ak4126 AKM Semiconductor, Inc., ak4126 Datasheet - Page 18

• Manufacturer Part Number: ak4126
• Description: 6ch 192khz / 24-bit Asynchronous Src
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
2. Semi-Auto mode
The soft mute is cancelled automatically by the setting of PLL2-0 pins (refer to Table 2), after the AK4126 detects the
rising edge (PDN pin = “L” → “H”) and the mute is continued during 4410/fso=100ms@fso=44.1kHz. After PDN pin =
“L” → “H” and when SMUTE pin is “H”, the mute is not cancelled.
Note: SDTO shows SDTO1, SDTO2 and SDTO3.
(1) The output data is attenuated by −∞ during the soft mute cycle (See Table 6)
The AK4126 includes the dither circuit. The dither circuit adds the dither to the LSB of all the output data set with the
OBIT1-0 pins by DITHER pin = “H”.
The AK4126 includes a digital de-emphasis filter (tc = 50/15µs) via an IIR filter. This filter corresponds to three
frequencies (32kHz, 44.1kHz and 48kHz). This setting is done via DEM1-0 pins (See Table 7), and it is applied to all input
data.
MS0544-E-00
Dither
De-emphasis Filter
SM U T E pin
PD N pin
Attenuation
SD T O
0dB
-∞
Figure 11. Soft Mute Function (Semi-Auto Mode)
DEM1pin
Table 7. De-emphasis Filter Setting
H
H
L
L
“L”
D on’t care
DEM0 pin
- 18 -
4410/fso
H
L
H
L
44.1kHz
48kHz
32kHz
Mode
OFF
(1)
“L”
[AK4126]
2006/09