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ADUC702X Datasheet(PDF) 6 Page - Analog Devices |
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ADUC702X Datasheet(HTML) 6 Page - Analog Devices |
6 / 78 page ADuC702x Series Preliminary Technical Data Rev. PrA | Page 6 of 78 TERMINOLOGY ADC Specifications Integral Nonlinearity This is the maximum deviation of any code from a straight line passing through the endpoints of the ADC transfer function. The endpoints of the transfer function are zero scale, a point 1/2 LSB below the first code transition and full scale, a point 1/2 LSB above the last code transition. Differential Nonlinearity This is the difference between the measured and the ideal 1 LSB change between any two adjacent codes in the ADC. Offset Error This is the deviation of the first code transition (0000 . . . 000) to (0000 . . . 001) from the ideal, i.e., +1/2 LSB. Gain Error This is the deviation of the last code transition from the ideal AIN voltage (Full Scale – 1.5 LSB) after the offset error has been adjusted out. Signal to (Noise + Distortion) Ratio This is the measured ratio of signal to (noise + distortion) at the output of the ADC. The signal is the rms amplitude of the fundamental. Noise is the rms sum of all nonfundamental signals up to half the sampling frequency (fS/2), excluding dc. The ratio is dependent upon the number of quantization levels in the digitisation process; the more levels, the smaller the quantization noise. The theoretical signal to (noise + distortion) ratio for an ideal N-bit converter with a sine wave input is given by: Signal to (Noise + Distortion) = (6.02N + 1.76) dB Thus for a 12-bit converter, this is 74 dB. Total Harmonic Distortion Total Harmonic Distortion is the ratio of the rms sum of the harmonics to the fundamental. DAC SPECIFICATIONS Relative Accuracy Relative accuracy or endpoint linearity is a measure of the maximum deviation from a straight line passing through the endpoints of the DAC transfer function. It is measured after adjusting for zero error and full-scale error. Voltage Output Settling Time This is the amount of time it takes for the output to settle to within a 1 LSB level for a full-scale input change.. |
Similar Part No. - ADUC702X_1 |
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Similar Description - ADUC702X_1 |
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