Revision 1.1, October-2009
Page 1 of 10
www.austriamicrosystems.com
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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.
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The AS5245 Demoboard
The AS5245 demoboard is a complete rotary encoder system with built-in microcontroller, USB interface, graphical LCD
display and PWM output LED.
The board is USB powered or externally supplied with a 9V battery for standalone operation.
Figure 1: AS5245 Demoboar d hardware with mounted magnet knob
AS5245-DB-v1.0 Demoboard
OPERATION MANUAL
AS5245
Programmable Magnetic Rotary Encoder
External Encoder
USB cable to the PC
(backside)
Indicator LEDs for MagInc,
MagDec and PWM
SiLabs C8051F320
microcontroller
(backside)
9V battery connector
(standalone only)
Knob with D5x2.5mm
diametral magnet,
2mm over the AS5245
Onboard AS5245 output signals connector
MagINCn, MagDECn and PWM, etc.
External (left) – Onboard
(right) encoder selection
LCD display (for
standalone mode)
ams
AG
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