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AS5045 Datasheet

12-Bit Programmable Magnetic Rotary Position Sensor

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AS5045
12-Bit Programmable Magnetic Rotary
Position Sensor
General Description
Figure 1:
Added Value of Using AS5045
The AS5045 is a contactless magnetic position sensor for
accurate angular measurement over a full turn of 360°. It is a
system-on-chip, combining integrated Hall elements, analog
front end and digital signal processing in a single device.
To measure the angle, only a simple two-pole magnet, rotating
over the center of the chip, is required. The magnet may be
placed above or below the IC.
The absolute angle measurement provides instant indication of
the magnet’s angular position with a resolution of
0.0879° = 4096 positions per revolution. This digital data is
available as a serial bit stream and as a PWM signal.
An internal voltage regulator allows the AS5045 to operate at
either 3.3 V or 5 V supplies.
Ordering Information and Content Guide appear at end of
datasheet.
Key Benefits & Features
The benefits and features of AS5045, 12-Bit Programmable
Magnetic Rotary Position Sensor are listed below:
Benefits
Features
Highest reliability and durability in harsh
environments
Contactless absolute angle position measurement
Great flexibility during assembly
User programmable zero position
Operation safety
Diagnostic modes for magnet detection and power supply
loss
Lower material cost (no magnetic
shielding needed)
Immune to external magnetic stray fields
Two digital 12-bit absolute outputs:
• Serial interface and
• Pulse width modulated (PWM) output
Failure detection mode for magnet placement monitoring
and loss of power supply
“Red-Yellow-Green” indicators display placement of magnet
in Z-axis
ams Datasheet
[v2-01] 2017-Jul-13
Page 1
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ams

AS5045 Datasheet Preview

AS5045 Datasheet

12-Bit Programmable Magnetic Rotary Position Sensor

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Figure 2:
AS5045 Block Diagram
AS5045 − General Description
Serial read-out of multiple interconnected AS5045 devices
using Daisy Chain mode
Tolerant to magnet misalignment and airgap variations
Wide temperature range: - 40ºC to 125ºC
Small Pb-free package: SSOP-16 (5.3mm x 6.2mm)
Applications
The AS5045 is ideal for industrial applications like
Robotics,
Stepper motor control,
RC servo control and
Replacement of high-end potentiometers.
Block Diagram
The functional blocks of this device are shown below:
VDD5V
Mode
VDD3V3
LDO 3.3V
Sin
Hall Array
Cos
&
Frontend
Amplifier
Ang
DSP
Mag
OTP
Register
PWM
Interface
Absolute
Interface
(SSI)
AS5045
MagINCn
MagDECn
PWM
DO
CSn
CLK
Prog_DI
Page 2
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ams Datasheet
[v2-01] 2017-Jul-13



Part Number AS5045
Description 12-Bit Programmable Magnetic Rotary Position Sensor
Maker ams
Total Page 3 Pages
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AS5045 Datasheet PDF





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