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ADC101C021 Datasheet(PDF) 10 Page - Texas Instruments |
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ADC101C021 Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 44 page  SCL SDA tHD;STA tLOW tr tHD;DAT tHIGH tf tSU;DAT tSU;STA tSU;STO tf START REPEATED START STOP tHD;STA START tSP tr tBUF ADC101C021, ADC101C027 SNAS446D – FEBRUARY 2008 – REVISED FEBRUARY 2013 www.ti.com Timing Diagrams Figure 1. Serial Timing Diagram Specification Definitions ACQUISITION TIME is the time required for the ADC to acquire the input voltage. During this time, the hold capacitor is charged by the input voltage. APERTURE DELAY is the time between the start of a conversion and the time when the input signal is internally acquired or held for conversion. CONVERSION TIME is the time required, after the input voltage is acquired, for the ADC to convert the input voltage to a digital word. DIFFERENTIAL NON-LINEARITY (DNL) is the measure of the maximum deviation from the ideal step size of 1 LSB. EFFECTIVE NUMBER OF BITS (ENOB, or EFFECTIVE BITS) is another method of specifying Signal-to-Noise and Distortion or SINAD. ENOB is defined as (SINAD - 1.76) / 6.02 and says that the converter is equivalent to a perfect ADC of this (ENOB) number of bits. FULL POWER BANDWIDTH is a measure of the frequency at which the reconstructed output fundamental drops 3 dB below its low frequency value for a full scale input. GAIN ERROR is the deviation of the last code transition (111...110) to (111...111) from the ideal (VREF - 1.5 LSB), after adjusting for offset error. INTEGRAL NON-LINEARITY (INL) is a measure of the deviation of each individual code from a line drawn from negative full scale (½ LSB below the first code transition) through positive full scale (½ LSB above the last code transition). The deviation of any given code from this straight line is measured from the center of that code value. INTERMODULATION DISTORTION (IMD) is the creation of additional spectral components as a result of two sinusoidal frequencies being applied to an individual ADC input at the same time. It is defined as the ratio of the power in both the second and third order intermodulation products to the power in one of the original frequencies. Second order products are fa ± fb, where fa and fb are the two sine wave input frequencies. Third order products are (2fa ± fb ) and (fa ± 2fb). IMD is usually expressed in dB. MISSING CODES are those output codes that will never appear at the ADC output. The ADC101C021 is guaranteed not to have any missing codes. OFFSET ERROR is the deviation of the first code transition (000...000) to (000...001) from the ideal (i.e. GND + 0.5 LSB). SIGNAL TO NOISE RATIO (SNR) is the ratio, expressed in dB, of the rms value of the input signal to the rms value of the sum of all other spectral components below one-half the sampling frequency, not including harmonics or d.c. SIGNAL TO NOISE PLUS DISTORTION (S/N+D or SINAD) Is the ratio, expressed in dB, of the rms value of the input signal to the rms value of all of the other spectral components below half the clock frequency, including harmonics but excluding d.c. 10 Submit Documentation Feedback Copyright © 2008–2013, Texas Instruments Incorporated Product Folder Links: ADC101C021 ADC101C027 |
Similar Part No. - ADC101C021_14 |
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Similar Description - ADC101C021_14 |
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