AK4640_05 Datasheet, PDF (11/78 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4640]
ANALOG CHARACTERISTICS
(Ta=25°C; AVDD, DVDD, PVDD, HVDD=3.3V; AVSS=DVSS=PVSS=HVSS=0V; fs=44.1kHz, BICK=64fs;
Signal Frequency=1kHz; 16bit Data; Measurement frequency=20Hz ∼ 20kHz; unless otherwise specified)
Parameter
min
typ
max
Units
MIC Amplifier:
Input Resistance
20
30
40
kΩ
Gain
(MGAIN bit = “0”)
(MGAIN bit = “1”)
-
0
-
dB
-
20
-
dB
MIC Power Supply:
Output Voltage (Note 4)
2.22
2.47
2.72
V
Load Resistance
2
-
-
kΩ
Load Capacitance
-
-
30
pF
Input PGA Characteristics:
Input Resistance (Note 5)
5
10
15
kΩ
Step Size
0.1
0.5
0.9
dB
Gain Control Range
−8
-
+27.5
dB
ADC Analog Input Characteristics: MIC Gain=20dB, IPGA=0dB, ALC1=OFF, MIC → IPGA → ADC
Resolution
-
-
16
Bits
Input Voltage (Note 6)
0.168
0.198
0.228
Vpp
S/(N+D)
(−1dBFS)
71
79
-
dBFS
D-Range
(−60dBFS, A-weighted)
75
83
-
dB
S/N
(A-weighted)
75
83
-
dB
DAC Characteristics:
Resolution
-
-
16
Bits
Mono Line Output Characteristics: R_L=20kΩ, DAC → MOUT+/MOUT− pins
Output Voltage
MOGN bit = “1”, −17dB
-
0.31
-
Vpp
(Note 7)
MOGN bit = “0”, +6dB
3.56
3.96
4.36
Vpp
S/(N+D) (-3dBFS) MOGN bit = “1”, −17dB
-
76
dBFS
MOGN bit = “0”, +6dB
79
89
dBFS
S/N (A-weighted) MOGN bit = “1”, −17dB
-
79
dB
MOGN bit = “0”, +6dB
85
95
dB
Load Resistance
MOGN bit = “1”, −17dB
2
kΩ
MOGN bit = “0”, +6dB
20
kΩ
Load Capacitance
30
pF
Note 4. Output voltage is proportional to AVDD voltage. Vout = 0.75 x AVDD(typ).
Note 5. When IPGA Gain is changed, this typical value changes between 8kΩ and 11kΩ.
Note 6. Input voltage is proportional to AVDD voltage. Vin = 0.06 x AVDD(typ).
Note 7. Output voltage is proportional to AVDD voltage. Vout = 1.2 x AVDD(typ)@MOGN bit = “0” at Full-differential
output. Vout = 0.6 x AVDD(typ)@MOGN bit = “0” at Single-end Output.
MS0273-E-02
- 11 -
2005/04