AKD4589 Datasheet, PDF (8/51 Pages) Asahi Kasei Microsystems – AK4589 Evaluation Board Rev.2

ASAHI KASEI
[AKD4589-B]
„ 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 ʶ3.82Vpp@5V. (Analog outputs of AK4589 device are differencial and output ranges of
each channels are nominally ʶ[e-mail], input ranges of AKD4589-B becomes to ʶ3.82Vpp@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
100u
AOUTL- ⁺
330
3.3n
180
3.9n
37
2
+
-4
6
NJM4580
680
+ _10u
0.1u
10u
+
0.1u
100u
AOUTL+ ⁺
330
3.3n
180
3.9n
37
2
+
-
6
4
NJM4580
680
+ _10u
0.1u
10u
+
0.1u
+15
-15
620
620
560
0.1u +^10u
1.0n
2 _- 4 ₆ ¹⁰⁰
3 ⁺⁷
Lch
1.0n NJM4580
0.1u
+_10u
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 ʶ3.82Vpp(typ@VREF=5.0V) by BNC.
* AKM assumes no responsibility for the trouble when using the above circuit examples.
<KM076201>
-8-
2005/07