DRV8805_12 Datasheet, PDF (6/19 Pages) Texas Instruments – UNIPOLAR STEPPER MOTOR DRIVER IC

DRV8805
SLVSAW3C – JULY 2011 – REVISED MARCH 2012
TIMING REQUIREMENTS
over operating free-air temperature range (unless otherwise noted)⁽¹⁾
NO.
PARAMETER
DESCRIPTION
1 f_STEP
2
t_WH(STEP)
3
t_WL(STEP)
4
t_SU(STEP)
5
t_H(STEP)
6
t_OE(ENABLE)
7
t_PD(L-H)
8
t_PD(H-L)
-
t_RESET
Step frequency
Pulse duration, STEP high
Pulse duration, STEP low
Setup time, DIR, SMx to STEP rising
Hold time, DIR, SMx to STEP rising
Enable time, nENBL to output low
Propagation delay time, STEP to OUTx, low to high
Propagation delay time, STEP to OUTx, high to low
RESET pulse width
(1) Not production tested.
STEP
1
2
3
nENBL
STEP
DIR, SMx
OUTx
45
6
7
Figure 1. DRV8805 Timing Requirements
www.ti.com
MIN MAX UNIT
250 kHz
1.9
µs
1.9
µs
1
µs
1
µs
50 ns
500 ns
500 ns
20
µs
8
6
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