AS5245 Datasheet, PDF (1/33 Pages) ams AG – Programmable 360º Magnetic Angle Encoder with Absolute SSI and PWM Output

Data Sheet
AS5245
Programmable 360º Magnetic Angle Encoder with Absolute SSI and
PWM Output
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.
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 0.0879º = 4096
positions per revolution. This digital data is available as a serial bit
stream and as a PWM signal.
An internal voltage regulator allows operation of the AS5245 from
3.3V or 5.0V supplies.
The AS5245 is fully automotive qualified to AEC-Q100, grade 0.
2 Key Features
Contactless high resolution rotational position encoding over a
full turn of 360º
Two digital 12-bit absolute outputs
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
“Red-Yellow-Green” indicators display placement of magnet in
Z-axis
Tolerant to magnet misalignment and air gap variations
Wide temperature range: - 40ºC to +150ºC
Unique Chip Identifier
Fully automotive qualified to AEC-Q100, grade 0
Small package: QFN 32 LD (7x7)
3 Applications
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.
Figure 1. AS5245 Block Diagram
VDD3V3
VDD5V
Mode_Index
LDO 3.3V
Sin
Hall Array
Cos
&
Frontend
Amplifier
Mux
Ang
DSP
Mag
OTP
Register
AS5245
PWM
Interface
Absolute
Interface
(SSI)
Incremental
Interface
MagINCn
MagDECn
PWM
DO
CSn
CLK
PDIO
DTEST1_A
DTEST2_B
Note: This Block Diagram presents only one die
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