AK4520A Datasheet, PDF (5/19 Pages) Asahi Kasei Microsystems – 100dB 20Bit Stereo ADC & DAC

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
Units
ADC Analog Input Characteristics: Differential Inputs; Analog Source Impedance=470Ω
Resolution
20
Bits
S/(N+D) (-0.5dB Input)
VA=3V
80
86
dB
(Note 3 ) VA=5V
84
90
dB
DR (-60dB Input, A-Weighted)
VA=3V
90
96
dB
(Note 4 ) VA=5V
94
100
dB
S/N
(A-Weighted)
VA=3V
90
96
dB
(Note 4 ,5 ) VA=5V
94
100
dB
Interchannel Isolation
90
110
dB
Interchannel Gain Mismatch
0.1
0.3
dB
Gain Drift
20
ppm/°C
Input Voltage
VA=3V
1.7
1.8
1.9
Vpp
AIN=0.6x(VREFH-VREFL)
VA=5V
2.85
3.0
3.15
Vpp
Input Resistance
20
30
kΩ
Power Supply Rejection
(Note 6 )
50
dB
DAC Analog Output Characteristics:
Resolution
20
Bits
S/(N+D)
VA=3V
84
90
dB
VA=5V
80
90
dB
DR (-60dB Output, A-Weighted)
VA=3V
92
96
dB
(Note 4 ) VA=5V
96
100
dB
S/N
(A-Weighted)
VA=3V
92
96
dB
(Note 7,5 ) VA=5V
96
100
dB
Interchannel Isolation
90
110
dB
Interchannel Gain Mismatch
0.1
0.3
dB
Gain Drift
20
ppm/°C
Output Voltage
VA=3V
1.76
1.88
1.99
Vpp
AOUT=0.626x(VREFH-VREFL)
VA=5V
2.94
3.13
3.32
Vpp
Load Resistance
10
kΩ
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