DA9012.001

25 August 2004

6 (12)

APPLICATION INFORMATION

Glitch

Filter

Output

Driver A

Glitch

Filter

FSCXA

CWA

Glitch

Filter

Output

Driver B

Glitch

Filter

FSCXB

CWB

Glitch

Filter

Output

Driver C

Glitch

Filter

FSCXC

CWC

Glitch

Filter

Output

Driver D

Glitch

Filter

FSCXD

CWD

VSS

VDD

XRESET

GND

GND

VCC

OUTA1

OUTA2

OUTA3

OUTA4

OUTB1

OUTB2

OUTB3

OUTB4

OUTC1

OUTC2

OUTC3

OUTC4

OUTD1

OUTD2

OUTD3

OUTD4

VDD

VCC

VSS

GND

µ C

Glitch

Filter

100nF

22µF

+

GND

Stepper

Motor

Stepper

Motor

Stepper

Motor

Stepper

Motor

MAS9012A4

10

k

Ω

Figure 3. Typical MAS9012A4 quad stepper motor driver application circuit

The supply voltages of MAS9012 can be decoupled

with parallel connection of 22

µF and 100 nF

decoupling capacitors (see figure 3).