WM8985GEFL Wolfson Microelectronics, WM8985GEFL Datasheet - Page 115

• Manufacturer Part Number: WM8985GEFL
• Description: Audio CODECs Multimedia CODEC with Class D HP
• Manufacturer: Wolfson Microelectronics

Specifications of WM8985GEFL

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Production Data
5-BAND EQUALISER
Figure 51 EQ Band 1 Low Frequency Shelf Filter Cut-offs
Figure 53 EQ Band 2 – Peak Filter Centre Frequencies,
Figure 55 EQ Band 2 – EQ2BW=0, EQ2BW=1
w
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Frequency (Hz)
Frequency (Hz)
Frequency (Hz)
The WM8985 has a 5-band equaliser which can be applied to either the ADC path or the DAC path.
The plots from Figure 51 to Figure 64 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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Figure 52 EQ Band 1 Gains for Lowest Cut-off Frequency
Figure 54
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EQ Band 2 – Peak Filter Gains for Lowest Cut-off
Frequency, EQ2BW=0
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Frequency (Hz)
Frequency (Hz)
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PD, Rev 4.6, July 2009
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WM8985
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