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ADC101S021 데이터시트(PDF) 9 Page - Texas Instruments |
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ADC101S021 데이터시트(HTML) 9 Page - Texas Instruments |
9 / 23 page W THD = 20 log10 Af1 2 Af2 2 + + Af6 2 ADC101S021 www.ti.com SNAS307G – JULY 2005 – REVISED JANUARY 2014 MISSING CODES are those output codes that will never appear at the ADC outputs. The ADC101S021 is ensured 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. SPURIOUS FREE DYNAMIC RANGE (SFDR) is the difference, expressed in dB, between the desired signal amplitude to the amplitude of the peak spurious spectral component, where a spurious spectral component is any signal present in the output spectrum that is not present at the input and may or may not be a harmonic. TOTAL HARMONIC DISTORTION (THD) is the ratio, expressed in dB or dBc, of the rms total of the first five harmonic components at the output to the rms level of the input signal frequency as seen at the output. THD is calculated as where • Af1 is the RMS power of the input frequency at the output • Af2 through Af6 are the RMS power in the first 5 harmonic frequencies (1) THROUGHPUT TIME is the minimum time required between the start of two successive conversion. It is the acquisition time plus the conversion time. Copyright © 2005–2014, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: ADC101S021 |
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