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AS5263
Datasheet - D e t a i l e d D e s c r i p t i o n
7.2 Analog Output
The reference voltage for the Digital-to-Analog converter (DAC) is taken internally from VDD . In this mode, the output voltage is ratiometric to the
supply voltage.
7.2.1
Programming Parameters
The Analog output voltage modes are programmable by OTP. Depending on the application, the analog output can be adjusted. The user can
program the following application specific parameters:
T1
T2
T1Y
T2Y
CLL
CLH
BP
Mechanical angle start point
Mechanical angle end point
Voltage level at the T1 position
Voltage level at the T2 position
Clamping Level Low
Clamping Level High
Break point (transition point 0 to 360 degree)
The above listed parameters are input parameters. Over the provided programming software and programmer, these parameters are converted
and finally written into the AS5263 128-bit OTP memory. More details about the conversion can be found in the AN_AS5163+AS5263_V1.0
application note.
7.2.2
Application Specific Angular Range Programming
The application range can be selected by programming T1 with a related T1Y and T2 with a related T2Y into the AS5263. The internal gain factor
is calculated automatically. The clamping levels CLL and CLH can be programmed independent from the T1 and T2 position and both levels can
be separately adjusted.
Figure 4. Programming of an Individual Application Range
90 degree
Application range
electrical range
T2
T1
100%VDD
CLH
mechanical range
clamping range
high
180 degree
CLL
0 degree
T2Y
CLH
BP
T1Y
CLL
270 degree
0
clamping range
low
T1
T2
Figure 4 shows a simple example of the selection of the range. The mechanical starting point T1 and the mechanical end point T2 define the
mechanical range. A sub range of the internal Cordic output range is used and mapped to the needed output characteristic. The analog output
signal has 12 bit, hence the level T1Y and T2Y can be adjusted with this resolution. As a result of this level and the calculated slope the clamping
region low is defined. The break point BP defines the transition between CLL and CLH . In this example, the BP is set to 0 degree. The BP is also
the end point of the clamping level high CLH . This range is defined by the level CLH and the calculated slope. Both clamping levels can be set
independently form each other. The minimum application range is 12 degrees.
www.austriamicrosystems.com/AS5263
Revision 1.4
10 - 37
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