ASAHI KASEI
[AK4526A]
ANALOG CHARACTERISTICS
(Ta=25°C; AVDD, DVDD=5V; AVSS, DVSS=0V; VREFH=AVDD, VREFL=AVSS; fs=44.1kHz;
Signal Frequency =1kHz; 20bit Data; Measurement Frequency=10Hz
∼
20kHz; unless otherwise specified)
Parameter
min
typ
max
Units
ADC Analog Input Characteristics: Differential Inputs; Analog Source Impedance=470Ω
Resolution
20
Bits
S/(N+D)
(-0.5dB Input)
(Note 4)
84
92
dB
DR
(-60dB Input, A-Weighted)
94
100
dB
S/N
(A-Weighted)
(Note 5)
94
100
dB
Interchannel Isolation
90
110
dB
DC Accuracy
Interchannel Gain Mismatch
0.2
0.3
dB
Gain Drift
20
-
ppm/°C
Input Voltage
AIN=0.6x(VREFH-VREFL)
(Note 6)
2.85
3.0
3.15
Vpp
Input Resistance
20
30
kΩ
Power Supply Rejection
(Note 7)
50
dB
DAC Analog Output Characteristics:
Resolution
24
Bits
S/(N+D)
fs=44.1kHz
80
90
dB
fs=96kHz
78
88
dB
DR
(-60dB Output, A-Weighted)
fs=44.1kHz
95
100
dB
fs=96kHz
94
100
dB
S/N
(A-Weighted)
(Note 5)
fs=44.1kHz
95
100
dB
(Note 8) fs=96kHz
94
100
dB
Interchannel Isolation
90
110
dB
DC Accuracy
Interchannel Gain Mismatch
0.2
0.5
dB
Gain Drift
20
-
ppm/°C
Output Voltage
AOUT=0.6x(VREFH-VREFL)
2.75
3.0
3.25
Vpp
Load Resistance
5
kΩ
Power Supply Rejection
(Note 7)
50
dB
Output Volume
Step Size
0
1
dB
Attenuation Control Range
-20
0
dB
Power Supplies
Power Supply Current (AVDD+DVDD)
Normal Operation
( PD =”H”)
DFS=”L”
Power-down mode ( PD =”L”)
XTS=”L”
(Note 10)
1
2
mA
(Note 9)
113
157
mA
Note: 4. In case of single ended input, S/(N+D)=83dB(typ, @AVDD=5V).
5. S/N measured by CCIR-ARM is 96dB at each converter and 94dB at ADC to DAC loopback.
6. Full scale input for each AIN+/- pin is 1.5Vpp in differential mode.
7. PSR is applied to AVDD, DVDD with 1kHz, 50mVpp. VREFH/VREFL pin is held a constant voltage.
8. DR and S/N at BW=40kHz are typically 93dB.
9. Typically, AVDD=90mA, DVDD=23mA. When DFS=”H”, AVDD=76mA and DVDD=22mA.
10. All digital input pins are held DVDD or DVSS. When XTS=”H”, typically 15mA.
M0037-E-02
-7-
1999/6
AKM [ ASAHI KASEI MICROSYSTEMS ]
