AS5145 AB austriamicrosystems, AS5145 AB Datasheet - Page 17

• Manufacturer Part Number: AS5145 AB
• Description: BOARD ADAPTER AS5145
• Manufacturer: austriamicrosystems

Specifications of AS5145 AB

• Sensor Type: Magnetic, Rotary Position
• Sensing Range: 360°
• Interface: Serial
• Voltage - Supply: 5V
• Embedded: No
• Utilized Ic / Part: AS5145
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Sensitivity: -

AS5145
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
8.2 Pulse Width Modulation (PWM) Output
The AS5145 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/AS5145
CSn
CLK
DO
1. An angle position of 180° will generate a pulse width ton = 2049µs and a pause toff of 2049 µs resulting in Position = 2048 after the cal-
2. An angle position of 359.8° will generate a pulse width ton = 4095µs and a pause toff of 3 µs resulting in Position = 4094 after the cal-
1. An angle position of 359.9° will generate a pulse width ton = 4097µs and a pause toff of 1 µs resulting in Position = 4096 after the cal-
t
culation: 2049 * 4098 / (2049 + 2049) -1 = 2048
culation: 4095 * 4098 / (4095 + 3) -1 = 4094
culation: 4097 * 4098 / (4097 + 1) -1 = 4096
DO active
t
CLK FE
t
T
DO valid
CLK/2
1
D11
D10
D9
359.91 deg
(Pos 4095)
(Pos 0)
Angle
D8
0 deg
Angular Position Data
D7
D6
1µs
PW
Position =
MIN
D5
8
D4
------------------------ - 1
(
t
t
on
Revision 1.11
on
D3
⋅
+
PW
4098
1/f
t
D2
PWM
off
MAX
)
–
D1
1
D0
st
Device
OCF COF
4097µs
4098µs
Status Bits
LIN
Mag
INC
DEC
Mag
18
Even
PAR
D
Angular Position Data
1
D11
2
nd
Device
2
D10
3
D9
(EQ 1)
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