XWM8739SEDS/V View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'XWM8739SEDS/V' PDF : 37 Pages View PDF
WM8739
Production Data
REGISTER
ADDRESS
0001001
Active Control
BIT
LABEL
0
ACTIVE
0001111
Reset Register
8:0 RESET
Table 19 Register Map Description
DEFAULT
DESCRIPTION
0
not reset
Activate Interface
1 = Active
0 = Inactive
Reset Register
Write 000000000 to register triggers
reset
Note
1. All other bits not explicitly defined in the register table should be set to zero, unless specified
otherwise (see Powerdown section).
DIGITAL FILTER CHARACTERISTICS
The ADC employs different digital filters. There are 4 types of digital filter, called Type 0, 1, 2 and 3.
The performance of Types 0 and 1 is listed in the table below, the responses of all filters is shown in
the proceeding pages.
PARAMETER
TEST CONDITIONS
MIN
ADC Filter Type 0 (USB Mode, 250fs operation)
Passband
+/- 0.05dB
0
-6dB
Passband Ripple
Stopband
0.584fs
Stopband Attenuation
f > 0.584fs
-60
ADC Filter Type 1 (USB mode, 272fs or Normal mode operation)
Passband
+/- 0.05dB
0
-6dB
Passband Ripple
Stopband
0.5465fs
Stopband Attenuation
f > 0.5465fs
-60
High Pass Filter Corner
Frequency
-3dB
-0.5dB
-0.1dB
Table 20 Digital Filter Characteristics
TYP
0.5fs
MAX
0.416fs
+/- 0.05
0.5fs
0.4535fs
+/- 0.05
3.7
10.4
21.6
UNIT
dB
dB
dB
dB
Hz
TERMINOLOGY
1. Stop Band Attenuation (dB) - the degree to which the frequency spectrum is attenuated (outside audio band)
2. Pass-band Ripple – any variation of the frequency response in the pass-band region
w
PD, Rev 4.2, July 2008
31
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