Datasheet

ADC10065
www.ti.com SNAS225H –JULY 2003–REVISED APRIL 2013
OFFSET ERRORis the input voltage that will cause a transition from a code of 01 1111 1111 to a code of 10
0000 0000.
OUTPUT DELAYis the time delay after the rising edge of the clock before the data update is presented at the
output pins.
PIPELINE DELAY (LATENCY)is the number of clock cycles between initiation of conversion and when that data
is presented to the output driver stage. Data for any given sample is available at the output pins the
Pipeline Delay plus the Output Delay after the sample is taken. New data is available at every clock cycle,
but the data lags the conversion by the pipeline delay.
POSITIVE FULL SCALE ERRORis the difference between the actual last code transition and its ideal value of
1½ LSB below positive full scale.
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 DC.
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 DC.
SPURIOUS FREE DYNAMIC RANGE (SFDR)is the difference, expressed in dB, between the rms values of the
input signal and the peak spurious signal, where a spurious signal is any signal present in the output
spectrum that is not present at the input.
TOTAL HARMONIC DISTORTION (THD)is the ratio, expressed in dBc, of the rms total of the first six harmonic
levels at the output to the level of the fundamental at the output. THD is calculated as:
White Space
where
• f
1
is the RMS power of the fundamental (output) frequency
• f
2
through f
6
are the RMS power in the first 6 harmonic frequencies. (2)
SECOND HARMONIC DISTORTION (2ND HARM) is the difference expressed in dB, between the RMS power
in the input frequency at the output and the power in its 2nd harmonic level at the output.
THIRD HARMONIC DISTORTION (3RD HARM) is the difference, expressed in dB, between the RMS power in
the input frequency at the output and the power in its 3rd harmonic level at the output.
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