AK4679EG Datasheet, PDF (114/220 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with DSP and MIC/RCV/HP/SPK/LINE-AMP

[AK4679]
■ Receiver-Amp (RCP/RCN pins)
Lch/Rch signal of DAC is output from the RCP/RCN pins which is BTL as (L+R) signal. The load impedance is 32Ω
(min). When the PMRCV bit = “0”, the mono receiver output enters power-down mode and the output is Hi-Z. When the
PMRCV bit = “1” and RCVPS bit = “1”, mono receiver output enters power-save mode. Pop noise at power-up/down can
be reduced by changing PMRCV bit when RCVPS bit = “1”. When PMRCV bit = “1” and RCVPS bit = “0”, mono
receiver output enters in normal operation. RCVG3-0 bits control the volume of mono receiver output.
DAC Lch
DACRL bit
RCVG3-0 bits
RCP pin
DAC Rch
M
I
X
DACRR bit
RCN pin
Figure 82. Mono Receiver Output
RCVG3-0 bits Attenuation
FH
+12dB
EH
+9dB
DH
+6dB
CH
+3dB
BH
0dB
(default)
AH
−3dB
9H
−6dB
8H
−9dB
7H
−12dB
6H
−15dB
5H
−18dB
4H
−21dB
3H
−24dB
2H
−27dB
1H
−30dB
0H
MUTE
Table 104. Mono Receiver Output Volume Setting
PMRCV bit
0
1
RCVPS bit
Mode
RCP pin
RCN pin
x
Power-down
Hi-Z
Hi-Z
1
Power-save
Hi-Z
Common Voltage
(typ. 0.8 x AVDD)
0
Normal Operation Normal Operation Normal Operation
Table 105. Receiver-Amp Mode Setting (x: Don’t care)
(default)
MS1402-E-06
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2013/02