WM8986GECO/V Wolfson Microelectronics, WM8986GECO/V Datasheet - Page 82

• Manufacturer Part Number: WM8986GECO/V
• Description: Audio Amplifiers Class D Headphone DAC + Line Out
• Manufacturer: Wolfson Microelectronics

Specifications of WM8986GECO/V

• Product: Class-D
• Output Power: 40 mW
• Thd Plus Noise: - 86 dB
• Operating Supply Voltage: 1.71 V to 3.6 V, 2.5 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Audio Load Resistance: 16 Ohms
• Minimum Operating Temperature: - 40 C
• Output Signal Type: Differential
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 1.71 V, 2.5 V
• Output Type: Differential
• Package / Case: QFN-28
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8986
5-BAND EQUALISER
Figure 40 EQ Band 1 Low Frequency Shelf Filter Cut-offs
Figure 42 EQ Band 2 – Peak Filter Centre Frequencies,
Figure 44 EQ Band 2 – EQ2BW=0, EQ2BW=1
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Frequency (Hz)
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The WM8986 has a 5-band equaliser which can be applied to either the ADC path or the DAC path.
The plots from Figure 40 to Figure 53 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 41 EQ Band 1 Gains for Lowest Cut-off Frequency
Figure 43
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EQ Band 2 – Peak Filter Gains for Lowest Cut-off
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PD, Rev 4.1, June 2009
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Production Data
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