2

1

f

2

6

f

2

2

f

10

‡

A

A

+

+

A

log

20

=

THD

ADC102S101

www.ti.com

SNAS287G – FEBRUARY 2005 – REVISED MARCH 2013

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

•

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 time. In the case of the ADC102S101, this is 16 SCLK periods.

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