Cirrus Logic CRD4297-1 AMR, Product Data Book

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DS242RD1B1 7
CRD4297-1 AMR
CrystalClear™ AC '97 AMR Audio Modem Riser Reference
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
AUDIO PERFORMANCE EVALUATION
In the above reference designators, the letters in pa-
renthesis designate the full-scale value for that par-
ticular I/O. These are used in the tables below to help clarify which full-scale value applies to the
particular measurement. Values referenced to dig-
ital numbers on the PC are listed with the (d) suffix.
Plots
In the following plots, stereo measurements have
two sets of data per plot and two vertical axes.
Above each vertical axis is a label indicating a
channel that relates to that axis. The data set ex-
tends beyond the vertical axis to indicate its associ-
ation with that axis. Using Figure X as an example,
the top set of data extends beyond the right vertical
axis, which is labeled at the top “RIGHT’, indicat-
ing that the top set of data is the right channel and
associated with the right vertical axis. Likewise,
the bottom set of data extendds beyond the left ver-
tical axis which is labeled at the top “LEFT”, indi-
cating that the bottom set of data is the left channel
and associated with the left vertical axis.
Signal Name Connector Maximum Voltage Reference
Designator
Imp. (k
Ω)
Line In Jack 2.341 V
RMS
0 dB FS (li)
Mic In Jack 0.146 V
RMS
0 dB FS (mi)
Line Out Jack 1.058 V
RMS
0 dB FS (lo) N/A
Speaker Out (8
Ω
) N/A N/A 0 dB FS(so) N/A
Microphones Supported Support Comments
3-Pin Phantom Power (power on ring) Yes
2-Pin Dynamic Yes
2-Pin Phantom Power (power on tip)
Full Duplex (A-D-PC-D-A):
Line In to Line Out Reference Left Right Units Figures
Dynamic Range 83.8 83.8 dB FS A (lo) 97 - 1NXL
THD+N -3 dB FS (li) -81.1 -80.5 dB FS (lo) 97 - 1DXL
Frequency Response Ac = -0.25 dB 20-20k 31-20k Hz 97 - 1MXL
NOTE: TM004: combined test used in lieu of TM002 and TM003
Analog Mixer (A-A):
Line In to Line Out Reference Left Right Units Figures
Dynamic Range 95.4 95.3 dB FS A (lo) 97 - 1NAL
THD+N -3 dB FS (li) -91.2 -90.6 dB FS (lo) 97 - 1DAL
Frequency Response Ac = -0.1 dB 20-20k 20-20k Hz 97 - 1MAL
Crosstalk f = 10 kHz -66.7 N/A dB FS (lo) 97 - 1CAL
Analog Mixer (A-A):
Mic In to Line Out Reference Left Right Units Figures
Dynamic Range Gain = 0 dB 93.9 N/A dB FS A (lo) 97 - 1NAM
THD+N -3 dB FS (mi) -85.9 N/A dB FS (lo) 97 - 1DAM
Frequency Response Ac = -3 dB 58-15.5k N/A Hz 97 - 1MAM
NOTE: Mic In is Mono