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ADC14155QML-SP

SNAS378L – NOVEMBER 2008 – REVISED FEBRUARY 2019

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Device Support (continued)

POWER SUPPLY REJECTION RATIO (PSRR) is a measure of how well the ADC rejects a change in the power

supply voltage. PSRR is the ratio of the Full-Scale output of the ADC with the supply at the minimum DC supply

limit to the Full-Scale output of the ADC with the supply at the maximum DC supply limit, expressed in dB.

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 d.c.

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 dB, of the rms total of the first nine harmonic

levels at the output to the level of the fundamental at the output. THD is calculated as

(6)

where f1 is the RMS power of the fundamental (output) frequency and f2 through f10 are the RMS power of the

first 9 harmonic frequencies in the output spectrum.

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.

11.2 Receiving Notification of Documentation Updates

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right corner, click on Alert me to register and receive a weekly digest of any product information that has

changed. For change details, review the revision history included in any revised document.

11.3 Community Resources

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contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of

Use.

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among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help

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E2E is a trademark of Texas Instruments.

All other trademarks are the property of their respective owners.

11.5 Electrostatic Discharge Caution

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more

susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.