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參數(shù)資料
| 型號(hào)： | AK4525 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | 20BIT STEREO ADC & DAC WITH X TAL OSC |
| 中文描述： | 20位立體聲ADC |
| 文件頁數(shù)： | 5/18頁 |
| 文件大小： | 152K |
| 代理商： | AK4525 |
ASAHI KASEI
[AK4525]
MS0053-E-00
2000/9
- 5 -
ANALOG CHARACTERISTICS
(Ta=25
°
C; VA, VD=5.0V; 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=0.58 x VREFH)
Load Resistance
Load Capacitance
Power Supply Rejection (Note 8)
Power Supplies VA=VD=5V
Analog, VA
PDN= “H”
Digital, VD
PDN= “H”
Power Down
PDN= “L” (Note 10)
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
25
50
0.3
2.85
15
3.15
20
Bits
dB
dB
dB
dB
dB
ppm/
°
C
Vpp
k
pF
dB
80
94
94
90
90
100
100
110
0.2
20
2.9
0.5
-
3.15
2.65
5
25
50
40
12
6
55
20
12
mA
mA
mA
Notes: 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.
10. X’tal circuit is oscillating and all digital input pins are held VD or DGND.
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