TFA9812HN PHILIPS [NXP Semiconductors], TFA9812HN Datasheet - Page 19

• 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
In
example, in word2 bits [14:8] = [0111 010] represent k
Table 15.
Section 9.5.4
equalizer.
k
k
k
Word
word1
word1
word1
word2
word2
word2
word2
word2
1
2
Fig 6.
x
Equation
=
=
=
M 2
1
1
1 k
1 k
+
+
–
–
Transfer functions for several quality factors Q
–
Equalizer control word construction
k
k
E
1
2
8, M is the unsigned mantissa and E the negative signed exponent. For
1
2
M
shows the I
1
Section
15
[14:4]
[3:0]
15
[14:11]
[10:8]
[7:1]
0
t
t
t
t
1
1
2
2
=
=
Gain
=
=
(dB)
Rev. 02 — 22 January 2009
1
0
0
1
12
8
4
0
2
10
C address locations of the controls for various bands of the
1
Q1 = 0.27
Q2 = 0.61
Q3 = 1.65
10
Data
t
11 mantissa bits of k
Four exponent bits of k
t
Four mantissa bits of k
Three exponents bits of k
k
s
2
BTL stereo Class-D audio amplifier with I
1
2
0
10
3
10
Frequency (Hz)
2
4
' = (7/2
1
’
010aaa222
2
1
’
’
2
’
10
4
)
5
2
2
= 1.09375 10
© NXP B.V. 2009. All rights reserved.
TFA9812
2
S input
19 of 66
1
.
(7)
(8)