CS4294-JQ CIRRUS [Cirrus Logic], CS4294-JQ Datasheet - Page 39

• Manufacturer Part Number: CS4294-JQ
• Description: SoundFusion Audio/Docking Codec 97 (AMC 97)
• Manufacturer: CIRRUS [Cirrus Logic]

Frequency Response (FR)
Dynamic Range (DR)
Total Harmonic Distortion plus Noise (THD+N)
Signal to Noise Ratio (SNR)
Interchannel Isolation
Interchannel Gain Mismatch
PATHS
10. REFERENCES
DS326PP4
FR is the deviation in signal level verses frequency. The 0 dB reference point is 1 kHz. The
amplitude corner, Ac, lists the maximum deviation in amplitude above and below the 1 kHz
reference point. The listed minimum and maximum frequencies are guaranteed to be within the
Ac from minimum frequency to maximum frequency inclusive.
DR is the ratio of the RMS full-scale signal level divided by the RMS sum of the noise floor,
in the presence of a signal, available at any instant in time (no change in gain settings between
measurements). Measured over a 20 Hz to 20 kHz bandwidth with units in dB FS A.
THD+N is the ratio of the RMS sum of all non-fundamental frequency components, divided by
the RMS full-scale signal level. It is tested using a -3 dB FS input signal and is measured over
a 20 Hz to 20 kHz bandwidth with units in dB FS.
SNR, similar to DR, is the ratio of an arbitrary sinusoidal input signal to the RMS sum of the
noise floor, in the presence of a signal. It is measured over a 20 Hz to 20 kHz bandwidth with
units in dB.
The amount of 1 kHz signal present on the output of the grounded AC-coupled line input
channel with 1 kHz, 0 dB, signal present on the other line input channel. Units in dB.
For the ADCs, the difference in input voltage to get an equal code on both channels. For the
DACs, the difference in output voltages for each channel when both channels are fed the same
code. Units in dB.
A-D: Analog in, through the ADC, onto the serial link.
D-A: Serial interface inputs through the DAC to the analog output.
A-A: Analog in to Analog out (analog mixer).
Intel, Audio Codec ‘97 Component Specification, Revision 2.1, May 22,1998.
http://developer.intel.com/pc-supp
/platform/ac97/
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