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Revision 1.4
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AS5140H
Data Sheet - Electrical Characteristics
6.5 Timing Characteristics
TAMB
= -40 to +150篊, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation), unless otherwise noted.
R
programmed
Programmed fuse resistance (log 1)
10礎 max. current @ 100mV
100k
?/DIV>
R
unprogrammed
Unprogrammed fuse resistance (log 0)
2mA max. current @ 100mV
50
100
?/DIV>
t
PROG
Programming time per bit
Time to prog. a singe fuse bit
10
20
祍
t
CHARGE
Refresh time per bit
Time to charge the cap after t
PROG
1
祍
f
LOAD
LOAD frequency
Data can be loaded at n*2祍
500
kHz
f
READ
READ frequency
Read the data from the latch
2.5
MHz
f
WRITE
WRITE frequency
Write the data to the latch
2.5
MHz
Table 13. Synchronous Serial Interface (SSI)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
t
DO active
Data output activated (logic high)
Time between falling edge of CSn and
data output activated
100
ns
t
CLK FE
First data shifted to output register
Time between falling edge of CSn and
first falling edge of CLK
500
ns
T
CLK/2
Start of data output
Rising edge of CLK shifts out one bit at a
time
500
ns
t
DO valid
Data output valid
Time between rising edge of CLK and
data output valid
413
ns
t
DO tristate
Data output tristate
After the last bit DO changes back to
tristate
100
ns
t
CSn
Pulse width of CSn
CSn =high; To initiate read-out of next
angular position
500
ns
f
CLK
Read-out frequency
Clock frequency to read out serial data
>0
1
MHz
Table 14. Pulse Width Modulation Output
Symbol
Parameter
Conditions
Min
Typ
Max
Units
f
PWM
PWM frequency
Signal period = 1025祍 ?% at T
amb
=
25篊
0.927
0.976
1.024
kHz
Signal period =1025祍 ?0% at T
amb
=
-40 to +150篊
0.878
0.976
1.074
PW
MIN
Minimum pulse width
Position 0d; angle 0 degree
0.90
1
1.10
祍
PW
MAX
Maximum pulse width
Position 1023d; angle 359.65 degree
922
1024
1126
祍
Table 15. Incremental Outputs
Symbol
Parameter
Conditions
Min
Typ
Max
Units
t
Incremental
outputs valid
Incremental outputs valid after power-up
Time between first falling edge of CSn
after power-up and valid incremental
outputs
500
ns
t
Dir valid
Directional indication valid
Time between rising or falling edge of
LSB output and valid directional
indication
500
ns
Table 12. Programming Conditions (Continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
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