ASAHI KASEI
[AK4520A]
ANALOG CHARACTERISTICS
(Ta=25°C; VA,VD=5.0V; AGND=DGND=0V; VREFH=VA; VREFL=AGND; fs=44.1kHz; SCLK=64fs,
Signal Frequency=1kHz; 20bit Data; Measurement frequency=10Hz∼20kHz; unless otherwise specified)
Parameter
min
typ
max
ADC Analog Input Characteristics: Differential Inputs; Analog Source Impedance=470Ω
Resolution
S/(N+D)
(-0.5dB Input)
20
80
84
90
94
90
94
90
86
90
96
100
96
100
110
0.1
20
1.8
3.0
30
50
VA=3V
(Note 3 )
VA=5V
DR (-60dB Input, A-Weighted)
VA=3V
(Note 4 )
VA=5V
S/N
(A-Weighted)
VA=3V
(Note 4 ,5 ) VA=5V
Interchannel Isolation
Interchannel Gain Mismatch
Gain Drift
Input Voltage
VA=3V
AIN=0.6x(VREFH-VREFL)
VA=5V
Input Resistance
Power Supply Rejection
(Note 6 )
DAC Analog Output Characteristics:
Resolution
S/(N+D)
20
VA=3V
VA=5V
VA=3V
VA=5V
VA=3V
VA=5V
84
80
92
96
92
96
90
90
90
96
100
96
100
110
0.1
20
1.88
3.13
Bits
dB
dB
dB
dB
dB
dB
dB
dB
ppm/°C
Units
Bits
dB
dB
dB
dB
dB
dB
dB
dB
ppm/°C
Vpp
Vpp
kΩ
dB
0.3
1.9
3.15
1.7
2.85
20
DR (-60dB Output, A-Weighted)
(Note 4 )
S/N
(A-Weighted)
(Note 7,5 )
Interchannel Isolation
Interchannel Gain Mismatch
0.3
Gain Drift
Output Voltage
VA=3V
1.76
1.99
Vpp
AOUT=0.626x(VREFH-VREFL)
VA=5V
2.94
3.32
Vpp
kΩ
Load Resistance
10
Load Capacitance
25
pF
Power Supply Rejection
(Note 6 )
50
dB
Note: 3 . In case of single ended input, S/(N+D)=84dB(typ, @VA=5V).
4 . In case of 16bit, DR and S/N of ADC are 98dB. DR of DAC is 98dB.
5 . S/N measured by CCIR-ARM is 96dB at each converter and 94dB at ADC to DAC loopback.
6 . PSR is applied to VA,VD with 1kHz, 50mVpp. VREFH/VREFL pin is held a constant voltage.
7 . As the input data is "0", S/N is 100dB regardless of resolution.
0163-E-00
-5-
1997/3
AKM [ ASAHI KASEI MICROSYSTEMS ]
