CS4334/5/6/7/8/9

22

DS248PP3

6. PARAMETER DEFINITIONS

Total Harmonic Distortion + Noise (THD+N)- The ratio of the rms value of the signal to the

rms sum of all other spectral components over the specified bandwidth (typically 10Hz to

20kHz), including distortion components. Expressed in decibels.

Dynamic Range - The ratio of the full scale rms value of the signal to the rms sum of all other

spectral components over the specified bandwidth. Dynamic range is a signal-to-noise

measurement over the specified bandwidth made with a -60 dBFS signal. 60 dB is then added

to the resulting measurement to refer the measurement to full scale. This technique ensures that

the distortion components are below the noise level and do not effect the measurement. This

measurement technique has been accepted by the Audio Engineering Society, AES17-1991, and

the Electronic Industries Association of Japan, EIAJ CP-307.

Interchannel Isolation - A measure of crosstalk between the left and right channels. Measured

for each channel at the converter’s output with all zeros to the input under test and a full-scale

signal applied to the other channel. Units in decibels.

Interchannel Gain Mismatch - The gain difference between left and right channels. Units in

decibels.

Gain Error - The deviation from the nominal full scale analog output for a full scale digital

input.

7. REFERENCES

1) "How to Achieve Optimum Performance from

Delta-Sigma A/D & D/A Converters" by

Steven Harris. Paper presented at the 93rd Con-

vention of the Audio Engineering Society, Oc-

tober 1992.

2) CDB4334/5/6/7/8/9 Evaluation Board Datasheet