WM8983GEFL/RV Wolfson Microelectronics, WM8983GEFL/RV Datasheet - Page 117

• Manufacturer Part Number: WM8983GEFL/RV
• Description: Audio CODECs Mbl Multimedia CODEC w/ 1W Speaker Driver
• Manufacturer: Wolfson Microelectronics

Specifications of WM8983GEFL/RV

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 25 C

Production Data
5-BAND EQUALISER
Figure 64 EQ Band 1 Low Frequency Shelf Filter Cut-offs
Figure 66 EQ Band 2 – Peak Filter Centre Frequencies,
Figure 68 EQ Band 2 – EQ2BW=0, EQ2BW=1
w
-10
-15
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-10
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-5
-5
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EQ2BW=0
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Frequency (Hz)
Frequency (Hz)
Frequency (Hz)
The WM8983 has a 5-band equaliser which can be applied to either the ADC path or the DAC path.
The plots from Figure 64 to Figure 77 show the frequency responses of each filter with a sampling
frequency of 48kHz, firstly showing the different cut-off/centre frequencies with a gain of ±12dB, and
secondly a sweep of the gain from -12dB to +12dB for the lowest cut-off/centre frequency of each
filter.
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2
1
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2
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Figure 65 EQ Band 1 Gains for Lowest Cut-off Frequency
Figure 67
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-1
Cut-off Frequency, EQ2BW=0
EQ Band 2 – Peak Filter Gains for Lowest
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1
1
Frequency (Hz)
Frequency (Hz)
10
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2
2
PD Rev 4.0 November 2006
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WM8983
10
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