I
[AK4220]
ANALOG CHARACTERISTICS (AUDIO)
(Ta=25°C; AVDD = VVDD1-2 = 5V, DVDD =3.3V; AVSS = VVSS1-3 = DVSS = 0V; Signal Frequency=1kHz,
Measurement Frequency=20Hz∼20kHz, unless otherwise specified)
Parameter
S/(N+D)
min
82
88
88
20
1
typ
92
96
96
max
Units
dB
dB
dB
kΩ
Vrms
dB
dB
dB
ppm/°C
kΩ
pF
pF
dB
Input=0dBV
DR (0dBV)
S/N (0dBV)
Input Impedance
Maximum Input Voltage
Gain
Interchannel Isolation
Interchannel Gain Mismatch
Gain Drift
Input=-60dBV, A-weighted
Input=0ff, A-weighted
(Note: 5)
(Note: 6)
-
0
100
0.2
20
-
0.5
-0.5
-
(Note: 7)
-
-
Load Resistance
Load Capacitance
(Note: 8) R1+R2 (Figure 4)
5
-
C1
C2
(Figure 4)
(Figure 4)
400
30
Power Supply Rejection
Input Detection Circuit
Input Reception
(Note: 9)
50
1kHz (Note: 10)
-43
-
-31
3
-26
-
dBV
dB
Input Reception Adjustment Gain Step (Note: 11)
Note: 5. Connected GND1-7 to GND using a capacitor for AC-coupling.
Note: 6. The Input Voltage meets S/(N+D)>82dB
Note: 7. Between all channels of LIN1-7 and RIN1-7.
Note: 8. The output resistance of audio output (LOUT1-3 and ROUT1-3) are less than l0Ω(typ).
Note: 9. Applied to AVDD, VVDD1-2 and DVDD with a sine wave (1kHz, 50mVpp).
Note: 10. Detect an instant value. 31dBV=+40mV0p. If the input voltage is smaller than the detection reception value, the
signal isn’t detected, and if the input voltage is larger than the detection reception value, the signal is detected.
The input reception value is proportional to AVDD voltage as of 0.008 x AVDD V0p(typ).
Note: 11. Input Reception Adjustment Gain is +6dB∼-6dB.
R1
C3
300Ω
10uF
LOUT1-3
ROUT1-3
R2
4.7kΩ
C21
C22
C1
C2=C21+C22= 30pF(max)
C1= 400pF(max)
Figure 4. Load Resistance R1, R2 and Load Capacitance C1, C2.
MS0627-E-00
2007/05
- 8 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
