[AK4679]
ANALOG CHARACTERISTICS (CODEC)
(Ta=25°C; AVDD=PVDD= DVDD=TVDDA= TVDDE=1.8V, SVDD=4.2V, VDDE=1.2V;
VSS1=VSS2=VSS3=VSS4 =VSS5 =0V; Signal Frequency=1kHz; 24bit Data; fs=44.1kHz, BICK=64fs; Measurement
Bandwidth=20Hz ∼ 20kHz; unless otherwise specified)
Parameter
min
typ
max
Unit
MIC Amplifier: LIN1/RIN1/LIN2/RIN2/LIN3/RIN3/LIN4/RIN4 pins
Input Resistance
17
25
38
kΩ
Gain (Note 10)
Gain Setting
Step Width
-
3
+24
-
dB
dB
−6
-
MIC Power Supply: MPWR1, MPWR2 pin
Output Voltage (Note 11)
Load Resistance
Load Capacitance
Output Noise Level (A-weighted)
PSRR (Note 12)
2.3
1.0
-
2.5
-
-
2.7
-
30
-
V
kΩ
pF
-
dBV
−107
217Hz
1kHz
-
-
100
100
-
-
dB
dB
Stereo ADC Analog Input Characteristics:
LIN1/RIN1/LIN2/RIN2/LIN3/RIN3/LIN4/RIN4 pins(Single-ended Input) → Stereo ADC → Programmable Filter
(IVOL=0dB, EQ=ALC=OFF) → SDTO
Resolution
-
-
0.227
1.8
80
80
87
92
87
92
90
24
0.250
1.98
-
-
-
-
-
-
-
-
0.8
0.8
Bits
Vpp
Vpp
dB
dB
dB
dB
dB
dB
dB
(Note 14)
(Note 15)
(Note 14)
(Note 15)
(Note 14)
(Note 15)
(Note 14)
(Note 15)
(Note 14)
(Note 15)
(Note 14)
(Note 15)
0.204
Input Voltage (Note 13)
1.62
69
-
76
-
76
-
75
-
S/(N+D) (−1dBFS)
D-Range (−60dBFS, A-weighted)
S/N (A-weighted)
Interchannel Isolation (Note 16)
Interchannel Gain Mismatch (Note 16)
100
0
0
dB
dB
dB
-
-
Note 10. In case of full-differential input, MGAIN (min)=-3dB
Note 11. In case of MICL1 bit or MICL2 bit = “0”. Output voltage is proportional to AVDD (typ. 1.39 x AVDD V).
MICL1 bit or MICL2 bit = “1”: typ. 1.56 x AVDD V
Note 12. PSRR is referred to SVDD with 500mVpp sine wave.
Note 13. Input voltage which means ADC full-scale voltage is proportional to AVDD voltage.
Single-ended Input: Vin = 1.0 x AVDD Vpp(typ).
Full-Differential Input: Vin = (IN+) – (IN–) = 1.0 x AVDD Vpp(typ).
IN+ = 0.5 x AVDD(typ), IN– = 0.5 x AVDD(typ)
Pseudo-Differential Input: Vin = (IN+) – (IN–) = 1.0 x AVDD Vpp (typ).
IN+ = 1.0 x AVDD(typ), IN– = 0V (IN– pin should be connected to VSS1.)
Note 14. MGNL3-0=MGNR3-0 bits = “BH” (+18dB).
In case of Full-differential, S/(N+D) =75dB, DR=S/N=81dB
Note 15. MGNL3-0=MGNR3-0 bits = “5H” (0dB).
In case of Full-differential, S/(N+D) =79dB, DR=S/N=91dB
Note 16. This is a value between Lch and Rch of each input.
MS1402-E-06
2013/02
- 14 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
