ASAHI KASEI
[AKD4552-A]
<KM080600>
2005/10
-
2
-
Analog Input Circuit
External analog signal fed through the BNC connector is terminated by a resistor of 560 ohms. The resistor value should
be properly selected in order to meet the output impedance of the signal source.
LIN(RIN)pin
R6(R4)
560
+
C4(C2)
10u
J4(J2)
LIN(RIN)
Figure 2. Input buffer circuit on board
* AKM assumes no responsibility for the trouble when using the circuit examples.
Analog Output Circuit
The AK4552 includes a combination of switched-capacitor filter (SCF) and continuous-time filter (CTF), so any external
filters are not required.
Operation sequence
1) Set up the power supply lines.
[VA] (orange) = 2.4
∼
4.0V : for VA of AK4552 (typ. 3.0V)
[D2V] (orange) =
2.4
∼
4.0V : for D2V of 74LVC541 (typ. 3.0V)
[VCC]
(red)
=
3.6
∼
5.0V : for logic
[AGND] (black)
=
0V
:
for
analog
ground
(including
VSS
of
AK4552)
[DGND] (black)
=
0V
:
for
logic
ground
Each supply line should be distributed from the power supply unit.
D2V and VA must be same voltage level.
2) Set up the evaluation mode, jumper pins and DIP switches.
(See the followings.)
3) Power on.
The AK4552 should be reset once bringing SW1 (PDN) “L” upon power-up.
Evaluation mode
Applicable
Evaluation
Mode
(1) Evaluation of A/D using DIT (Optical Link)
(2) Evaluation of D/A using DIR (Optical Link)
(3) Evaluation of loopback mode (default)
(4) Evaluation of D/A using A/D converted data
(5) Evaluation of A/D using D/A converted data
(6) All interface signals including master clock are fed externally.