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AD4680 датащи(PDF) 16 Page - Analog Devices |
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AD4680 датащи(HTML) 16 Page - Analog Devices |
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16 / 33 page ![]() Data Sheet AD7383-4/AD7384-4 THEORY OF OPERATION analog.com Rev. 0 | 16 of 33 ADC TRANSFER FUNCTION The AD7383-4/AD7384-4 use a 2.5 V to 3.3 V reference voltage. The AD7383-4/AD7384-4 convert the differential voltage of the analog inputs (AINA+ and AINA−, AINB+ and AINB−, AINC+ and AINC−, and AIND+ and AIND−) into a digital output. The conversion result is MSB first, twos complement. The LSB size is VREF/2N, where N is the ADC resolution. The ADC resolution is determined by the resolution of the device chosen and if resolution boost mode is enabled. Table 10 outlines the LSB size expressed in microvolts for different resolutions and reference voltage options. The ideal transfer characteristic of the AD7383-4/AD7384-4 is shown in Figure 27. Figure 27. ADC Ideal Transfer Function (FSR = Full-Scale Range) Table 10. LSB Size Resolution (Bits) 2.5 V Reference (µV) 3.3 V Reference (µV) 14 152.6 201.4 16 38.1 50.3 18 9.53 12.6 |
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