ak4644 AKM Semiconductor, Inc., ak4644 Datasheet - Page 7

• Manufacturer Part Number: ak4644
• Description: Stereo Codec With Mic/hp/rcv-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
(Ta=25°C; AVDD, DVDD, HVDD=3.3V; AVSS=DVSS=HVSS=0V; fs=44.1kHz, BICK=64fs;
Parameter
MIC Amplifier: LIN1/RIN1/LIN2/RIN2 pins & LIN3/RIN3 pins (AIN3 bit = “1”);
Input
Resistance
Gain
MIC Amplifier: IN1+/IN1−/IN2+/IN2− pins; MDIF1 = MDIF2 bits = “1” (Full-differential input)
Maximum Input Voltage (Note 8)
MIC Power Supply: MPWR pin
Output Voltage (Note 9)
Load Resistance
Load Capacitance
ADC Analog Input Characteristics: LIN1/RIN1/LIN2/RIN2 pins & LIN3/RIN3 pins (AIN3 bit = “1”)
Resolution
Input Voltage (Note 10)
S/(N+D)
(−1dBFS)
D-Range (−60dBFS, A-weighted)
S/N (A-weighted)
Interchannel Isolation
Interchannel Gain Mismatch
Note 8. The voltage difference between IN1/2+ and IN1/2− pins. AC coupling capacitor should be inserted in series at
Note 9. Output voltage is proportional to AVDD voltage. Vout = 0.75 x AVDD (typ)
Note 10. Input voltage is proportional to AVDD voltage. Vin = 0.06 x AVDD (typ)@MGAIN1-0 bits = “01” (+20dB),
Note 11. MGAIN1-0 bits = “01” (+20dB)
Note 12. MGAIN1-0 bits = “00” (0dB)
MS0477-E-01
Signal Frequency=1kHz; 16bit Data; Measurement frequency=20Hz ∼ 20kHz; unless otherwise specified)
each input pin. Full-differential mic input is not available at MGAIN1-0 bits = “00”. Maximum input voltage of
IN1+, IN1−, IN2+ and IN2− pins is proportional to AVDD voltage, respectively.
Vin = 0.069 x AVDD (max)@MGAIN1-0 bits = “01”, 0.035 x AVDD (max)@MGAIN1-0 bits = “10”, 0.017 x
AVDD (max)@MGAIN1-0 bits = “11”.
When the signal larger than above value is input to IN1+, IN1−, IN2+ or IN2− pin, ADC does not operate
normally.
Vin = 0.6 x AVDD(typ)@MGAIN1-0 bits = “00” (0dB)
MGAIN1-0 bits = “00”
MGAIN1-0 bits = “01”, “10”or “11”
MGAIN1-0 bits = “00”
MGAIN1-0 bits = “01”
MGAIN1-0 bits = “10”
MGAIN1-0 bits = “11”
MGAIN1-0 bits = “01”
MGAIN1-0 bits = “10”
MGAIN1-0 bits = “11”
(Note 11, LIN1/RIN1/LIN2/RIN2)
(Note 11, LIN3/RIN3)
(Note 12, LIN1/RIN1/LIN2/RIN2)
(Note 12, LIN3/RIN3)
MDIF1=MDIF2 bits = “0” (Single-ended inputs)
→ ADC → IVOL, IVOL=0dB, ALC=OFF
ANALOG CHARACTERISTICS
(Note 11)
(Note 12)
(Note 11)
(Note 12)
(Note 11)
(Note 12)
(Note 11)
(Note 12)
(Note 11)
(Note 12)
- 7 -
0.168
2.22
1.68
min
0.5
40
20
71
76
76
75
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.198
2.47
1.98
+20
+26
+32
100
typ
0.1
0.1
60
30
83
83
88
72
86
95
86
95
90
0
-
-
-
-
-
-
0.228
0.114
0.057
0.228
max
2.72
2.28
0.8
0.8
80
40
30
16
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[AK4644]
2006/10
dBFS
dBFS
dBFS
dBFS
Units
Vpp
Vpp
Vpp
Vpp
Vpp
Bits
kΩ
kΩ
kΩ
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
pF
V