Data Sheet
AS5245
Programmable 360º Magnetic Angle Encoder with Absolute SSI and
PWM Output
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Two digital 12-bit absolute outputs
1 General Description
The AS5245 is a contactless magnetic angle encoder for accurate
measurement up to 360º and includes two AS5145 devices in a
punched stacked leadframe.
Quadrature A/B (10- or 12-bit) and Index output signal
User programmable zero position
Failure detection mode for magnet placement monitoring and
loss of power supply
It is a system-on-chip, combining integrated Hall elements, analog
front end and digital signal processing in a single device.
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“Red-Yellow-Green” indicators display placement of magnet in
Z-axis
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.
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Tolerant to magnet misalignment and air gap variations
Wide temperature range: - 40ºC to +150ºC
Unique Chip Identifier
The absolute angle measurement provides instant indication of the
magnet’s angular position with a resolution of 0.0879º = 4096
positions per revolution. This digital data is available as a serial bit
stream and as a PWM signal.
Fully automotive qualified to AEC-Q100, grade 0
Small package: QFN 32 LD (7x7)
An internal voltage regulator allows operation of the AS5245 from
3.3V or 5.0V supplies.
3 Applications
The AS5245 is fully automotive qualified to AEC-Q100, grade 0.
The AS5245 is ideal for applications with an angular travel range
from a few degrees up to a full turn of 360º. The device is suitable for
Automotive applications like Throttle position sensors, Gas/brake
pedal position sensing, Headlight position control, Contactless rotary
position sensing, Front panel rotary switches and Replacement of
potentiometer.
2 Key Features
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Contactless high resolution rotational position encoding over a
full turn of 360º
Figure 1. AS5245 Block Diagram
VDD3V3
MagINCn
MagDECn
VDD5V
LDO 3.3V
PWM
PWM
Interface
Sin
Ang
DO
DSP
Absolute
Interface
(SSI)
Cos
Mag
Hall Array
&
CSn
Frontend
Amplifier
CLK
OTP
Register
PDIO
DTEST1_A
DTEST2_B
Incremental
Interface
Mux
AS5245
Mode_Index
Note: This Block Diagram presents only one die
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Revision 1.5
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