AMIS-30521 Datasheet, PDF (8/28 Pages) AMI SEMICONDUCTOR – Micro-stepping Motor Driver

AMIS−30521, NCV70521
Table 6. AC PARAMETERS (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
f_d
PWM Frequency
MOTxx Double PWM Frequency
PWM Jitter Depth (Note 12)
Frequency Depends Only on
Internal Oscillator
EMC[1:0] = 00
20.8 22.8
41.6 45.6
7
150
EMC[1:0] = 01
100
Tb_rise
MOTxx Turn−On Voltage Slope, 10% to 90%
EMC[1:0] = 10
50
EMC[1:0] = 11
25
EMC[1:0] = 00
150
EMC[1:0] = 01
100
Tb_fall MOTxx Turn−off Voltage Slope, 90% to 10%
EMC[1:0] = 10
50
EMC[1:0] = 11
25
DIGITAL OUTPUTS
T_H2L
DO
ERR
Output Falltime from V_inH to V_inL
Capacitive Load 400 pF and
Pullup Resistor of 1.5 kW
CHARGE PUMP
f_CP
CPN
CPP
Charge Pump Frequency
250
T_CPU MOTxx Startup Time of Charge Pump (Note 13) Spec External Components
CLR FUNCTION
t_CLR
CLR Hard Reset Duration Time
20
NXT FUNCTION
t_{NXT_HI}
NXT Minimum, High Pulse Width
See Figure 4
2
t_{NXT_LO}
NXT Minimum, Low Pulse Width
See Figure 4
2
t_{DIR_SET}
NXT _{NXT Hold Time, Following Change of}
DIR
See Figure 4
0.5
t_{DIR_HOLD}
NXT Hold Time, Before Change of DIR See Figure 4
0.5
12. Characterization Data Only
13. Guaranteed by design.
t_{NXT_HI}
t_{NXT_LO}
Max Unit
4.4
MHz
24.8
kHz
49.6
kHz
% f_PWM
V/ms
V/ms
V/ms
V/ms
V/ms
V/ms
V/ms
V/ms
50
ns
kHz
5
ms
90
ms
ms
ms
ms
ms
NXT
0.5 VCC
t_{DIR_SET}
t_{DIR_HOLD}
ÌÌÌÌÌÌÌÌÌ _DIR
VALID
ÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌ
Figure 4. NXT−Input Timing Diagram
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