TFA9812HN PHILIPS [NXP Semiconductors], TFA9812HN Datasheet - Page 20

• Manufacturer Part Number: TFA9812HN
• Description: BTL stereo Class-D audio amplifier with I2S input
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
TFA9812_2
Preliminary data sheet
8.5.2 Digital volume control
In I
control mode the volume control of both channels is common and the volume control
setting depends on the supply voltage on the pin AVOL (32).
8-bit volume control is available per channel. This is dB-linear down to 124 dB in steps of
0.5 dB. The last step of the volume control is mute.
Table 16
Fig 7.
Fig 8.
2
C control mode both audio channels have separate digital volume control. In Legacy
Gain
Gain
(dB)
(dB)
-12
shows the various settings and their related channel suppression:
12
Transfer functions for several center frequencies f
12
Transfer functions for several gain factors G
-6
8
4
0
6
0
10
10
1
1
Rev. 02 — 22 January 2009
10
10
2
2
BTL stereo Class-D audio amplifier with I
10
10
3
3
c
10
10
4
4
Frequency (Hz)
Frequency (Hz)
010aaa223
010aaa224
© NXP B.V. 2009. All rights reserved.
TFA9812
10
10
5
5
2
S input
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