AK5730 Datasheet, PDF (8/50 Pages) Asahi Kasei Microsystems – 4-Channel Differential Audio ADC for Line & Mic Inputs

[AK5730]
ANALOG CHARACTERISTICS
(Ta=25°C; AVDD=DVDD =3.3V; VSS1=VSS2=VSS3=0V; MCKI=512fs, fs=48kHz, BCLK=64fs; Signal
Frequency=1kHz; 24bit Data; Measurement frequency=20Hz ∼ 20kHz; unless otherwise specified; GAIN bit = “0”)
Parameter
min
typ
max
Unit
ADC Analog Characteristics (AC):
Resolution
-
-
24
Bits
Differential, Note 5
1.55
1.65
1.75
Vrms
Input Voltage Single-ended, Note 6
0.77
0.82
0.87
Vrms
Gain mode, Note 7
0.51
0.55
0.59
Vrms
Input Impedance
1.0
1.4
MΩ
−0.5dBFS Differential
86
92
-
dB
S/(N+D)
−0.5dBFS Single-ended
86
92
-
dB
−0.5dBFS Gain mode
86
92
−60dBFS, A-weighted Differential
93
100
-
dB
Dynamic Range −60dBFS, A-weighted Single-ended
92
99
-
dB
−60dBFS, A-weighted Gain mode
92
98
A-weighted Differential
93
100
-
dB
S/N
A-weighted Single-ended
92
99
-
dB
10mVrms input, A-weighted Gain mode
57
63
-
dB
Interchannel Isolation
90
100
-
dB
Interchannel Gain Mismatch
0
0.3
dB
1kHz, Differential. Note 8
70
85
dB
20kHz, Differential. Note 8
70
85
dB
CMRR
1kHz, Single-ended, Note 8
20kHz, Single-ended, Note 8
65
80
55
65
dB
dB
1kHz, Gain mode, Note 9
65
80
dB
20kHz, Gain mode, Note 9
65
80
dB
PSRR (1kHz, Note 10)
50
dB
MIC Power Supply:
MBS3-0 bits= “0000”
4.90
5
5.10
V
MBS3-0 bits= “0001”
5.39
5.5
5.61
V
MBS3-0 bits= “0010”
5.88
6
6.12
V
Output DC Voltage
(Note 11)
MBS3-0 bits= “0011”
MBS3-0 bits= “0100”
MBS3-0 bits= “0101”
6.37
6.5
6.63
V
6.86
7
7.14
V
7.35
7.5
7.65
V
MBS3-0 bits= “0110”
7.84
8
8.16
V
MBS3-0 bits= “0111”
8.33
8.5
8.67
V
MBS3-0 bits= “1000”
8.78
9
9.22
V
Microphone Current (for 4 channels)
0.1
40
mA
Output Noise Level (A-weighted)
-100
-94
dBV
SAR ADC Characteristics (DC):
Resolution
-
-
12
Bits
Input Voltage (Note 12)
3.2
3.3
3.4
V
Integral Nonlinearity (INL) Error
-4
+5
LSB
Differential Nonlinearity (DNL) Error
-2
+2
LSB
Note 5. The voltage difference between IN*P and IN*N pins. Input Voltage should be adjusted with external resistors.
Input voltage is proportional to AVDD voltage. Vin = 0.5 × AVDD Vrms (typ). Full scale: -0.034dB
Note 6. Single-ended IN*P pin, IN*N pin must be connected to signal common. Input Voltage should be adjusted with
external resistors. When STD* bit = “1”, Input voltage is proportional to AVDD voltage.
Vin = 0.25 × AVDD Vrms (typ). Full scale: -0.034dB
Note 7. The voltage difference between IN*P and IN*N pins. Input Voltage should be adjusted with external resistors.
When GAIN* bit = “1”, Input Voltage = 0.55Vrms = 0.167 × AVDD Vrms (typ). Full scale: -0.034dB
Note 8. The 1kHz, 1.0Vpp signal is applied to IN*N and IN*P with same phase.
The CMRR is measured as the attenuation level from 0dB = -7.5dBFS(since the normal 1Vpp= -7.5dBFS).
Note 9. The 1kHz, 0.5Vpp signal is applied to IN+. IN- pin must be connected to be signal common.
The CMRR is measured as the attenuation level from 0dB = -4dBFS(since the normal 1Vpp=-4dBFS).
Rev 0.8
2013/06
-8-