AK4533 Datasheet, PDF (16/40 Pages) Asahi Kasei Microsystems – Audio Codec with Touch Screen Controller

[ASAHI KASEI]
Figure 9 shows audio codec block diagram
MICOUT
AIN
Audio Block Diagram
AFILT
MICIN
LOUT
ROUT
20dB fixed
AMP
CTF &
Out Buff
CTF &
Out Buff
-8dB to 27.5dB
AGC
4th order
Σ ∆ modulator
(64 times oversampling)
1/64 times 4th order
decimation digital filter
fs
128fs/
8fs
1bit SC DAC
256fs
& 2nd order
1bit SC DAC
Digital Σ ∆ modulator
4th order,
8 times interpolation
digital filter(LPF type)
Digital ATT
0 to 22.5dB
fs
16bit
128/256 time oversampling
2ch
& 2nd order
fs
Figure 9. Audio Codec Block Diagram
<Revision 0.9a>
15
July 00