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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AD7715 데이터시트(PDF) 11 Page - Analog Devices |
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AD7715 데이터시트(HTML) 11 Page - Analog Devices |
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11 / 40 page  AD7715 Rev. D | Page 11 of 40 TERMINOLOGY Integral Nonlinearity This is the maximum deviation of any code from a straight line passing through the endpoints of the transfer function. The endpoints of the transfer function are zero-scale (not to be confused with bipolar zero), a point 0.5 LSB below the first code transition (000 … 000 to 000 … 001) and Full-Scale, a point 0.5 LSB above the last code transition (111 … 110 to 111 … 111). The error is expressed as a percentage of full scale. Positive Full-Scale Error Positive Full-Scale Error is the deviation of the last code transition (111 . . . 110 to 111 . . . 111) from the ideal AIN(+) voltage (AIN(−) + VREF/GAIN −3/2 LSBs). It applies to both unipolar and bipolar analog input ranges. Unipolar Offset Error Unipolar Offset Error is the deviation of the first code transition from the ideal AIN(+) voltage (AIN(−) + 0.5 LSB) when operating in the unipolar mode. Bipolar Zero Error This is the deviation of the midscale transition (0111 . . . 111 to 1000 . . . 000) from the ideal AIN(+) voltage (AIN(−) − 0.5 LSB) when operating in the bipolar mode. Gain Error This is a measure of the span error of the ADC. It includes full- scale errors but not zero-scale errors. For unipolar input ranges it is defined as (full scale error—unipolar offset error) while for bipolar input ranges it is defined as (full-scale error—bipolar zero error). Bipolar Negative Full-Scale Error This is the deviation of the first code transition from the ideal AIN(+) voltage (AIN(−) − VREF/GAIN + 0.5 LSB), when operating in the bipolar mode. Positive Full-Scale Overrange Positive full-scale overrange is the amount of overhead available to handle input voltages on AIN(+) input greater than AIN−) + VREF/GAIN (for example, noise peaks or excess voltages due to system gain errors in system calibration routines) without introducing errors due to overloading the analog modulator or overflowing the digital filter. Negative Full-Scale Overrange This is the amount of overhead available to handle voltages on AIN(+) below AIN(−) −VREF/GAIN without overloading the analog modulator or overflowing the digital filter. Note that the analog input accepts negative voltage peaks even in the unipolar mode provided that AIN(+) is greater than AIN(−) and greater than AGND − 30 mV. Offset Calibration Range In the system calibration modes, the AD7715 calibrates its offset with respect to the analog input. The offset calibration range specification defines the range of voltages that the AD7715 can accept and still calibrate offset accurately. Full-Scale Calibration Range This is the range of voltages that the AD7715 can accept in the system calibration mode and still calibrate full scale correctly. Input Span In system calibration schemes, two voltages applied in sequence to the AD7715’s analog input define the analog input range. The input span specification defines the minimum and maximum input voltages from zero to full scale that the AD7715 can accept and still calibrate gain accurately. |
유사한 부품 번호 - AD7715_15 |
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유사한 설명 - AD7715_15 |
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