AKD5388-A Datasheet, PDF (8/36 Pages) Asahi Kasei Microsystems – AK5388 Evaluation Board Rev.4

[AKD5388-A]
Analog input buffer circuit
An analog input buffer circuit example (1^st order HPF; fc=0.70Hz, 2^nd order LPF; fc=304kHz,
gain=-14.5dB) is shown in Figure 2. The analog signal is able to input through XLR or RCA connectors.
(For RCA input, jumper should be short. For XLR input, jumper should be open.) The input level of this
circuit is +/-15.4Vpp (AK5388: +/-2.9Vpp Typ.). When using this circuit, analog characteristics at
fs=48kHz is DR=118dB, S/(N+D)=TBDdB.
4.7k
620
Analog In
15.4Vpp
4.7k ^VP+
-
+
VP-
JP
1n
Vin- ^{68µ 3.3k}
10
-
+
Bias
NJM5534D
NJM5534D
2.9Vpp
AK5388 AIN+
VA+
10k
+
10k
10µ
XLR
Bias
JP
0.1µ
VA=+5V
Vin+
VP=±15V
620
68µ
1n
3.3k
-
10
+
NJM5534D
Bias
Figure 2. Analog input buffer circuits examples
24.2n
AK5388 AIN-
2.9Vpp
Fin
1Hz
10Hz
Frequency Response -1.56dB -0.02dB
Table 9. Frequency Response of HPF
Fin
20kHz
40kHz 6.144MHz
Frequency Response -0.005dB -0.02dB -15.6dB
Table 10. Frequency Response of LPF
* AKEMD assumes no responsibility for the trouble when using the circuit examples.
<KM090205>
-8-
2009/03