AK4650 Datasheet, PDF (11/86 Pages) Asahi Kasei Microsystems – 16Bit ΔΣ CODEC with MIC/HP/SPK-AMP & TSC

[AK4650]
ANALOG CHARACTERISTICS (Audio Block)
(Ta=25°C; AVDD, DVDD, HVDD, TSVDD=3.3V; AVSS=DVSS=HVSS=TSVSS=0V; fs=48kHz; Signal
Frequency=1kHz; 16bit Data; Measurement frequency=20Hz ∼ 20kHz; unless otherwise specified)
Parameter
min
typ
max
Units
MIC Amplifier: INT, EXT pins, MDIF bit = “0” (Single-ended input)
Input Resistance
20
30
40
kΩ
Gain
MGAIN bit = “0”
-
0
-
dB
MGAIN bit = “1”
-
+20
-
dB
MIC Amplifier: MIC+, MIC− pins, MDIF bit = “1” (Full-differential input), MGAIN bit = “1” (+20dB)
Maximum Input Voltage (Note 10)
-
0.099
-
Vpp
MIC Power Supply: MPI, MPE pins
Output Voltage
1.98
2.2
2.42
V
Load Resistance
2
-
-
kΩ
Load Capacitance
-
-
30
pF
Mic Detection: MDT pin
Comparator Voltage Level
0.15
0.20
0.23
V
Internal pull down Resistance
250
500
750
kΩ
Input PGA Characteristics: AIN pin
Input Resistance (Note 11)
5
10
15
kΩ
Step Size
0.1
0.5
0.9
dB
Gain Control Range (ALC1 bit = “0”)
max: IPGA6-0 bits = “3FH”
-
+27.5
-
dB
min: IPGA6-0 bits = “00H”
-
−8
-
dB
ADC Analog Input Characteristics: MIC Gain=+20dB, IPGA=0dB, ALC1=OFF, MIC (Single) → IPGA → ADC
Resolution
-
-
16
Bits
Input Voltage (Note 12)
0.168
0.198
0.228
Vpp
S/(N+D) (−1dBFS)
71
79
-
dB
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, MOGN2-0 bits = +6dB
Output Voltage (Note 13)
3.56
3.96
4.36
Vpp
S/(N+D) (−3dBFS)
75
85
-
dB
S/N
(A-weighted)
85
95
-
dB
Load Resistance
20
-
-
kΩ
Load Capacitance
-
-
30
pF
Step Size
2
3
4
dB
Gain Control Range
max: MOGN2-0 bits = “111”
-
+6
-
dB
min: MOGN2-0 bits = “000”
-
−15
-
dB
Note 10. Maximum input voltage of MIC+ and MIC− pins are proportional to AVDD voltage. Vin = 0.03 x AVDD(typ).
Note 11. When IPGA Gain is changed, this typical value changes between 8kΩ and 11kΩ.
Note 12. Input voltage is proportional to AVDD voltage. Vin = 0.06 x AVDD.
Note 13. Output voltage is proportional to AVDD voltage. Vout = 1.2 x AVDD(typ)@MOGN2-0 bits = “111” at
full-differential output. Vout = 0.6 x AVDD(typ)@MOGN2-0 bits = “111” at single-ended Output.
MS0502-E-01
- 11 -
2007/04