AS5040 AB austriamicrosystems, AS5040 AB Datasheet - Page 5

• Manufacturer Part Number: AS5040 AB
• Description: BOARD ADAPTER AS5040
• Manufacturer: austriamicrosystems

Specifications of AS5040 AB

• Sensor Type: Magnetic, Rotary Position
• Sensing Range: 360°
• Interface: Serial
• Voltage - Supply: 9V
• Embedded: No
• Utilized Ic / Part: AS5040
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Sensitivity: -

AS5040 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER
Adapter PCB Operation Manual
Output modes:
a) PWM output:
no additional components are necessary. Once the power supply has been applied, the angle information is
available at the PWM pin (pin1 of J1)
b) Incremental output:
no additional components are necessary. Once the power supply has been applied, the angle information is
available at the incremental outputs: A,B and Index (pins 6, 5 and 3 of J1)
c) absolute angle information
To access the 10-bit absolute angle information, an external microcontroller must be connected as shown in
Figure 5. Make sure that the controller is able to drive the CSn pin with the connected pulldown resistor (R7). If
necessary, remove this resistor.
The clock rate can be as high as 1MHz. There is no minimum clock rate. Data can also be clocked manually.
The digital I/O's of the AS5040 are buffered by VDD5V, therefore the digital I/O's of the controller should be at the
same voltage level (see power supply options table).
d) Magnetic field strength status; Pushbutton function
no additional components are necessary. The two open-drain outputs MagInc and MagDec (pins 8 and 7 of J1)
will turn on/off as the magnetic field (distance between magnet and chip surface) changes. When both outputs are
on, the magnetic field is not within the recommended range (see datasheet).
Programming (zapping) the Chip.
For programming the AS5040, 3 digital signals are required: CSn, Prog and CLK (see datasheet). For permanent
writing, VPROG must be elevated to 7.5V during the programming cycle.
For immediate programming, this PCB can be connected directly to the AS5040 demoboard (available separately),
where all the programming timings are generated by the onboard microcontroller.
Revision A.03 04. Jul.06
www.austriamicrosystems.com
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