AMIS−30532
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8
Table 6. 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 Max Unit
INTERNAL OSCILLATOR
f
osc
Frequency of internal oscillator 3.6 4.0 4.4 MHz
MOTORDRIVER
f
PWM
MOTxx
PWM frequency
Frequency depends only on
internal oscillator
20.8 22.8 24.8 kHz
Double PWM frequency 41.6 45.6 49.6 kHz
f
d
PWM Jitter depth (Note 11) 10 % f
PWM
Tb
rise
MOTxx
Turn−on voltage slope, 10% to 90%
EMC[1:0] = 00 350
V/ms
EMC[1:0] = 01 250
V/ms
EMC[1:0] = 10 200
V/ms
EMC[1:0] = 11 100
V/ms
Tb
fall
MOTxx
Turn−off voltage slope, 90% to 10%
EMC[1:0] = 00 350
V/ms
EMC[1:0] = 01 250
V/ms
EMC[1:0] = 10 200
V/ms
EMC[1:0] = 11 100
V/ms
DIGITAL OUTPUTS
T
H2L
DO
ERR
Output fall−time from V
inH
to V
inL
Capacitive load 400 pF and
pullup resistor of 1.5 kW
50 ns
CHARGE PUMP
f
CP
CPN CPP Charge pump frequency 250 kHz
T
CPU
MOTxx Start−up time of charge pump
(Note 12)
Spec external components in
Table 8
5 ms
CLR FUNCTION
T
CLR
CLR Hard reset duration time 100
ms
POWERUP
t
PU
POR /
WD
Powerup time V
BB
= 12 V, I
LOAD
= 50 mA,
C
LOAD
= 220 nF
110
ms
t
POR
Reset duration See Figure 16 100 ms
t
RF
Reset filter time See Figure 16 1.0
ms
WATCHDOG
t
WDTO
POR /
WD
Watchdog time out interval 32 512 ms
t
WDPR
Prohibited watchdog acknowledge
delay
2.0 ms
NXT FUNCTION
t
NXT_HI
NXT
NXT Minimum, High Pulse Width See Figure 5 2.0
ms
t
NXT_HI
NXT Minimum, Low Pulse Width See Figure 5 2.0
ms
t
DIR_SET
NXT Hold Time, Following Change of
DIR
See Figure 5 0.5
ms
t
DIR_HOLD
NXT Hold Time, Before Change of DIR See Figure 5 0.5
ms
11. Characterization Data Only
12.Guaranteed by design