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WM8912 Datasheet(PDF) 29 Page - Wolfson Microelectronics plc

Part # WM8912
Description  Ultra Low Power DAC with Headphone Driver for Portable Audio Applications
PDF  128 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8912 Datasheet(HTML) 29 Page - Wolfson Microelectronics plc

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Production Data
WM8912
w
PD, Rev 4.0, September 2010
29
EQ GAIN SETTING
GAIN (DB)
00000
-12
00001
-11
00010
-10
00011
-9
00100
-8
00101
-7
00110
-6
00111
-5
01000
-4
01001
-3
01010
-2
01011
-1
01100
0
01101
+1
01110
+2
01111
+3
10000
+4
10001
+5
10010
+6
10011
+7
10100
+8
10101
+9
10110
+10
10111
+11
11000
+12
11001 to 11111
Reserved
Table 12 EQ Gain Control
RETUNE
TM MOBILE MODE
ReTuneTM Mobile mode provides a comprehensive facility for the user to define the cut-off/centre
frequencies and filter bandwidth for each EQ band, in addition to the gain controls already described.
This enables the EQ to be accurately customised for a specific transducer characteristic or desired
sound profile.
The EQ enable and EQ gain controls are the same as defined for the default mode. The additional
coefficients used in ReTuneTM Mobile mode are held in registers R140 to R157. These coefficients
are derived using tools provided in Wolfson’s WISCE™ evaluation board control software.
Please contact your local Wolfson representative for more details.
EQ FILTER CHARACTERISTICS
The filter characteristics for each frequency band are shown in Figure 16 to Figure 20. These figures
show the frequency response for all available gain settings, using default cut-off/centre frequencies
and bandwidth.



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