AMIS−30543
http://onsemi.com
8
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 Max Unit
INTERNAL OSCILLATOR
f
osc
Frequency of internal oscillator 3.6 4 4.4 MHz
MOTOR DRIVER
f
PWM
MOTxx
PWM frequency
Frequency depends only on
internal oscillator
20.5 22.8 25.1 kHz
Double PWM frequency 41.0 45.6 50.2 kHz
tb
rise
MOTxx
Turn−on voltage slope, 10% to
90%
EMC[1:0] = 00 200
V/ms
EMC[1:0] = 01 140
V/ms
EMC[1:0] = 10 70
V/ms
EMC[1:0] = 11 35
V/ms
tb
fall
MOTxx
Turn−off voltage slope, 90% to
10%
EMC[1:0] = 00 200
V/ms
EMC[1:0] = 01 140
V/ms
EMC[1:0] = 10 70
V/ms
EMC[1:0] = 11 35
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 Startup time of charge pump
(Note 11)
Spec external components 5 ms
CLR FUNCTION
t
CLR
CLR Hard reset duration time 100
ms
POWER−UP
t
PU
POR/WD
Powerup time V
BB
= 12 V, I
LOAD
= 50 mA,
C
LOAD
= 220 nF
100
ms
t
POR
Reset duration See Figure 16 100 ms
t
RF
Reset filter time See Figure 16 0.5
ms
WATCHDOG
t
WDTO
POR/WD
Watchdog time out interval 32 512 ms
t
WDPR
Prohibited watchdog
acknowledge delay
2 ms
NXT FUNCTION
t
NXT_HI
NXT
NXT Minimum, High Pulse Width See Figure 5 2
ms
t
NXT_HI
NXT Minimum, Low Pulse Width See Figure 5 2
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. Guaranteed by design