參數(shù)資料
型號(hào): AK5393-VS
廠商: Asahi Kasei Microsystems Co.,Ltd
英文描述: Enhanced Dual bit 96 kHz 24-bit ADC
中文描述: 增強(qiáng)雙位96 kHz的24位ADC
文件頁(yè)數(shù): 16/18頁(yè)
文件大小: 112K
代理商: AK5393-VS
ASAHI KASEI
[AK5393]
M0038-E-04
2000/4
- 16 -
Figure 7shows an input buffer circuit example 1. This is a full-differential input buffer circuit with an inverted-amp
(gain :-10dB). The capacitor of 10nF between AIN+ /- decreases the clock feed through noise of modulator, and composes
a 1st order LPF(fc=360kHz) with 22ohm resistor before the capacitor. This circuit also has a 1st order LPF(fc=370kHz)
composed of op-amp. In this example, the internal offset is removed by self calibration. The evaluation board should be
referred about the detail.
4.7k
4.7k
-
+
-
+
22
3k
910
-
+
22
910
AK5393
AIN+
AIN-
CAL
ZCAL
Analog In
8.1Vpp
"L" at self calibration
47
μ
47
μ
NJM5532
VA=
±
5V
VP=
±
15V
10
μ
+
10k
10k
0.1
μ
Bias
VA+
2.45Vpp
2.45Vpp
VP+
VP-
Bias
470p
3k
470p
Bias
10n
Figure 7 Differential Input Buffer Example 1
Figure 8 shows an input buffer circuit example 2. (1
st
order HPF; fc=0.66Hz, Table 4, 1
st
order LPF; fc=590kHz, gain=-
14dB, Table 5). The analog signal is able to input through XLR or BNC connectors.
(short JP1 and JP2 for BNC input, open
JP1 and JP2 for XLR input)
. The input level of this circuit is +/-12.4Vpp (AK5393: +/-2.45Vpp Typ.).
180
100
Bias
Vin+
AK5393 AIN+
-
+
VA
1.5n
1k
10k
22u
180
Vin-
AK5393 AIN-
-
+
1k
22u
10k
0.1u
10u
4.7k
4.7k
XLR
BNC
-
+
4.7k
4.7k
JP2
JP1
NJM5534
NJM5534
NJM5534
2.45Vpp
2.45Vpp
12.4Vpp
12.4Vpp
Figure 8 Differential Input Buffer Example 2
fin
1Hz
-1.56dB
10Hz
-0.02dB
Frequency Response
Table 4. Frequency Response of HPF
fin
20kHz
-0.005dB
40kHz
-0.02dB
6.144MHz
-15.6dB
Frequency Response
Table 5. Frequency Response of LPF
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