Figure 40. Recommended layout

5.10

EMI rejection ratio (EMIRR)

The electromagnetic interference (EMI) rejection ratio, or EMIRR, describes the EMI immunity of the current

sensing device. An adverse effect that is common to many current sensing devices is a change in the offset

voltage as a result of RF signal rectification.

A first order, an internal low pass filter, is included on the input of the TSC20x to minimize susceptibility to EMIRR.

Figure 41 shows the EMIRR on pin IN+, Figure 42 shows the EMIRR on pin IN- of the TSC200 measured from 10

MHz up to 2.4 GHz.

Figure 41. EMIRR on pin+

200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400

0

20

40

60

80

100

120

Vcc=5V

Vicm=12V

T=25°C

Prf=-10dBm

Frequency (MHz)

Figure 42. EMIRR on pin-

200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400

0

20

40

60

80

100

120

Vcc=5V

Vicm=12V

T=25°C

Prf=-10dBm

Frequency (MHz)

5.11

Overload recovery

Overload recovery is defined as the time required for the current sensing output to recover from a saturated state

to a linear state.

The saturated state occurs when the output voltage gets very close to either rail in the application. It normally

results from an excessive input voltage.

TSC200, TSC201, TSC202

EMI rejection ratio (EMIRR)

DS13882 - Rev 2

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