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ASAHI KASEI
[AKD4589-B]
<KM076201>
2005/07
-
8
-
Analog Outputs
BNC connector J2 (LOUT1), J1 (ROUT1), J4 (LOUT2), J3 (ROUT2), J6 (LOUT3), J5 (ROUT3) J8 (LOUT4) ,J7
(ROUT4) are used for analog outputs on the AKD4589-B. Analog outputs are single-ended and output ranges of each
channels are nominally
±
3.82Vpp@5V. (Analog outputs of AK4589 device are differencial and output ranges of
each channels are nominally
±
[email protected], input ranges of AKD4589-B becomes to
±
3.82Vpp@5V,about
1.41 times of the value in the case of AK4589 device.Output range of AK4589 device is proportional to VREFH
(2.7= 0.54 x VREFH). VREFH is connected to AVDD on the AKD4589-B.)
Analog Output Circuit
330
100u
180
AOUTL-
10k
3.9n
1.
2k
680
3.3n
6
4
3
2
7
10u
0.1u
0.1u
10u
10u
NJM4580
330
100u
180
AOUTL+
10k
3.9n
1.
2k
680
3.3n
6
4
3
2
7
10u
0.1u
0.1u
10u
NJM4580
0.1u
+
NJM4580
0.1u
10u
100
4
3
2
1.0n
620
620
560
7
+
+
+
+
-
+
-
+
+
+
-
+
+
1.0n
Lch
-15
+15
6
560
Figure 8. Analog Output Circuit
The differential output circuit(2nd order LPF,fc=182KHz,Q=0.637,G=+3.9dB) and LPF(1st order LPF, fc=284KHz,
G=-0.84dB) is implemented on AKD4589-B. The differential outputs of AK4589 is buffered by non-inverted circuit and
output via Cannon connector (differential output). LPF adds differential outputs. NJM4580 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
±
3.82Vpp(typ@VREF=5.0V) by BNC.
* AKM assumes no responsibility for the trouble when using the above circuit examples.