AS5245 AB austriamicrosystems, AS5245 AB Datasheet - Page 15
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AS5245 AB
Manufacturer Part Number
AS5245 AB
Description
BOARD ADAPTER AS5245
Manufacturer
austriamicrosystems
Specifications of AS5245 AB
Sensor Type
Magnetic, Rotary Position
Sensing Range
360°
Interface
Serial
Voltage - Supply
3.3V, 5V
Embedded
No
Utilized Ic / Part
AS5245
Lead Free Status / RoHS Status
Lead free by exemption / RoHS compliant by exemption
Sensitivity
-
AS5245
Data Sheet - D e t a i l e d D e s c r i p t i o n
Figure 10. Daisy Chain Mode Data Transfer
8.3 Pulse Width Modulation (PWM) Output
The AS5245 provides a pulse width modulated output (PWM), whose duty cycle is proportional to the measured angle. For angle position 0 to
4094:
Examples:
Exception:
The PWM frequency is internally trimmed to an accuracy of ±5% (±10% over full temperature range). This tolerance can be cancelled by
measuring the complete duty cycle as shown above.
Figure 11. PWM Output Signal
www.austriamicrosystems.com/AS5245
1. An angle position of 180º will generate a pulse width ton = 2049µs and a pause t
2. An angle position of 359.8º will generate a pulse width ton = 4095µs and a pause t
1. An angle position of 359.9º will generate a pulse width ton = 4097µs and a pause t
CSn
CLK
DO
calculation: 2049 * 4098 / (2049 + 2049) -1 = 2048
culation: 4095 * 4098 / (4095 + 3) -1 = 4094
culation: 4097 * 4098 / (4097 + 1) -1 = 4096
t
DO active
t
CLK FE
1
D11
T
D10
CLK/2
359.91 deg
(Pos 4095)
t
DO valid
(Pos 0)
Angle
0 deg
D9
D8
Angular Position Data
D7
1µs
D6
PW
Position =
MIN
D5
8
D4
------------------------ - 1
(
t
t
on
on
D3
Revision 1.5
⋅
+
PW
4098
1/f
t
D2
PWM
off
MAX
)
D1
–
1
D0 OCF COF LIN
st
Device
OFF
OFF
OFF
of 2049 µs resulting in Position = 2048 after the
4096µs
Status Bits
of 3 µs resulting in Position = 4094 after the cal-
of 1 µs resulting in Position = 4096 after the cal-
4097µs
Mag
INC
DEC
Mag
18
Even
PAR
D
Angular Position Data
1
D11
2
nd
Device
2
D10 D9
3
(EQ 1)
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