ak5365 AKM Semiconductor, Inc., ak5365 Datasheet - Page 26

• Manufacturer Part Number: ak5365
• Description: 24-bit 96khz ?? Adc With Selector/pga/alc
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
[5] IPGA value before and after ALC operation
Soft mute operation is performed in the digital domain of the ADC output.
Soft mute can be controlled by SMUTE bit or SMUTE pin. The SMUTE bit and SMUTE pin are ORed between pin and
register. When SMUTE bit goes “1” or SMUTE pin goes “H”, the ADC output data is attenuated by
cycles. When the SMUTE bit returned “0” or SMUTE pin goes “L” the mute is cancelled and the output attenuation
gradually changes to IPGA value within 1024 LRCK cycles. If the soft mute is cancelled before mute state after starting of
the operation, the attenuation is discontinued and returned to IPGA value.
Soft mute function and digital volume are common.
MS0164-E-01
S M U T E
Attenuation
S D T O
Soft Mute Operation
[Operation Example 1]
[Operation Example 2]
(1) The output signal is attenuated by
(2) Digital output delay from the analog input is called the group delay (GD).
(3) If the soft mute is cancelled before the mute, the attenuation is discontinued and returned to IPGA value.
1. Set IPGA = +12dB at ALC=OFF. DATT portion is set to 0dB internally.
2. ALC=ON after soft mute is enabled.
3. Disable the soft mute.
4. During ALC operation. The IPGA changes from 9.5dB to the value set by REF7-0 bits.
5. ALC=OFF after soft mute is enabled.
6. Disable the soft mute. The IPGA return to +12dB automatically.
1. Set IPGA = +12dB at ALC=OFF. DATT portion is set to 0dB internally.
2. ALC=ON after soft mute is enabled.
3. Disable the soft mute.
4. During ALC operation. When the DATT portion is set to 10dB, the IPGA changes from 19.5dB to the value set
5. ALC=OFF after soft mute is enabled.
6. Disable the soft mute. The IPGA setting is 10dB.
by REF7-0 bits.
DATT Level
-
within 1024 LRCK cycles (1024/fs).
(1)
Figure 13. Soft Mute Function
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G D
(2)
G D
within 1024 LRCK
(3)
[AK5365
2002/08
]