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AD7859AS Datasheet(PDF) 10 Page - Analog Devices |
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AD7859AS Datasheet(HTML) 10 Page - Analog Devices |
10 / 28 page AD7859/AD7859L REV. A –10– Table IV. Calibration Selection CALMD CALSLT1 CALSLT0 Calibration Type 00 0 A full internal calibration is initiated. First the internal DAC is calibrated, then the internal gain error and finally the internal offset error are removed. This is the default setting. 0 0 1 First the internal gain error is removed, then the internal offset error is removed. 0 1 0 The internal offset error only is calibrated out. 0 1 1 The internal gain error only is calibrated out. 10 0 A full system calibration is initiated. First the internal DAC is calibrated, followed by the system gain error calibration, and finally the system offset error calibration. 1 0 1 First the system gain error is calibrated out, followed by the system offset error. 1 1 0 The system offset error only is removed. 1 1 1 The system gain error only is removed. Table IIIa. Channel Selection for AD7859/AD7859L Differential Sampling (SGL/DIFF = 0) AMODE CHSLT AIN(+)*AIN(–)* Bipolar or 2 1 0 Unipolar 0 0 0 0 AIN1 AIN2 Unipolar 0 0 0 1 AIN3 AIN4 Unipolar 0 0 1 0 AIN5 AIN6 Unipolar 0 0 1 1 AIN7 AIN8 Unipolar 0 1 x x x x Not Used 1 0 0 0 AIN1 AIN2 Bipolar 1 0 0 1 AIN3 AIN4 Bipolar 1 0 1 0 AIN5 AIN6 Bipolar 1 0 1 1 AIN7 AIN8 Bipolar 1 1 x x x x Not Used *AIN(+) refers to the positive input seen by the AD7859/AD7859L sample-and- hold circuitry. AIN(–) refers to the negative input seen by the AD7859/AD7859L sample-and- hold circuitry. Table IIIb. Channel Selection for AD7859/AD7859L Single-Ended Sampling (SGL/DIFF = 1) AMODE CHSLT AIN(+)*AIN(–)* Bipolar or 2 1 0 Unipolar 0 0 0 0 AIN1 AGND Unipolar 0 0 0 1 AIN3 AGND Unipolar 0 0 1 0 AIN5 AGND Unipolar 0 0 1 1 AIN7 AGND Unipolar 0 1 0 0 AIN2 AGND Unipolar 0 1 0 1 AIN4 AGND Unipolar 0 1 1 0 AIN6 AGND Unipolar 0 1 1 1 AIN8 AGND Unipolar 1 0 0 0 AIN1 AIN8 Unipolar 1 0 0 1 AIN3 AIN8 Unipolar 1 0 1 0 AIN5 AIN8 Unipolar 1 0 1 1 AIN7 AIN8 Unipolar 1 1 0 0 AIN2 AIN8 Unipolar 1 1 0 1 AIN4 AIN8 Unipolar 1 1 1 0 AIN6 AIN8 Unipolar 1 1 1 1 AIN8 AIN8 Unipolar |
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