
ASAHI KASEI
[AK4522]
M0020-E-01
1998/10
- 5 -
ANALOG CHARACTERISTICS
(Ta=25
°
C; VA, VD=5V; AGND, DGND=0V; VREFH=VA; fs=44.1kHz; SCLK=64fs;
  Signal Frequency =1kHz; 20bit Data; Measurement Frequency=10Hz 
~
 20kHz; unless otherwise specified)
Parameter
ADC Analog Input Characteristics:    Differential Inputs; Analog Source Impedance=470
Resolution
S/(N+D)              (-0.5dB Input)                                  (Note 4)
DR                      (-60dB Input, A-Weighted)              (Note 5)
S/N                      (A-Weighted)                                   (Note 5, 6)
Interchannel Isolation
Interchannel Gain Mismatch
Gain Drift
Input Voltage               (AIN=0.6 x VREFH)              (Note 7)
Input Resistance
Power Supply Rejection                                              (Note 8)
DAC Analog Output Characteristics:
Resolution
S/(N+D)
DR           (-60dB Output, A-Weighted)                      (Note 5)
S/N          (A-Weighted)                                              (Note 6, 9)
Interchannel Isolation
Interchannel Gain Mismatch
Gain Drift
Output Voltage                   (AOUT=0.6 x VREFH)
Load Resistance
Load Capacitance
Power Supply Rejection                                              (Note 8)
Power Supplies
Power Supply Current    (VA=VD=5V)
Analog, VA    PD =”H”
Digital, VD    PD =”H”
min
typ
max
Units
20
Bits
dB
dB
dB
dB
dB
ppm/
°
C
Vpp
k
dB
84
94
94
90
92
100
100
110
0.1
20
3.0
30
50
0.3
2.85
20
3.15
20
Bits
dB
dB
dB
dB
dB
ppm/
°
C
Vpp
k
pF
dB
80
95
95
90
90
100
100
110
0.2
20
2.9
0.5
2.65
5
3.15
25
50
42
10
55
20
mA
mA
Note:  4. In case of single ended input, S/(N+D)=80dB(typ, @VA=5V).
  5. In case of 16bit, DR and S/N of ADC are 98dB. DR of DAC is 98dB.
  6. S/N measured by CCIR-ARM is 96dB at each converter and 94dB at ADC to DAC loopback.
  7. Full scale input for each AIN+/- pin is 1.5Vpp in differential mode.
  8. PSR is applied to VA, VD with 1kHz, 50mVpp. VREFH pin is held a constant voltage.
  9. As the input data is “0”, S/N is 100dB regardless of resolution.