ASAHI KASEI
[AK4550]
ANALOG CHARACTERISTICS
(Ta=25°C; VDD=2.5V; fs=44.1kHz; Signal Frequency=1kHz; SCLK=64fs; Measurement frequency=10Hz
∼
20kHz;
unless otherwise specified)
Parameter
min
typ
max
Units
ADC Analog Input Characteristics:
Analog Source Impedance=470Ω (Note 2)
Resolution
16
Bits
S/(N+D)
(-0.5dB Input)
72
82
dB
D-Range
(-60dB Input, A-weighted)
82
89
dB
S/N
(A-weighted)
82
89
dB
Interchannel Isolation
80
95
dB
Interchannel Gain Mismatch
0.2
0.5
dB
Input Voltage
(Note 3)
1.35
1.50
1.65
Vpp
Input Resistance
50
100
kΩ
Power Supply Rejection
(Note 4)
35
dB
DAC Analog Output Characteristics:
(Note 5)
Resolution
16
Bits
S/(N+D)
75
85
dB
D-Range
(-60dB Output, A-weighted)
86
92
dB
S/N
(A-weighted)
86
92
dB
Interchannel Isolation
80
95
dB
Interchannel Gain Mismatch
0.2
0.5
dB
Output Voltage
(Note 3)
1.35
1.50
1.65
Vpp
Load Resistance
10
kΩ
Load Capacitance
30
pF
Power Supply Rejection
(Note 4)
50
dB
Power Supplies
Power Supply Current
10
15
mA
AD+DA
PWAD = “H”, PWDA = “H”
5.6
8.4
mA
AD
PWAD = “H”, PWDA = “L”
5.6
8.4
mA
PWAD = “L”, PWDA = “H”
DA
10
50
uA
PWAD = “L”, PWDA = “L”
Power down (Note 6)
Power Consumption
25
37.5
mW
AD+DA
PWAD = “H”, PWDA = “H”
14
21
mW
AD
PWAD = “H”, PWDA = “L”
14
21
mW
PWAD = “L”, PWDA = “H”
DA
25
125
uW
Power down (Note 6) PWAD = “L”, PWDA = “L”
Notes: 2. The offset of ADC is removed by internal HPF.
3. Input /Output of ADC and DAC scales with VDD voltage. 0.6 X VDD(typ).
4. PSR is applied to VDD with 1kHz, 50mV.
5. Measured by AD725C (SHIBASOKU). RMS mode.
6. In case of power-down mode, all digital input including clocks pins (MCLK, SCLK, LRCK) are held VDD
or VSS. But PWAD and PWDA pins are held VSS.
M0068-E-01
-4-
2000/4
AKM [ ASAHI KASEI MICROSYSTEMS ]
