A3967
Microstepping Driver with Translator
ELECTRICAL CHARACTERISTICS at T
A
= +25°C, V
BB
= 30 V, V
CC
= 3.0 V to 5.5V (unless otherwise
noted)
Limits
Characteristic
Output Drivers
Load Supply Voltage Range
Output Leakage Current
Output Saturation Voltage
V
BB
I
CEX
V
CE(sat)
Operating
During sleep mode
V
OUT
= V
BB
V
OUT
= 0 V
Source driver, I
OUT
= -750 mA
Source driver, I
OUT
= -400 mA
Sink driver, I
OUT
= 750 mA
Sink driver, I
OUT
= 400 mA
Clamp Diode Forward Voltage
Motor Supply Current
V
F
I
BB
I
F
= 750 mA
I
F
= 400 mA
Outputs enabled
RESET high
Sleep mode
Control Logic
Logic Supply Voltage Range
Logic Input Voltage
Logic Input Current
Maximum STEP Frequency
Blank Time
Fixed Off Time
V
CC
V
IN(1)
V
IN(0)
I
IN(1)
I
IN(0)
f
STEP
t
BLANK
t
off
R
t
= 56 kΩ, C
t
= 680 pF
R
t
= 56 kΩ, C
t
= 680 pF
V
IN
= 0.7V
CC
V
IN
= 0.3V
CC
Operating
3.0
0.7V
CC
–
-20
-20
500*
700
30
5.0
–
–
<1.0
<1.0
–
950
38
5.5
–
0.3V
CC
20
20
–
1200
V
V
V
μA
μA
kHz
ns
4.75
0
–
–
–
–
–
–
–
–
–
–
–
–
–
<1.0
<-1.0
1.9
1.7
0.65
0.21
1.4
1.1
–
–
–
30
30
20
-20
2.1
2.0
1.3
0.5
1.6
1.4
5.0
200
20
V
V
μA
μA
V
V
V
V
V
V
mA
μA
μA
Symbol Test Conditions
Min.
Typ.
Max.
Units
46
μs
continued next page …
Table 1. Microstep Resolution Truth Table
MS1
L
H
L
H
MS2
L
L
H
H
Resolution
Full step (2 phase)
Half step
Quarter step
Eighth step
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
