WM8990ECS/RV Wolfson Microelectronics, WM8990ECS/RV Datasheet - Page 166

• Manufacturer Part Number: WM8990ECS/RV
• Description: Audio CODECs Stereo CODEC w.Class AB/D speaker driver
• Manufacturer: Wolfson Microelectronics

Specifications of WM8990ECS/RV

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8990
w
DAC FILTER RESPONSES
Figure 94 DAC Digital Filter Frequency Response (Normal
Mode)
Figure 96 DAC Digital Filter Frequency Response (Sloping
Stopband Mode)
-110
-130
-150
-110
-130
-150
-10
-30
-50
-70
-90
-10
-30
-50
-70
-90
10
10
0
0
0.5
0.5
1
1
MAGNITUDE(dB)
MAGNITUDE(dB)
Frequency (fs)
Frequency (fs)
DAC STOPBAND ATTENUATION
The DAC digital filter type is selected by the DAC_SB_FILT register bit as shown in Table 91.
Table 91 DAC Filter Selection
R10 (0Ah)
1.5
1.5
REGISTER
ADDRESS
2
2
2.5
2.5
BIT
8
DAC_SB_FI
LT
3
3
LABEL
Figure 95 DAC Digital Filter Ripple (Normal Mode)
Figure 97 DAC Digital Filter Ripple (Sloping Stopband
Mode)
-0.005
-0.05
-0.15
-0.25
-0.35
-0.45
0.035
0.025
0.015
0.005
0.05
-0.1
-0.2
-0.3
-0.4
-0.5
0.04
0.03
0.02
0.01
0
0
0
0
0b
DEFAULT
0.05
0.05
0.1
0.1
0.15
0.15
Selects DAC filter characteristics
0 = Normal mode
1 = Sloping stopband mode
MAGNITUDE(dB)
MAGNITUDE(dB)
0.2
0.2
Frequency (fs)
Frequency (fs)
0.25
0.25
DESCRIPTION
0.3
0.3
PD, March 2009, Rev 4.0
0.35
0.35
Production Data
0.4
0.4
0.45
0.45
0.5
0.5
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