AK8130B

ASAHI KASEI EMD CORPORATION
Evaluation Board for AK8130
AKD8130
Ordering guide
Description
The AKD8130 is an evaluation board for AK8130
clock generator family. Therefore, it is easy to
evaluate the jitters and VCXO performance.
4 types of boards are prepared depending on
crystal foot pattern.

AKD813X_C
X: Device type
0:AK8130
0A:AK8130A
0B:AK8130B
C: Crystal type
N: Non Crystal
A: 49 Surface mount type
B: 5032 2 terminal
C: 3025 2 terminal
D: 3225 4 terminal
Block Diagram
AK8130 Evaluation Board
VDD
VSS
CLK1
CLK2
VIN1.65V
AK8130
CLK3
VDD
CLK4
REFOUT
AK8145miniBoard
AK8142
AK811x
CLK1
PIC
AK8142
AKD0598-E-00
CLK2
Jan-08
-1-
The brand name
of AKEMD’s IC’s
AKD8130
Functions
3.PWM Filter
3. VIN Direct Input
5.Crystal Unit
1.Power
2.DIPSW
6.AK811x
4.Dummy Capacitors
Figure 1. AKD8130 top view
1.
Power Supply
Please connect the lead line to VDDPAD (3V) and VSSPAD (GND).
2.
DIPSW Setting
DISPSW6-10 are connected to the mode setting pins of AK8130 and AK811x.
If these pins are controlled with general-purpose port, microprocessor or other methods, please keep these
pins “open”.
SWn
SWn
VDD
(HIGH)
OPEN
Table1.1
SW
SW6
SW7
SW8
SW9
SW10
SWn
GND
(LO)
Connect to:
AK8130 Pin2
AK8130 Pin3
AK8130 Pin14
AK811x Pin5
AK811x Pin4
Jan-08
AKD0598-E-00
-2-
The brand name
of AKEMD’s IC’s
AKD8130
3.
Smoothing filter for PWM signal
There are patterns to configure a passive smoothing filter for PWM signal which is supplied to control the
oscillation frequency of VCXO. It is necessary to mount resistor and condenser on these patterns and also
input PWM signal between VIN and VSS12 pins when this filter is employed. It is also possible to control the
voltage without using this filter. In this case, please input DC voltage directly to CN2 pin over VSS8 pin.
4.
Dummy capacitor loads
There are several dummy capacitor loads, C23 through C27. It is useful to measure clock performance or
current consumption by loading capacitor which is virtually assumed in the system. It is important to take line
capacitance into account and it is approximately 5pF. Consequently if there is 25pF capacitance assumed in
the system, another 20pF capacitor needs to be mounted. Each clock outputs from AK8130 lead to J8 through
J12. Chassis mount test jacks for miniature probe (Tektronix 131-0258-00) are available by mounting there.
Table1.2
Jn/Cn
J8/C8
J9/C9
J10/C10
J11/C11
J12/C12
5.
Connect to:
AK8130 Pin11
AK8130 Pin10
AK8130 Pin7
AK8130 Pin8
AK8130 Pin9
Quartz oscillator foot pattern
There are 4 types of boards depending on quartz oscillator. VCXO is controlled its oscillation frequency by
capacitance fluctuation of quartz oscillator. Therefore parasitic capacitance exists on the line pattern affects
the oscillation performance. However in this board, ground patterns under quartz oscillator and Pin1/Pin16 is
removed to minimize the unwanted affection. It is possible to check and tune characteristics of VCXO by using
this board because those characteristics are adjustable by changing load capacitor, C17 and C18, to the
suitable value. Please refer VCXO characteristic as a example.
6.
AK811x foot pattern
It is possible to mount AK811x series 1ch-PLL on this board.
Jan-08
AKD0598-E-00
-3-
The brand name
of AKEMD’s IC’s
AKD8130
Jitter measurement
Device:AK8130B
Condition: S2/S1/S0=HHH, Dummy capacitor=0pF
Jan-08
AKD0598-E-00
-4-
The brand name
of AKEMD’s IC’s
AKD8130
Pullable Range Profile tested
Device:AK8130
27.0MHz VCXO Characteristics NDK AT-41CD2(CL=12.0pF)
(Cext1=18.0pF,Cext2=5.0pF)
150
100
Δf(ppm)
50
0
-50
0
0.5
1
1.5
2
2.5
3
3.5
Parts Name
Manufacture
Parameter
Motional inductance
Motional capacitance
Equivalent resistance
Shunt capacitance
Load capacitance@27M
L1
C1
R1
C0
CL
Cext1
Cext2
C17
C18
AT-41CD2
NDK
Unit
mH
2
fF
17.3
Ω
8.7
pF
4.2
pF
12
-100
-150
VIN(V)
27.0MHz VCXO Characteristics NDK NX5032GA (CL=8.0pF)
(Cext1=12.0pF, Cext2=1.0pF)
150.0
100.0
Δ f(ppm)
50.0
0.0
0
0.5
1
1.5
2
2.5
3
3.5
-50.0
-100.0
-150.0
VIN(V)
27.0MHz VCXO Characteristics KDS SMD49 (CL=8.7pF)
(Cext1=15.0pF, Cext2=1.0pF)
200.0
150.0
Δ f(ppm)
100.0
50.0
0.0
-50.0
0
0.5
1
1.5
2
2.5
3
3.5
pF
pF
18.0
5.0
Parts Name
Manufacture
Parameter
Motional inductance
Motional capacitance
Equivalent resistance
Shunt capacitance
Load capacitance @27M
NX5032GA
NDK
Unit
mH
5.71
fF
6.09
Ω
10
pF
1.5
pF
8.0
L1
C1
R1
C0
CL
Cext1
Cext2
C17
C18
pF
pF
Parts Name
Manufacture
Parameter
Motional inductance
Motional capacitance
Equivalent resistance
Shunt capacitance
Load capacitance@ 27M
L1
C1
R1
C0
CL
SMD49
KDS
Unit
mH
4.4
fF
7.9
Ω
6.0
pF
1.8
pF
8.7
Cext1
Cext2
C17
C18
pF
pF
Parts Name
Manufacture
Parameter
Motional inductance
Motional capacitance
Equivalent resistance
Shunt capacitance
Load capacitance@ 27M
L1
C1
R1
C0
CL
SMD49
KDS
Unit
mH
4.4
fF
7.9
Ω
6.0
pF
1.8
pF
10.0
Cext1
Cext2
C17
C18
pF
pF
12.0
1.0
-100.0
-150.0
-200.0
VIN(V)
SMD49 (CL:10.0pF)
Cext1=10.0pF, Cext2=5.0pF
150.0
100.0
Δ f(ppm)
50.0
0.0
0
0.5
1
1.5
2
2.5
3
3.5
-50.0
-100.0
-150.0
VIN(V)
Jan-08
15.0
1.0
10.0
5.0
AKD0598-E-00
-5-
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