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DA7211 Datasheet(PDF) 32 Page - Dialog Semiconductor

Part # DA7211
Description  Ultra-low power stereo codec
PDF  105 Pages
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Manufacturer  DIALOG [Dialog Semiconductor]
Direct Link  http://www.dialog-semiconductor.com/
Logo DIALOG - Dialog Semiconductor

DA7211 Datasheet(HTML) 32 Page - Dialog Semiconductor

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DA7211
Ultra-low power stereo codec
Company confidential
Datasheet
Revision 3e
15-Oct-2015
CFR0011-120-00 Rev 5
32 of 105
© 2015 Dialog Semiconductor
Examples for ALC_ATT (address 0x86, Table 168).
(fs=44.1 kHz; sample period = 22.67 µs)
Setting
ms per 1 dB step
11111111 (FF)
23.2
10111111 (BF)
17.4
01111111 (7F)
11.6
00111111 (3F)
5.8
00011111 (1F)
2.9
00001111 (0F)
1.5
00000100 (04)
0.5
Examples for ALC_REL (address 0x87,Table 169).
(fs=44.1 kHz; sample period = 22.67 µs)
Setting
ms per 1 dB step
11111111 (FF)
92.9
10111111 (BF)
69.7
01111111 (7F)
46.4
00111111 (3F)
23.2
00011111 (1F)
11.6
00001111 (0F)
5.8
00000100 (04)
0.5
8.1.6
Noise gate
A noise gate feature is provided to avoid ‘noise pumping’ where the gain of the channel is increased
to the maximum when there is no signal is present (i.e. only noise). If the level of the input signal
drops below the threshold configured inside control ALC_NOIS (address 0x85, Table 167) the
channel gain is held.
8.2
Output signal chain
8.2.1
Stereo audio DAC
The integrated stereo DAC is suitable for high quality audio playback of MP3 files and portable
multimedia files of all kinds. The DAC has individually enabled channels via controls DAC_L_EN and
DAC_R_EN (address 0x17, Table 59).
The DA7211 supports the option of individually phase inverted output signals using controls
DAC_L_INV (address 0x15, Table 57).and DAC_R_INV (address 0x16, Table 58).
A digital high pass filter for each DAC channel is implemented (configurable by control DAC_HPF_F0
(address 0x14, Table 56) that can be enabled via control DAC_HPF_EN (address 0x14, Table 56,
see blocks ‘DAC HP’ in Figure 15). After Reset, the high pass filters for both channels are enabled by
default.



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