IRDM983-025MB, IRDM983-035MB

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17

The following Figures show the VSP input mapping, the Hall sensor input circuit, and the ISENSE pin input

filter circuit.

100%

(ADC=511)

0%

(ADC=199)

1.9V

5.0V

VSP

VMOD

6.0V

Figure 12 VSP Range and Thresholds

HALL1,2+

900kohm

900kohm

1.8pF

HALL1,2-

High Gain

OP amp

Hysteresis

comparator

Hyst: 75 mV typ

Gain: 80dB typ

Figure 13 Hall sensor input circuit

Super Clamp

ESD diode

High Side

PWM Off/Low

side all on

or

PWM all off

Dynamic threshold

Hardware

comparator

COM

VSS

VCC

25kW

25kW

25k W

25kW

5V zener

500K

2pF

Figure 14 COM pin current limit comparator and analog filter