DRV8824_14 Datasheet, PDF (7/36 Pages) Texas Instruments – DRV8824 Stepper Motor Controller IC

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DRV8824
SLVSA06I – OCTOBER 2009 – REVISED JUNE 2014
Electrical Characteristics (continued)
over operating free-air temperature range of –40°C to 85°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
xVREF = 3.3 V , 5% current setting
ΔI_TRIP
Current trip accuracy
(relative to programmed value)
xVREF = 3.3 V , 10% to 34% current setting
xVREF = 3.3 V, 38% to 67% current setting
xVREF = 3.3 V, 71% to 100% current setting
A_ISENSE Current sense amplifier gain
Reference only
MIN
–25%
–15%
–10%
–5%
TYP MAX UNIT
25%
15%
10%
5%
5
V/V
7.6 Timing Requirements
1 ƒ_STEP
2
t_WH(STEP)
3
t_WL(STEP)
4
t_SU(STEP)
5
t_H(STEP)
6 t_ENBL
7 t_WAKE
Step frequency
Pulse duration, STEP high
Pulse duration, STEP low
Setup time, command before STEP rising
Hold time, command after STEP rising
Enable time, nENBL active to STEP
Wakeup time, nSLEEP inactive high to STEP input accepted
MIN MAX UNIT
250 kHz
1.9
μs
1.9
μs
200
ns
200
ns
200
ns
1 ms
Figure 1. Timing Diagram
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