ak4552 AKM Semiconductor, Inc., ak4552 Datasheet - Page 10

• Manufacturer Part Number: ak4552
• Description: 3v 96khz 24bit ?? Codec
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
Data is shifted in/out the SDTI/SDTO pins using BCLK and LRCK inputs. The data is MSB first, 2’s compliment.
The DAC of AK4552 includes the digital de-emphasis filter (tc=50/15 s) by IIR filter. This filter corresponds to three
frequencies (32kHz, 44.1kHz, 48kHz). The de-emphasis filter selected by DEM0 and DEM1 is enabled for input audio
data. The de-emphasis is also disabled at DEM0=“1” and DEM1=“0”.
The AK4552 has a Digital High Pass Filter (HPF) for DC-offset cancel. The cut-off frequency of the HPF is 3.4Hz at
fs=44.1kHz and the frequency response at 20Hz is -0.12dB. It also scales with the sampling frequency (fs).
MS0055-E-01
LRCK
BCLK(64fs)
SDTO(o)
SDTI(i)
Audio Serial Interface Format
De-emphasis Filter
Digital High Pass Filter
0
23:MSB, 0:LSB
23
Don’t Care
1
22
2
16 15 14
8
23
Lch Data
9
22
10
DEM1
Table 3. De-emphasis filter control
Figure 5. Audio Data I/F Timing
0
0
1
1
12 11
0
24
21
DEM0
- 10 -
1
0
1
0
1
31
0
0
23 22
Don’t Care
1
44.1kHz
48kHz
32kHz
Mode
2
OFF
16 15 14
8
23
Rch Data
9
22
10
12 11
0
24
21
1
31
[AK4552]
0
2001/02
0
23
1