6.3

Unidirectionnal / bidirectionnal operation

•

Unidirectional operation

Unidirectional mode of operation allows the device to measure the current through a shunt resistor in one

direction only. The output reference can be Ground or Vcc and can be set by using Vref pins for adjustment.

•

Ground referenced

Figure 31. Output reference to ground

OUT

VREF

V

Shunt

resistor

In-

In+

R1

R2

R3

Gnd

R4

-

+

CC

Current

In this configuration the Vref pin is connected to the ground. The output common mode voltage is then

automatically set to GND when no current flows through the Rshunt resistance. This configuration allows the full-

scale output in unidirectional mode. It allows to measure a current as described in Figure 31.

•

Vcc referenced

Figure 32. Output reference to Vcc

OUT

VREF

V

Shunt

resistor

In-

In+

R1

R2

R3

Gnd

R4

-

+

CC

Current

TSC210, TSC211, TSC212, TSC213, TSC214, TSC215

Application information

DS13237 - Rev 7

page 14/38