參數(shù)資料
型號: AKD4356
廠商: Asahi Kasei Microsystems Co.,Ltd
英文描述: EVALUATION BOARD REV.B FOR AK4356
中文描述: 評價委員會REV.B的AK4356
文件頁數(shù): 2/27頁
文件大?。?/td> 297K
代理商: AKD4356
ASAHI KASEI
[AKD4356]
<KM060602>
’99/11
- 2 -
n
External analog circuit
The 2nd order LPF (fc=93.2kHz, Q=0.712) which adds differential outputs of AK4356 is implemented on the board.
When the further attenuation of the out-band noise is needed, some additional LPF is required. Analog signal is output
through BNC connectors on the board. And the output level of AK4356 is 5.5Vpp@5V.
The AK4356 detects input signal “zero” conditions and assert high on DZFL/DZFR pins. As shown on Figure 2, analog
output is muted externally with this signal.
LOUT-
(ROUT-)
AVDD
DZFL*
(DZFR*)
JP*
-
RN1202
LOUT-
(ROUT-)
DZFL*
(DZFR*)
RN2202
2SC3327
+12V
-12V
NJM5532D
R1
C1
R3
R2
C2
R1
R3
R2
C2
22u
10k
+
220
Figure 2. On-board analog filter
R1
4.7k
R2
4.7k
R3
200
C1
C2
470p
3300p
Table 1. The value of R,C on this board
fin
20kHz
-0.004dB
40kHz
-0.123dB
80kHz
-1.823dB
Frequency Response
Table 2. Frequency Response of LPF
<Calculation>
f
C
=
ω
0
2
π
,
ω
0
=
1
2*C1*C2*R2*R3
,
Q=
2*C1*
ω
0
+
R2
.
1
R1
+
1
1
R3
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