WM8731CLSEFL/R View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

WM8731CLSEFL/R

Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates

Cirrus Logic

'WM8731CLSEFL/R' PDF : 65 Pages View PDF

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WM8731 / WM8731L
Production Data
REGISTER
ADDRESS
BIT
LABEL
7
CLKODIV2
0001001
0
ACTIVE
Active Control
0001111
Reset Register
8:0 RESET
Table 30 Register Map Description
DEFAULT
DESCRIPTION
0
0
not reset
CLKOUT divider select
1 = CLOCKOUT is Core Clock
divided by 2
0 = CLOCKOUT is Core Clock
Activate Interface
1 = Active
0 = Inactive
Reset Register
Writing 00000000 to register resets
device
DIGITAL FILTER CHARACTERISTICS
The ADC and DAC employ 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
DAC Filter Type 0 (USB mode, 250fs operation)
Passband
+/- 0.03dB
0
-6dB
Passband Ripple
Stopband
0.584fs
Stopband Attenuation
f > 0.584fs
-50
DAC Filter Type 1 (USB mode, 272fs or Normal mode operation)
Passband
+/- 0.03dB
0
-6dB
Passband Ripple
Stopband
0.5465fs
Stopband Attenuation
f > 0.5465fs
-50
Table 31 Digital Filter Characteristics
TYP
0.5fs
0.5fs
3.7
10.4
21.6
0.5fs
0.5fs
MAX
UNIT
0.416fs
+/- 0.05
dB
dB
0.4535fs
+/- 0.05
dB
dB
Hz
0.416fs
+/-0.03
dB
dB
0.4535fs
+/- 0.03
dB
dB
w
PD, Rev 4.9, October 2012
54

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