DA6012.000
30 June 2008
APPLICATION INFORMATION
VCC
VCC
22µF
µ
100nF
100nF
+
GND
VDD
VDD
FSCXA
CWA
VDD
GND
Output
Driver A
OUTA1
OUTA2
OUTA3
OUTA4
Output
Driver B
Stepper
Motor
Glitch
Filter
Glitch
Filter
FSCXB
CWB
Glitch
Filter
Glitch
Filter
Output
Driver C
µ
C
FSCXC
CWC
OUTB1
OUTB2
OUTB3
OUTB4
Stepper
Motor
Glitch
Filter
Glitch
Filter
Output
Driver D
OUTC1
OUTC2
OUTC3
OUTC4
Stepper
Motor
FSCXD
CWD
Glitch
Filter
Glitch
Filter
Glitch
Filter
OUTD1
OUTD2
OUTD3
OUTD4
Stepper
Motor
XRESET
VSS
10
kΩ
MAS6012AA4
VSS
GND
GND
GND
Figure 3.
Typical MAS6012AA4 quad stepper motor driver application circuit
For filtering fast voltage transients it is
recommended to connect two 100nF ceramic
capacitors close to power supply pins of the IC (see
figure 3). Additionally there should be 5µF
capacitance per motor connected for latch-up
protection. Thus for four motors there should be
additional 22µF filtering capacitor connected to the
supplies.
For proper power up it is recommended to keep the
XRESET pin low during supplies rising. Depending
on used microcontroller an external pull-down
resistor might be needed to stay at reset during
power up (see figure 3 external pull down resistor
connected to XRESET pin).
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MAS [ MICRO ANALOG SYSTEMS ]
