AK8128C

AKD8127/8
Evaluation Board for AK8127/8
AKD8127/8
Ordering guide
Description
The AKD8127/8 is a common evaluation board
for clock generator, AK8127 and AK8128 family.
Therefore, it is possible to evaluate spectrum
characteristics and other performances.

AKD8127XY
XY: 70:
8A:
8B:
8C:
Device Type
AK8127
AK8128A
AK8128B
AK8128C
Block Diagram
VDD GND
AK8127
AK8128X
CKOUT1
EXT-IN
CKOUT2
Configuration SW
AKD8127 Evaluation
AKD0999-E-00
Board
Mar-2010
-1-
AKD8127/8
Functions
5. DIPSW
SW3 SW2 SW1
3. Clock Output 1
4. Clock Output 2
2. Clock Input
1. Power supply
Figure1.
AKD8127/8 Top view
1. Power Supply
Please connect the lead line to VDD (3.3V; Red) and VSS (GND; Black).
2. Clock input
It is possible to input clock from SMA-A connector.
3. 4. Clock output
Clock output from AK8127_AK8128X leads to this
connector. Spectrum Analyzer or Oscilloscope is
available to measure clock performances by
connecting here.
CLKOUT1
CLKOUT2
AK8127
CKOUT1
CKOUT2
AK8128A
CKOUT
AK8128B
CKOUT
Mar-2010
AK8128C
CKOUT
-
AKD0999-E-00
-2-
AKD8127/8
5. DIPSW
L: Connect to GND
M: Open
H; Connect to VDD
5.1 AK8127
SW3 Spread Ratio Selection
SW3 (S: Pin9)
L
M (L)
H
Spread Ratio
±1.5%
±1.5%
±3.0%
SW2 SW3 Output Frequency Selection
SW1(F1:Pin7)
L
L
L
M(L)
M(L)
M(L)
H
H
H
SW2(F0:Pin8)
L
M
H
L
M
H
L
M
H
CKOUT1(MHz)
20
20
20
20
20
20
20
20
20
CKOUT2(MHz)
60
75
80
60
75
80
95
97.5
96.675
5.2 AK8128A
SW3 SW2 Output Frequency Selection
SW3(F1:Pin9)
L
L
L
M(L)
M(L)
M(L)
H
H
H
SW2(F0:Pin8)
L
M(L)
H
L
M(L)
H
L
M(L)
H
CKOUT(MHz)
74.25
74.25
74.25/1.001
74.25
74.25
74.25/1.001
148.5
148.5
148.5/1.001
SW1 Not Used
Mar-2010
AKD0999-E-00
-3-
AKD8127/8
5.3 AK8128B
SW3 SW2 Output Frequency Selection
SW3(F1:Pin9)
L
L
L
M(L)
M(L)
M(L)
H
H
H
SW2(F0:Pin8)
L
M(L)
H
L
M(L)
H
L
M(L)
H
CKOUT(MHz)
74.25
74.25
74.25/1.001
74.25
74.25
74.25/1.001
148.5
148.5
148.5/1.001
SW1 Input Clock Frequency Selection
SW1 (S: Pin9)
L
M (L)
H
Input Frequency (MHz)
27.000
27.000
48.000
5.4 AK8128C
SW3 SW2 Output Frequency Selection
SW3(F1:Pin9)
L
L
L
M(L)
M(L)
M(L)
H
H
H
SW2(F0:Pin8)
L
M(L)
H
L
M(L)
H
L
M(L)
H
CKOUT(MHz)
33.8688
33.8688
36.864
33.8688
33.8688
36.864
12.288
12.288
24.576
SW1 Not Used
Mar-2010
AKD0999-E-00
-4-
7
6
5
4
3
2
1
U4
hole_L
E
1
HOLE0 H10
HOLE0 H9
GND1
GND
E
HOLE0 H8
HOLE0 H7
HOLE10 H03
GND1
HOLE01 H01
VCC_1
VCC_1
HOLE00 H1
GND1
VCC_2
HOLE09 H02
HOLE10 H02
D
HOLE09 H01
HOLE0 H4
D
SW3 1 VDD
2
HOLE02 H01
GND1
GND1
HOLE03 H01
Ctantaru
0.1uF
C4
HOLE04 H01
C
HOLE0 H6
VDD2
Ctantaru
10uF
C2
GND2
AK8127
VDD 1
VSS 2
CKIN 3
VSS 4
VDD 5
HOLE10 H01
10 CKOUT2
9 S
8 F0
7 F1
6 CKOUT1
HOLE00 H4
VCC_2
C
IC1
2
HOLE06 H03
B
hole_L
GND2
HOLE03 H02
1
2
GND2
U3
HOLE0 H3
1
ckin
GND1
GND2
R7
RES_PIN
HOLE0 H15
HOLE0 H14
GND
5
GND4
U1
HOLE06 H02
3
SW
HOLE0 H3
(Not Mount)
GND3
4
1 VDD
SW1
HOLE00 H3
GND2
3
3
SW
HOLE05 H01
SMA
1 VDD
SW2
HOLE06 H01
VCC_2
3
2
GND2
B
SW
HOLE07 H02
HOLE0 H5
Ctantaru
0.1uF
C3
HOLE08 H02
C1
10uF
Ctantaru
HOLE07 H01
VDD1
HOLE08 H01
HOLE00 H2
GND2
HOLE0 H13
HOLE0 H12
GND2
HOLE0 H11
A
GND2
A
Title
AKD8127_10PIN
Size
A
Document Number
<Doc>
Date:
7
6
5
4
3
Rev
<RevCode>
Monday, July 30, 2007
Sheet
2
1
of
1
1
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