Datasheet

2
1f
2
6f
2
2f
10
‡
A
A++A
log20=THD
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ADC082S021
www.ti.com SNAS282D –APRIL 2005–REVISED MARCH 2013
TOTAL HARMONIC DISTORTION (THD) is the ratio, expressed in 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
• A
f1
is the RMS power of the input frequency at the output and A
f2
through A
f6
are the RMS power in the first 5
harmonic frequencies. Accurate THD measurement requires a spectrally pure sine wave (monotone) at the
ADC input. (2)
THROUGHPUT TIME is the minimum time required between the start of two successive conversion. It is the
acquisition time plus the conversion and read out times. In the case of the ADC082S021, this is 16 SCLK
periods.
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