AK4691 Datasheet, PDF (9/80 Pages) Asahi Kasei Microsystems – 4ch ADC + 2ch DAC with MIC/HP/SPK-AMP

[AK4691]
ANALOG CHARACTERISTICS
(Ta=25°C; AVDD=DVDD=MVDD=LVDD=SVDD=TVDD1=TVDD2=3.0V; VSS1=VSS2=VSS3=VSS4 = 0V;
fs=48kHz; Input Frequency =1kHz; Measurement width=20Hz ∼ 20kHz, unless otherwise specified)
Parameter
min
typ
max
Units
Pre-Amp Characteristics:
Input Resistance: Positive Input Pin (Note 15)
70
100
130
kΩ
Negative Input Pin (Note 16)
1.54
2.2
2.86
kΩ
Gain
PRG12-10 bits = “000”, FB bit = “1”
-0.8
0
+17.2
dB
PRG22-20 bits = “000”, FB bit = “1”
PRG12-10 bits = “001”, FB bit = “0”
+17.2
+18
+18.8
dB
PRG22-20 bits = “001”, FB bit = “0”
PRG12-10 bits = “010”, FB bit = “0”
+19.2
+20
+20.8
dB
PRG22-20 bits = “010”, FB bit = “0”
PRG12-10 bits = “011”, FB bit = “0”
+23.2
+24
+24.8
dB
PRG22-20 bits = “011”, FB bit = “0”
PRG12-10 bits = “100”, FB bit = “0”
+27.2
+28
+28.8
dB
PRG22-20 bits = “100”, FB bit = “0”
MIC Power Supply Voltage Characteristics: MPWR pin
Output Voltage (Output current = 0mA) (Note 17)
Maximum Output Current
1.7
1.9
2.1
V
-
-
4
mA
ADC Analog Input Characteristics: ALC = OFF
Resolution
-
-
16
bits
Input Resistance (LIN, RIN pins)
70
100
130
kΩ
Input Voltage (Note 18) (Note 19)
-4.5
-3.7
-2.9
dBV
(Note 18) (Note 20)
-57.9
-57.1
-56.3
dBV
S/(N+D) (-1dBFS) (Note 19)
75
85
-
dB
(Note 21)
72
82
-
dB
DR (-60dBFS, A-Weighted) (Note 19)
81
90
-
dB
(Note 20)
54
60
-
dB
S/N (A-Weighted) (Note 19)
81
90
-
dB
(Note 20)
54
60
-
dB
Interchannel Isolation (Note 19)
80
100
-
dB
(Note 20)
50
70
-
dB
Interchannel Gain Mismatch (Note 19)
-
-
0.5
dB
(Note 20)
-
-
0.5
dB
Note 15. INTL1/2, INTR1/2, EXTL1/2, EXTR1/2 pins
Note 16. PRELN1/2, PRERN1/2 pins. Gain=0dB, +20dB: 3.5kΩ ± 30%; Gain=+18dB: 4.4kΩ ± 30%, Gain=+24dB:
2.2kΩ ± 30%, Gain=+28dB: 1.4kΩ ± 30%
Note 17. When the output current is 0mA, the output voltage of MPWR pin is typically (MVDD – 1.1) V at MVDD=3.0V
and typically (MVDD-1.4) V at MVDD=4.5V.
When the output current is 4mA, the output voltage of MPWR pin is typically (MVDD – 1.3) V at MVDD=3.0V
and typically (MVDD-1.5) V at MVDD=4.5V.
Note 18. Input voltages are proportional to AVDD voltage.
LIN, RIN = typ. (0.62 x AVDD) Vpp
INTL1/2, INTR1/2, EXTL1/2, EXTR1/2 = typ. (0.0013 x AVDD) Vpp
Note 19. Input from LIN, RIN pins. FB = “1”, IVOL=0dB.
Note 20. Input from INTL1/2, INTR1/2, EXTL1/2 or EXTR1/2 pins. Pre-Amp Gain = + 24dB, PRE bit = “1”, FB bit =
“0”, IVOL = +29.625dB, MGL12-10 = MGR12-10 = MGL22-20 = MGR22-20 bits = “010” (0dB)
Note 21. Input from INTL1/2, INTR1/2, EXTL1/2 or EXTR1/2 pins. Pre-Amp Gain = + 24dB, PRE bit = “1”, FB bit =
“0”, IVOL = +0dB, MGL12-10 = MGR12-10 = MGL22-20 = MGR22-20 bits = “010” (0dB)
* 0dBV = 1Vrms = 2.83Vpp
MS0672-E-00
-9-
2007/11