AMIS-30511 Datasheet, PDF (6/28 Pages) ON Semiconductor – Micro-Stepping Motor Driver

AMIS−30511
Table 5. AC Parameters (The AC parameters are given for V_BB and temperature in their operating ranges.)
Symbol Pin(s)
Parameter
Remark/Test Conditions
Min. Typ.
Internal Oscillator
f_osc
MOTORDRIVER
Frequency of internal oscillator
3.6
4
f_PWM
MOTxx PWM frequency
Double PWM frequency
Frequency depends only on 20.8 22.8
internal oscillator
41.6 45.6
f_j
PWM Jitter frequency
f_d
PWM Jitter depth
Tb_rise MOTxx turn−on voltage slope, 10% to 90%
EMC[1:0] = 00
150
I_MD = 800 mA
EMC[1:0] = 01
100
EMC[1:0] = 10
50
EMC[1:0] = 11
25
Tb_fall MOTxx turn−off voltage slope, 90% to 10%
EMC[1:0] = 00
150
I_MD = 800 mA
EMC[1:0] = 01
100
EMC[1:0] = 10
50
EMC[1:0] = 11
25
DIGITAL OUTPUTS
T_H2L
DO Output fall−time from V_inH to V_inL
ERRB
Capacitive load 400 pF and
pull−up resistor of 1.5 kW
CHARGE PUMP
f_CP
CPN Charge pump frequency
250
CPP
T_CPU MOTxx Start−up time of charge pump
CLR FUNCTION
Spec external components
T_CLR
CLR
NXT FUNCTION
Hard reset duration time
20
−
t_{NXT_HI}
NXT minimum, high pulse width
See Figure 2
2
t_{NXT_LO}
NXT minimum, low pulse width
See Figure 2
2
NXT
t_{DIR_SET}
NXT hold time, following change of DIR
See Figure 2
0.5
t_{DIR_HOLD}
NXT hold time, before change of DIR
See Figure 2
0.5
Max.
Unit
4.4
MHz
24.8
kHz
49.6
kHz
Hz
% f_PWM
V/ms
V/ms
V/ms
V/ms
V/ms
V/ms
V/ms
V/ms
50
ns
kHz
90
ms
ms
ms
ms
ms
t_{NXT_HI}
t_{NXT_LO}
NXT
0,5 V_CC
t_{DIR_SET} t_{DIR_HOLD}
DIR ^{ÏÏÏÏÏÏ VALID ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ}
Figure 2. NXT−input Timing Diagram
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