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AS5263 Datasheet(PDF) 11 Page - ams AG |
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AS5263 Datasheet(HTML) 11 Page - ams AG |
11 / 38 page www.austriamicrosystems.com/AS5263 Revision 1.4 10 - 37 AS5263 Datasheet - Detailed Descr i pti on 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: 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 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. T1 Mechanical angle start point T2 Mechanical angle end point T1Y Voltage level at the T1 position T2Y Voltage level at the T2 position CLL Clamping Level Low CLH Clamping Level High BP Break point (transition point 0 to 360 degree) T1 T2 CLL CLH BP T1 T2 100%VDD 0 Application range T1Y T2Y CLL CLH mechanical range electrical range clamping range low clamping range high 270 degree 0 degree 180 degree 90 degree |
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