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AD4680 датащи(PDF) 16 Page - Analog Devices

номер детали AD4680
подробное описание детали  Pseudo Differential Input, Quad, 4 MSPS Simultaneous Sampling, 16-Bit/14-Bit, SAR ADC
PDF  33 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD4680 датащи(HTML) 16 Page - Analog Devices

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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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