC4670-EVAL or TMC8670-EVAL and selected supply voltage is 5V the ADC oﬀset will not be at medium

level and not the complete current range can be measured.

Figure 2: Power supply select for shunt ampliﬁers

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