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DA7218 Datasheet(PDF) 49 Page - Renesas Technology Corp

Part # DA7218
Description  Ultra-Low Power Stereo Codec
PDF  154 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

DA7218 Datasheet(HTML) 49 Page - Renesas Technology Corp

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Ultra-Low Power Stereo Codec
R32DS0004EE0370 Revision 3.7
Aug 9, 2024
CFR0011-120-00
Page 49
Figure 19. Equalizer filter band 4 frequency response at FS = 48 kHz
Figure 20. Equalizer filter band 5 frequency response at FS = 48 kHz
9.3.5.4
5-Stage Biquad Filter
The stereo 5-stage biquad filter can be used to provide more flexible filtering of the output signal than can be
achieved using the 5-band equalizer. The biquad filters can be used for the implementation of low-pass, high-
pass or notch filters.
The 5-band EQ and the 5-band biquad filter can be used at the same time for greater filtering control.
The biquad filter is enabled using out_1_biq_5stage_filter_en and can be muted using
out_1_biq_5stage_mute_en. The user must also set VDD supply to 1.8 V and set register VDDDIG = Bypass
mode (1.8 V), when using the biquad filters.
The biquad filter on each channel can be selected independently using out_1l_biq_5stage_sel and
out_1r_biq_5stage_sel in the OUT_1L_FILTER_CTRL and OUT_1R_FILTER_CTRL registers.



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