AK8125AV

AK8125AV
Spread Spectrum Clock Generator
AK8125AV
Features
Description
Input Frequency:
- Crystal: 6.1-36MHz
- External: 6.1- 49.92MHz
Configurable Spread Spectrum Modulation:
The AK8125A is a spread spectrum clock
generator designed for general purpose EMI
elimination. The device uses the AKM’s original
spread spectrum profile to provide excellent EMI
reduction effect without degradation of system
performance.
The device is available in a very
small 10-pin TMSOP package, and its pin
configuration offers simple PCB layout.
Modulation Ratio:
-0.25%,-0.5%,-1.5%, -3.0%
±0.125%,±0.25%,±0.75%, ±1.5%
- Modulation Frequency
Around 30KHz
Low Jitter Performance:
-
Applications
300 psec (peak) Cycle to Cycle Jitter
600 psec(p-p non-SS) long term
Low Current Consumption:
6.5mA typ.
Supply Voltage:
3.0 – 3.6V
Operating Temperature Range:
-40 to +85℃
Package:
10-pin TMSOP
Lead Free & Halogen Free
HDTV, STB, MFP, etc.
VDD
XIN
Crystal
OSC
PLL
CLKOUT
XOUT
SS_SEL1
Control
SS_SEL0
Logic
OUTMPX
F_SEL0
Vref
F_SEL1
VSS
MS1257-E-01
Aug-11
-1-
AK8125AV
Pin Descriptions
XIN
F_SEL0
VDD
SS_SEL0
OUTMPX
Pin
No.
9
8
7
3
4
5
6
Pin Name
Package: 10-Pin TMSOP (Top View)
XOUT
F_SEL1
VSS
SS_SEL1
CLKOUT
10
1
2
Pin
Type
Description
1
XIN
IN
Crystal connection pin or Reference clock input pin
2
F_SEL0
IN
Frequency range Select Pin0
3
VDD
PWR
4
SS_SEL0
IN
Spread Spectrum Modulation Ratio Select Pin0
(1)
5
OUTMPX
IN
x1, x2, x4 Select pin
(1)
6
CLKOUT
OUT
7
SS_SEL1
IN
8
VSS
PWR
9
F_SEL1
IN
10
XOUT
OUT
(1)
Power Supply
Clock Output
(1)
Spread Spectrum Modulation Ratio Select Pin1
Ground
(1)
Frequency range Select Pin1
Crystal connection pin.
clock is used.
(1) 3-Level Input for Low/Mid/Hi.
Leave this pin floating when the external
Biased at 1/2 of VDD with pull-up/down resistors of 150kW (Typ.).
Ordering Information
Part Number
Marking
Shipping Packaging
Package
Temperature
Range
AK8125AV
125AE
Tape and Reel
10-pin TMSOP
-40 to 85 ℃
Aug-11
MS1257-E-01
-2-
AK8125AV
Absolute Maximum Rating
Over operating free-air temperature range unless otherwise noted
Items
Symbol
Supply Voltage
(1)
Ratings
Unit
V
VDD
-0.3 to 4.6
Input Voltage
Vin
VSS-0.3 to VDD+0.3
V
Input Current (any pins except supplies)
IIN
±10
mA
Tstg
-55 to 130
°C
Storage Temperature
Note
(1) Stress beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
These are stress ratings only. Functional operation of the device at these or any other conditions beyond those
indicated under “Recommended Operating Conditions” is not implied. Exposure to absolute-maximum-rating
conditions for extended periods may affect device reliability. Electrical parameters are guaranteed only over the
recommended operating temperature range.
ESD Sensitive Device
This device is manufactured on a CMOS process, therefore, generically susceptible to
damage by excessive static voltage. Failure to observe proper handling and
installation procedures can cause damage. AKM recommends that this device is handled with
appropriate precautions.
Recommended Operation Conditions
Parameter
Operating Temperature
Symbol
Conditions
Min
Ta
-40
VDD
3.0
Input Clock Frequency
Fin
6.1
Output Load Capacitance
Cpl
Supply Voltage
Typ
Max
Unit
85
°C
3.3
3.6
V
49.92
MHz
15
pF
Note:
(1) A decoupling capacitor of 0.1mF for power supply line should be installed close to VDD pin.
MS1257-E-01
Aug-11
-3-
AK8125AV
DC Characteristics
All specifications at VDD: over 3.0 to 3.6V, Ta: -40 to 85℃, Output Frequency: over specified frequency,
unless otherwise noted
Parameter
Conditions
Symbol
MIN
TYP
MAX
Unit
High Level Input Voltage
VIH
0.85VDD
Middle Level Input Voltage
VIM
0.35VDD 0.50VDD 0.65VDD
V
Low Level Input Voltage
VIL
0.15VDD
V
Input Current
IL
+40
μA
Pin: OUTMPX
SS_SEL[1:0], F_SEL[1:0]
High Level Output
Voltage
VOH
Low Level Output
Voltage
VOL
Current Consumption
IDD
Pin: CLKOUT
IOH=-6mA
V
-40
0.8VDD
V
Pin: CLKOUT
IOL=+6mA
No load, SS_SEL[1:0]=H/H
6.5
OUTMPX=M
0.2VDD
V
10
mA
AC Characteristics
All specifications at VDD: over 3.0 to 3.6V, Ta:-40 to 85℃, Output Frequency: over specified frequency,
unless otherwise noted
Parameter
Pins
Conditions
MIN
MAX
Unit
6.1
36
MHz
70
%
Crystal Oscillator Frequency
XIN
XOUT
Input Clock duty cycle
XIN
30
Input Clock Swing
XIN
1
Output Lock Time
Settling Time
(1)
(2)
CLKOUT
AT cut Crystal
Power-up
CLKOUT
Vpp
1
5
ms
1
2
ms
50
55
%
Output Clock Duty Cycle
CLKOUT
Output Clock Rise Time
CLKOUT
0.2VDD to 0.8VDD
1.5
3.0
ns
Output Clock Fall Time
CLKOUT
0.8VDD to 0.2 VDD
1.5
3.0
ns
Cycle to cycle jitter
CLKOUT
Long term jitter
CLKOUT
45
TYP
See table 1
Cpl=15pF
1000 cycle delay
Cpl=15pF,p-p
SS_SEL[1:0]=”M,M”
ps
600
ps
1.
The time that output reaches the target frequency within accuracy of ±0.1% from the point that the
power supply reaches VDD
2.
The time that output reaches the target frequency within a ccuracy of ±0.1% after SS_SEL[1:0] are
affected.
Aug-11
MS1257-E-01
-4-
AK8125AV
Table 1.
Cycle to Cycle Jitter(Peak, Typ./Max.)
Output Frequency
Modulation Ratio
Down -0.25%,-0.5%
Down -1.5%,-3.0%
Center±0.125%,±0.25%
Center ±0.75%,±1.5%
700ps/1000ps
150ps/450ps
400ps/700ps
200ps/500ps
SS Off
6.1MHz≦fout≦9.36MHz
9.36MHz<fout≦15.6MHz
15.6MHz<fout≦24.96MHz
24.96MHz<fout≦98.98MHz
100ps/300ps
Definition of Jitters
1.
Cycle to cycle jitter: The variation in cycle time of a single between adjacent cycles, over a random sample
of adjacent cycle pairs.
1/2VDD
CLKOUT
tcycle n
CCJ = | tcyclen -
tcycle n+1
tcyclen+1 | : where tcycle n and tcyclen+1 are any two adjacent cycles measured on controlled
edges.
2. Long term jitter: 1000Cycles after oscilloscope trigger.
LTJ
CLKOUT
Vref
1000 cycles
MS1257-E-01
Aug-11
-5-
AK8125AV
Frequency Characteristics
All specifications at VDD: over 3.0 to 3.6V, Ta:-40 to 85℃, Output Frequency: over specified frequency,
unless otherwise noted
Term
Input range
Pins
XIN
MIN
6.10
7.80
9.36
12.48
15.60
18.72
TYP
24.96
31.20
37.44
Modulation
Frequency
Output
CKOUT
Modulation
CKOUT
Average
Modulation
Frequency
(
)
Offset *3
@Down Spread
MAX
8.32
10.40
12.48
16.64
20.80
24.96
33.28
41.60
49.92
CKOUT
CKOUT
Unit
MHz
kHz
-
1
2
4
-0.25
-0.5
-1.5
-3.0
OFF
±0.125
±0.25
-
-
±0.75
±1.5
-0.18
-0.36
-0.90
-1.68
-0.19
-0.38
-0.91
-1.68
-0.20
-0.36
-
%
%
-0.92
-1.68
(*1)
Pin Setting
F_SEL[1:0]=LL
F_SEL[1:0]=LM
F_SEL[1:0]=LH
F_SEL[1:0]=ML
F_SEL[1:0]=MM
F_SEL[1:0]=MH
F_SEL[1:0]=HL
F_SEL[1:0]=HM
F_SEL[1:0]=HH
(*1)
OUTMPX=L
OUTMPX=M
OUTMPX=H, (*2)
SS_SEL[1:0]=LL
SS_SEL[1:0]=LM
SS_SEL[1:0]=LH
SS_SEL[1:0]=ML
SS_SEL[1:0]=MM
SS_SEL[1:0]=MH
SS_SEL[1:0]=HL
SS_SEL[1:0]=HM
SS_SEL[1:0]=HH
SS_SEL[1:0]=LL, F_SEL0=L
SS_SEL[1:0]=LM, F_SEL0=L
SS_SEL[1:0]=LH, F_SEL0=L
SS_SEL[1:0]=ML, F_SEL0=L
SS_SEL[1:0]=LL, F_SEL0=M
SS_SEL[1:0]=LM, F_SEL0=M
SS_SEL[1:0]=LH, F_SEL0=M
SS_SEL[1:0]=ML, F_SEL0=M
SS_SEL[1:0]=LL, F_SEL0=H
SS_SEL[1:0]=LM, F_SEL0=H
SS_SEL[1:0]=LH, F_SEL0=H
SS_SEL[1:0]=ML, F_SEL0=H
Modulation frequency is determined by input frequency range.
Following equations provide the theoretical modulation frequency of AK8125AV.
Fmod = 40kHz x (Input Frequency / Max Range Frequency)
Example) @10MHz Input:
(*2)
(*3)
Fmod = 40kHz x (10.0MHz/10.4MHz) = 38.46kHz
Please use 4x setting under output frequency 99.84MHz or less.
The average output frequency in the mode of down spread modulation is intentionally offset against the
ideal average frequency.
Aug-11
MS1257-E-01
-6-
AK8125AV
Spread Spectrum Modulation Selection
The modulation ration are selectable by pin setting of SS_SEL[1:0] (Pin 7 and 4), as defined in Table1.
Table 2: Modulation Ratio Setting
SS_SEL[1:0]
1
0
L
L
L
M
L
H
M
L
M
M
M
H
H
L
H
M
H
H
Spread Mode
-0.25%
-0.5%
-1.5%
-3.0%
SS Off
±0.125%
±0.25%
±0.75%
±1.5%
Operation frequency Range Selection
The operation frequency range are selectable by pin setting of F_SEL[1:0] (Pin 9 and 2), as defined in
Table3.
Table 3: Operation Frequency Table
F_SEL[1:0]
Input Range
Output Range
(OUTMPX=”L)
Output Range
(OUTMPX=”M”)
Output Range
(OUTMPX=”H”)
1
L
0
L
6.1 - 8.32MHz
6.1 - 8.32MHz
12.2 – 16.64MHz
24.4 – 33.28MHz
L
M
7.80 - 10.40MHz
7.80 - 10.40MHz
15.60 - 20.80MHz
31.20 – 41.60MHz
L
H
9.36 - 12.48MHz
9.36 - 12.48MHz
18.72 – 24.96MHz
37.44 – 49.92MHz
M
L
12.48 - 16.64MHz
12.48 - 16.64MHz
24.96 – 33.28MHz
49.92 – 66.56MHz
M
M
15.60 - 20.80MHz
15.60 - 20.80MHz
31.20 – 41.60MHz
62.40 – 83.20MHz
M
H
18.72 - 24.96MHz
18.72 - 24.96MHz
37.44 – 49.92MHz
74.88 – 99.84MHz
H
L
24.96 - 33.28MHz
24.96 - 33.28MHz
49.92 – 66.56MHz
-
H
M
31.20 - 41.60MHz
31.20 - 41.60MHz
62.40 – 83.20MHz
-
H
H
37.44 - 49.92MHz
37.44 - 49.92MHz
74.88 – 99.84MHz
-
MS1257-E-01
Aug-11
-7-
AK8125AV
Package Information
· Mechanical data
0 ~ 10°
2.9 ± 0.2
+0.1
0.127 -0.05
5
0.2 ± 0.1
+0.1
0.1 -0.05
1.0
MAX
0.5
0.55 ± 0.2
2.8 ± 0.2
1
4.0 ± 0.2
6
10
Unit: mm
· Marking
10
b
6
d
c
AKM
AKM
125AV
8126
XXX
XXX
a
1
a:
b:
c:
d
#1 Pin Index
Part number
Date code (3 digits)
(1)
Product Family Logo
5
· RoHS Compliance
All integrated circuits form Asahi Kasei Microdevices Corporation (AKM)
assembled in “lead-free” packages* are fully compliant with RoHS.
(*) RoHS compliant products from AKM are identified with “Pb free” letter indication on
product label posted on the anti-shield bag and boxes.
Aug-11
MS1257-E-01
-8-
AK8125AV
IMPORTANT NOTICE
l These products and their specifications are subject to change without notice.
When you consider any use or application of these products, please make inquiries the
sales office of Asahi Kasei Microdevices Corporation (AKM) or authorized distributors
as to current status of the products.
l Descriptions of external circuits, application circuits, software and other related
information contained in this document are provided only to illustrate the operation and
application examples of the semiconductor products. You are fully responsible for the
incorporation of these external circuits, application circuits, software and other related
information in the design of your equipments. AKM assumes no responsibility for any
losses incurred by you or third parties arising from the use of these information herein.
AKM assumes no liability for infringement of any patent, intellectual property, or other
rights in the application or use of such information contained herein.
l Any export of these products, or devices or systems containing them, may require an
export license or other official approval under the law and regulations of the country of
export pertaining to customs and tariffs, currency exchange, or strategic materials.
l AKM products are neither intended nor authorized for use as critical componentsNote1) in
any safety, life support, or other hazard related device or systemNote2), and AKM
assumes no responsibility for such use, except for the use approved with the express
written consent by Representative Director of AKM. As used here:
Note1) A critical component is one whose failure to function or perform may reasonably be expected to
result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system
containing it, and which must therefore meet very high standards of performance and reliability.
Note2) A hazard related device or system is one designed or intended for life support or maintenance of
safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to
function or perform may reasonably be expected to result in loss of life or in significant injury or damage
to person or property.
l It is the responsibility of the buyer or distributor of AKM products, who distributes,
disposes of, or otherwise places the product with a third party, to notify such third party
in advance of the above content and conditions, and the buyer or distributor agrees to
assume any and all responsibility and liability for and hold AKM harmless from any and
all claims arising from the use of said product in the absence of such notification.
MS1257-E-01
Aug-11
-9-
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