CS4922
9 PARAMETER DEFINITIONS
Resolution
The number of bits in the input words to the DACs.
Differential Nonlinearity
The worst case deviation from the ideal codewidth; expressed in LSBs.
Total Harmonic Distortion (THD)
THD is the ratio of the test signal amplitude to the rms sum of all the in-band harmonics of the
test signal.
Instantaneous Dynamic Range
The Signal-to-(Noise + Distortion) ratio (S/(N+D)) with a 1 kHz, -60 dB from full scale DAC
input signal, with 60 dB added to compensate for the small signal. Use of a small signal
reduces the harmonic distortion components of the noise to insignificant levels. Units are in dB.
Interchannel Isolation
The amount of 1kHz signal present on the output of the grounded input channel with 1 kHz,
0dB signal present on the other channel. Units are in dB.
Interchannel Gain Mismatch
The difference in output voltages for each channel with a full scale digital input. Units are in dB.
Frequency Response
Worst case variation in output signal level versus frequency over 10 Hz to 20 kHz. Units in dB.
Out of Band Energy
The ratio of the rms sum of the energy from 0.46×Fs to 2.1×Fs compared to the rms full-scale
signal value. Tested with 48 kHz Fs giving a out-of-band energy range of 22 kHz to 100 kHz.
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