ASAHI KASEI
[AK4527B]
n
Digital Attenuator
AK4527B has channel-independent digital attenuator (256 levels, 0.5dB step). Attenuation level of each channel can be
set by each ATT7-0 bits (table 10).
ATT7-0
00H
01H
02H
:
Attenuation Level
0dB
Default
-0.5dB
-1.0dB
:
FDH
FEH
FFH
-126.5dB
-127.0dB
MUTE (-∞)
Table 10. Attenuation level of digital attenuator
The transition between set values is soft transition of 7425 levels. It takes 7424/fs (168ms@fs=44.1kHz) from 00H(0dB)
to FFH(MUTE). If PDN pin goes to “L”, the ATTs are initialized to 00H. The ATTs are 00H when RSTN = “0”. When
RSTN return to “1”, the ATTs fade to their current value. Digital attenuator is independent of soft mute function.
MS0056-E-00
2000/10
- 18 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
