ASAHI KASEI
AKM CONFIDENTIAL
[AK4561]
Parameter
ALC Characteristics (IPGA):
Maximum Input Voltage (Note 13)
Input Resistance:
MIC(MIC_IN_L,MIC_IN_R pins) (Note 14)
LINE(LIN, RIN pins) (Note 15)
Step Size
MIC
LINE
+0dB
∼
-36dB
+26dB
∼
-10dB
-36dB
∼
-44dB
-10dB
∼
-18dB
-44dB
∼
-56dB
-18dB
∼
-30dB
-56dB
∼
-68dB
-30dB
∼
-42dB
-68dB
∼
-80dB
-42dB
∼
-54dB
min
typ
max
-0.5
Units
dBV
kΩ
kΩ
dB
dB
dB
dB
dB
Bits
dBV
dB
dB
dB
dB
dB
Bits
dB
dB
dB
dBV
dB
dB
kΩ
pF
5.6
117
0.1
0.1
0.1
-
-
9
184
0.5
1
2
2
4
13
260
-
-
16
ADC Analog Input Characteristics:
Input from LIN/RIN, ALC = OFF, IPGA = 0dB
Resolution
Input Voltage (Note 16)
S/(N+D)(-0.5dBFS Output)
DR (-60dBFS Output, A-Weighted)
S/N (A-Weighted)
Interchannel Isolation
Interchannel Gain Mismatch
DAC Analog Characteristics:
Measured via LOUT1/ROUT1, VOL=+7.5dB
Resolution
S/(N+D) (0dBFS Input)
DR (-60dBFS Input, A-Weighted)
S/N (A-Weighted)
Output Voltage (Note 16)
Interchannel Isolation
Interchannel Gain Mismatch
Load Resistance
Load Capacitance (Note 17)
-5.5
78
86
86
80
0.5
16
76
88
88
+2
80
0.5
10
20
Analog Volume Characteristics (OPGA):
Input Resistance (OPGL,OPGR pins) (Note 18)
44
110
205
kΩ
Step Size: +0dB
∼
-16dB
0.1
1
dB
-16dB
∼
-38dB
0.1
2
dB
-38dB
∼
-50dB
-
4
-
dB
BEEP Input:
(BEEP pin)
Maximum Input Voltage (Note 16)
-5.5
dBV
Input Resistance
50
kΩ
Note 13. When the ALC operation is enabled, maximum input voltage becomes typically (VA – 0.1V) Vpp.
2.7Vpp = -0.5dBV @VA=2.8V
Note 14. Input resistance of MIC changes from 8kΩ to 10kΩ by setting GAIN value, typically.
Note 15. Input resistance of LINE changes from 168kΩ to 200kΩ by setting GAIN value, typically.
Note 16. Input/Output voltage is proportional to VA voltage. 0.54 x VA.
Note 17. When output pin drives some capacitive load, some resistor should be added in series between output pin and
capacitive load.
Note 18. Input resistance of OPGA changes from 63kΩ to 158kΩ by setting GAIN value, typically.
Rev. 0.9
-8-
2000/09
AKM [ ASAHI KASEI MICROSYSTEMS ]
