717

Motor driver ICs

BA6811F / BA6813F

(3)Hall amplifier input voltage

The R1 and R2 resistances must be set so as to maintain

the Hall amplifier input bias voltage within the range of 0V

*2.8V) including the signal amplitude.

The Hall device may be affected by power supply noise

due to the PCB conductor pattern. If you have this prob-

lem, insert a capacitor C1 as shown in Fig. 5.

If the conductor lines from the Hall device output termi-

nals to the Hall inputs of the IC are particularly long, noise

can be picked up and fed into the inputs. If you have this

problem, insert a capacitor C2 as shown in Fig. 5. Note

that the Hall inputs have no hysteresis in this IC.

Hall current is given by :

where RH is the Hall device impedance.

FExternal dimensions (Units: mm)

R1

)R2)RH