cs4237b Cirrus Logic, Inc., cs4237b Datasheet - Page 108

• Manufacturer Part Number: cs4237b
• Description: Crystalclear Advanced Audio System With 3d Sound
• Manufacturer: Cirrus Logic, Inc.

PARAMETER DEFINITIONS
Resolution
Differential Nonlinearity
Total Dynamic Range
Instantaneous Dynamic Range
Total Harmonic Distortion (THD)
Interchannel Isolation
Interchannel Gain Mismatch
Offset Error
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The number of bits in the input words to the DACs, and in the output words in the ADCs.
The worst case deviation from the ideal code width. Units in LSB.
TDR is the ratio of the RMS value of a full scale signal to the lowest obtainable noise floor. It
is measured by comparing a full scale signal to the lowest noise floor possible in the codec (i.e.
attenuation bits for the DACs at full attenuation). Units in dB.
IDR is the ratio of a full-scale RMS signal to the RMS noise available at any instant in time,
without changing the input gain or output attenuation settings. It is measured using S/(N+D)
with a 1 kHz, -60 dB input signal, with 60 dB added to compensate for the small input signal.
Use of a small input signal reduces the harmonic distortion components to insignificance when
compared to the noise. Units in dB.
THD is the ratio of the test signal amplitude to the RMS sum of all the in-band harmonics of
the test signal. THD is measured using an input signal which is 3dB below typical full-scale,
and referenced to typical full scale.
The amount of 1 kHz signal present on the output of the grounded input channel with 1 kHz
0 dB signal present on the other channel. Units in dB.
For the ADCs, the difference in input voltage that generates the full scale code for each
channel. For the DACs, the difference in output voltages for each channel with a full scale
digital input. Units in dB.
For the ADCs, the deviation in LSBs of the output from mid-scale with the selected input
grounded. For the DACs, the deviation in volts of the output from VREF with mid-scale input
code.
CS4237B
DS213PP4