AK5371A Datasheet, PDF (6/32 Pages) Asahi Kasei Microsystems – 2ch A/D Converter with USB I/F

ASAHI KASEI
[AK5371A]
Analog Characteristics
Ta=25°C,VA=VD=3.3V, Signal Frequency=1kHz, Sampling Frequency Fs=44.1kHz BW=20Hz – 20kHz, Test Mode; unless
otherwise specified
Parameter
Min
typ
Max
Units
Stereo ADC (2 channel)
Resolution
16
bits
S/N (A weight)
(AMPR2I/AMPL2I input)
84
dBA
(IPGA are set to 0dB)
USB Normal Mode
S/(N+D)
(-1dB analog input)
70
dB
(IPGA are set to 0dB)
USB Normal Mode
MIC Amplifier (2^nd Stage) <IPGA> Characteristics
Full Scale Input Voltage
1.5
1.7
1.9
Vp-p
Gain Control Range
-31
+24
dB
Step Size
0
1.0
2.0
dB
Input Impedance @AMPR2I/AMPL2I pin
40
KΩ
MIC Amplifier (1^st Stage)
Gain range
+20
dB
Input Impedance @MICR/MICL
10
20
KΩ
S/N (A weight) @MICR/MICL to AMPR1O/AMPL1O
77
dBA
MIC Bias (VA)
Output Voltage
when 4.7KΩ resistor connected
2.0
Vdc
Output Impedance
200
500
Ω
Output Current
2
mA
MIC Bias (Buffer Amp)
Output Voltage
when 300Ω resistor connected
1.9
2.2
2.5
Vdc
Output Current
2
mA
Power Supplies
Analog
17
25
mA
Digital
9
15
mA
Total
26
40
mA
Power Down (Suspend Mode)
0
160
uA
FILTER CHARACTERISTICS
(Ta=25°C VA, VD =3.0 - 3.6 V ; fs = 44.1 kHz)
Parameter
Symbol
A/D Digital Filter
(Decimation LPF)
Passband
+/- 0.2 dB PB
Stopband
SB
Passband Ripple
PR
Stopband Attenuation
SA
Group Delay
GD
A/Ddigital Filter (HPF)
Frequency Response
-3 dB
FR
-0.5 dB
-0.1 dB
Min typ
0
26.5
68
6.85
19.2
44.9
Max
Units
17.64
+/- 0.2
0.5
KHz
KHz
dB
dB
ms
Hz
Hz
Hz
MS0546-E-00
MS0103-E-00
6
2007/02