AKD4621-B Datasheet, PDF (13/50 Pages) Asahi Kasei Microsystems – AK4621 Evaluation board Rev.2

[AKD4621-B]
„ Analog Output Buffer 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 board. The differential outputs of AK4621 is buffered by non-inverted circuit and output
via Cannon connector (differential output). LPF adds differential outputs. 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
37
2
+
-4
6
NJM5534D
680
+ _10u
0.1u
10u
+
0.1u
100u
AOUTL+ ⁺
330
3.3n
180
3.9n
3
7
+
2-
6
4
NJM5534D
680
+ _10u
0.1u
10u
+
0.1u
+15
-15
560
0.1u +^10u
1.0n
620
620
2 _- 4 ₆ ¹⁰⁰
3 ⁺⁷
Lch
1.0n NJM5534D
0.1u
+ _10u
Figure 4. Output buffer circuit
* AKM assumes no responsibility for the trouble when using the above circuit examples.
<KM100802>
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2010/12