Revision 1.3, 22-Jul-2009
Page 1 of 12
www.austriamicrosystems.com
1
General Overview
The AS5045/AS5145A/B is a contactless magnetic rotary encoder 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/AS5145A/B to operate at either 3.3 V or 5 V supplies
Note:
AS5145A/B are pre-programmed versions of AS5145. It provides 10bit (A) or 12bit (B) incremental output
.
2
The AS5045/AS5145A/B Demoboard
The AS5x45 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: AS5x45 Demoboar d hardware with mounted magnet knob
3
Operating the AS5045/AS5145A/B Demoboard
The AS5x45 demoboard can be used in several ways:
•
As standalone unit supplied by a 9V battery
Connect a 9V battery to the battery connector on the top right side of the board. No other connections are required.
•
As standalone unit supplied by an USB port
Connect the demoboard to a PC using a USB/USB cable (included in demoboard shipment). The board is supplied by
the 5V supply of the USB port. No other connections are required.
•
As input device for the AS5000 Programmer GUI software
AS5045 / AS5145 Demoboard
9V battery connector
(standalone only)
USB cable to the PC
SiLabs C8051F320
microcontroller
Onboard AS5x45 output signals connector and indicators
MagINCn, MagDECn (J7) and PWM (J4) only are available with AS5045 and AS5145
Knob with D5x2.5mm
diametral magnet,
2mm over the AS5x45
LCD display (for standalone mode)
External (left) – Onboard (right)
encoder selection switch SW1
J6: External Encoder
SSI Connector
Operation Manual
ams
AG
Technical
content
still
valid
