SINADR

Signal-to-noise and distortion ratio

It has been suggested that this article be merged into SINAD. (Discuss) Proposed since September 2024.

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Signal-to-noise and distortion ratio (SINADR[1]) is a measurement of the purity of a signal. SINADR is typically used in data converter specifications. SINADR is defined as:

S I N A D R = P s i g n a l P q u a n t i z a t i o n E r r o r + P r a n d o m N o i s e + P d i s t o r t i o n {\displaystyle \mathrm {SINADR} ={\frac {P_{\mathrm {signal} }}{P_{\mathrm {quantizationError} }+P_{\mathrm {randomNoise} }+P_{\mathrm {distortion} }}}}

where  P {\displaystyle P} is the average power of the signal, quantization error, random noise and distortion components. SINADR is usually expressed in dB. SINADR is a standard metric for analog-to-digital converter and digital-to-analog converter.

SINADR (in dB) is related to effective number of bits (ENOB) by the following equation:

S I N A D R = E N O B ⋅ 6.02 + 1.76 {\displaystyle \mathrm {SINADR} =ENOB\cdot 6.02+1.76}

## References

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1. ^ Lavrador, P.M.; Borgesdecarvalho, N.; Pedro, J.C. (March 2004). "Evaluation of signal-to-noise and distortion ratio degradation in nonlinear systems". IEEE Transactions on Microwave Theory and Techniques. 52 (3): 813–822. Bibcode:2004ITMTT..52..813L. doi:10.1109/TMTT.2004.823543. ISSN 0018-9480.

## See also

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* Signal-to-noise ratio

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