AK5354_04 Datasheet, PDF (4/19 Pages) Asahi Kasei Microsystems – Low Power 20bit ΔΣ ADC with PGA

ASAHI KASEI
[AK5354]
ANALOG CHARACTERISTICS
(Ta=25°C; VA, VD=2.5V; fs=44.1kHz; Signal Frequency=1kHz; Measurement frequency=10Hz ∼ 20kHz;
unless otherwise specified)
Parameter
min
typ
max
Resolution
20
Input PGA Characteristics (IPGA):
Input Voltage (LIN1, LIN2, RIN1, RIN2) (Note 2)
1.35
1.5
1.65
Input Impedance
Step Width
+28dB ∼ -8dB
-8dB ∼ -16dB
-16dB ∼ -32dB
-32dB ∼ -40dB
-40dB ∼ -52dB
6.3
9
15
0.1
0.5
1
0.1
1
2
0.1
2
4
-
2
-
-
4
-
ADC Analog Input Characteristics: (Note 3)
S/(N+D)
(-0.5dBFS Input)
D-Range
(EIAJ)
S/N
(EIAJ)
Interchannel Isolation
Interchannel Gain Mismatch
74
84
82
89
82
89
90
100
0.2
0.5
Power Supplies
Power Supply Current: VA+VD
Normal Operation (PDN=“H”)
IPGA+AD (PM0=1, PM1=1)
7
10
Power Down (PDN=“L”)
(Note 4)
10
100
Units
bits
Vpp
kΩ
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
mA
µA
Note: 2. Analog input voltage (full-scale voltage: IPGA = 0dB) scale with VREF. (IPGA = ADC = 0.6 x VREF)
Note: 3. ADC is input from LIN1/RIN1 or LIN2/RIN2 and it measures included in IPGA. The value of IPGA is set 0dB.
Internal HPF cancels the offset of IPGA and ADC.
Note: 4. In case of power-down mode, all digital input pins including clocks pins (MCLK, BCLK and LRCK) are held
VD or VSS. PDN pin is held VSS.
MS0054-E-02
-4-
2004/12