AKD4397-SB Datasheet, PDF (4/30 Pages) Asahi Kasei Microsystems – 192kHz sampling 32Bit ΔΣ DAC

[AKD4397-SB]
The frequency of the master clock output is set by OCKS0 and OCKS1 as shown in Table 4.
OCKS1
0
1
1
OCKS0
0
0
1
MCLK Frequency
256fs @fs=88.2/96kHz
512fs @fs=32/44.1/48kHz
128fs @fs=176.4/192kHz
Table 4 MCLK Clock
Default
„ SW1 setting
[SW1](PDN): Reset of AK4397. Select “H” during operation.
 External Analog Circuit
The differential output circuit and LPF is implemented on board. The differential outputs of AK4397 is buffered by non-inverted circuit(2^nd
order LPF, fc=182k, Q=0.637, G=+3.9dB). LPF adds differential outputs(1^st order LPF, fc=284k, G=-0.84dB). NJM5534D is used for
op-amp on this board that has low noise and high voltage torelance characteristics. Analog signal is output via BNC connectors on the board.
The output level is about 2.8Vrms (typ@VREF=5.0V) by BNC.
100u
AOUTL- ⁺
330
3.3n
180
3.9n
NJM4580D
58
6
+
-4
7
680
+ _10u
0.1u
10u
+
0.1u
100u
AOUTL+ ⁺
330
3.3n
180
3.9n
NJM4580D
38
2
+
-
1
4
680
+ _10u
0.1u
10u
+
0.1u
+15
-15
620
620
560
0.1u +^10u
1.0n
2 _- 4 ₁ ¹⁰⁰
3+8
Lch
1.0n NJM4580D
0.1u
+_10u
Figure 4 External Analog Filter
AKD4397-SB 40kHz (Double) 80kHz (quad)
Filter
Internal Filter
External LPF
Total
-0.3dB
-0.19dB
-0.49dB
-1dB
-0.85dB
-1.85dB
This table shows typical value.
Table 5 Frequency Responses
<KM088503>
4
2007/07