tfa9879hn NXP Semiconductors, tfa9879hn Datasheet - Page 16

• Manufacturer Part Number: tfa9879hn
• Description: Mono Btl Class-d Audio Amplifier For Portable Applications With Digital Input
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TFA9879_1
Preliminary data sheet
9.2.6 Bass and treble control
The TFA9879 contains first order shelving filters for bass and treble control. The device
can attenuate or boost the bass and high frequency signals independently in 2 dB steps
within a 18 dB to +18 dB range. Attenuation and boosting are dependent on the audio
signal zero crossing settings (see
corner frequencies are adjustable.
The bass and treble corner frequencies, as a function of the I
sample rate, are given in
Table 9.
[1]
[2]
[3]
Control value
00
01
10
11
Fig 9.
[3]
Value selected via bits F_BASS in the Bass and treble control register (see
Value selected via bits F_TREBLE in the Bass and treble control register (see
Default value.
(dB)
G
-12
12
Transfer functions for selected values of G, the gain factor
-6
6
0
Corner frequency settings for bass and treble control
10
All information provided in this document is subject to legal disclaimers.
f
8, 16, 32, 64
11.025, 22.05, 44.1, 88.2
12, 24, 48, 96
8, 16, 32, 64
11.025, 22.05, 44.1, 88.2
12, 24, 48, 96
8, 16, 32, 64
11.025, 22.05, 44.1, 88.2
12, 24, 48, 96
reserved
s
Rev. 01 — 8 April 2010
(kHz)
Table
10
2
9.
Section 9.2.9
Mono BTL class-D audio amplifier with digital input
10
3
for further details). The bass and treble
Corner frequency (Hz)
Bass
181
250
272
218
300
326
300
413
450
10
[1]
2
4
C control settings and the
Table
Table
f (Hz)
29).
010aaa224
TFA9879
Treble
1090
1500
1630
2180
3000
3260
3000
4130
4500
© NXP B.V. 2010. All rights reserved.
29).
10
[2]
5
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