AK8122V

ASAHI KASEI EMD CORPORATION
Differential Zero Delay
Clock Buffer
AK8122
Features
Description
Operational Frequency Range:
160MHz – 400MHz
Output delay:
-30 ±100ps
Low Jitter Performance:
The AK8122 is a high performance differential zero
delay clock buffer IC with Phase Locked Loop
(PLL). Target application is DDR2 SDRAM and
characteristics of these ICs are acceptable to
standards of JEDEC.
20 ps (Period RMS 190 – 360MHz)
30 ps (cycle – cycle RMS 190 – 360MHz)
70 ps (Half Period RMS 190 – 250MHz)
60 ps (Half Period RMS 250 – 300MHz)
40 ps (Half Period RMS 300 – 360MHz)
Applications
Supply Voltage:
1.8 ±0.1V
Operating Temperature Range:
-20 to +85℃ : AK8122E
DDR2 SDRAM Clock Buffer
-40 to +85℃ : AK8122V
Package:
8-pin MSOP(Lead Free)
Block Diagram
TSTI
(VSS)
TSTO
(VDD)
BIAS
CLKP
CLKN
FBINP
P
C
L
V
F
P
P
C
F
O
C
OUTP
1/2
VSS
OUTN
VDD
FBINN
AK8122 Differential Zero Delay Clock Buffer
MS0971-E-00
Dec-10
-1-
The brand name
of AKEMD’s IC’s
AK8122
Pin Descriptions
TSTI
CLKP
1
2
CLKN
3
7
6
TSTO
OUTP
OUTN
5
VDD
8
VSS
Pin
No.
Pin
Name
1
TSTI
Package: 8-Pin MSOP (Top View)
Pin
Type
IN
Description
IC Test pin (Input)
(1)
Please tie VSS to this pin.
2
CLKP
IN
Differential Clock Input (Positive)
3
CLKN
IN
Differential Clock Input (Negative)
4
VSS
--
Ground
Power Supply
5
VDD
--
6
OUTN
OUT
Differential Clock Output (Negative)
(2)
7
OUTP
OUT
Differential Clock Output (Positive)
(2)
8
TSTO
OUT
IC Test pin (Output)
(3)
Please tie VDD to this pin.
(1) Internal pull down 100kΩ (Typ.)
(2) Output will be “L” level If CLKP = CLKN = ”L”. Output clock frequency will be lower than 400MHz if CLKP and
CLK N are fixed as ”H” and ”L” (or ”L” and CLKN=”H”), respectively. Setting CLKP = CLKN = ”H” is prohibited.
(3) Output status is Hi-z for normal operation.
Ordering Information
Part Number
Marking
Shipping Packaging
Package
Temperature
Range
AK8122V
122V
Tape and Reel
8-pin MSOP
-40 to 85 ℃
AK8122E
122E
Tape and Reel
8-pin MSOP
-20 to 85 ℃
Mar-09
MS0971-E-00
-2-
The brand name
of AKEMD’s IC’s
AK8122
Absolute Maximum Rating
Over operating free-air temperature range unless otherwise noted
Items
(1)
Symbol
Supply Voltage
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. AKEMD recommends that this device is handled with
appropriate precautions.
Recommended Operation Conditions
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Operating Temperature 1
Ta1
-40
85
°C
Operating Temperature 2
Ta2
-20
85
°C
Supply Voltage
VDD
1.7
1.9
V
400
MHz
Input Frequency
160
High Level Input Voltage
VIH
Pin: CLKP, CLKN
Low Level Input Voltage
VIL
Pin: CLKP, CLKN
DC Differential Input Voltage
VIDC
Pin: CLKP, CLKN
0.3
AC Differential Input Voltage
VIAC
Pin: CLKP, CLKN
Differential Input
Reference Voltage
Input Slew Rate
1.8
0.65VDD
V
0.35VDD
V
0.6
VDD -0.4
Vpp
VIREF
0.5VDD
-0.15
0.5VDD
+0.15
V
ISR
1
4
V/ns
MS0971-E-00
V
Dec-10
-3-
The brand name
of AKEMD’s IC’s
AK8122
DC Characteristics
All specifications at VDD: over 1.7 to 1.9V, Ta=Ta1(AK8122V) Ta=Ta2(AK8122E)
Parameter
Conditions
MIN
IL
Pin: CLKP, CLKN
VOREF
Pin: OUTP, OUTN
Symbol
Input Current
Differential Output
Reference Voltage
AC Differential Output Voltage
(1)
VOAC
High Level Output Voltage
VOH
Low Level Output Voltage
VOL
MAX
Unit
-10
+10
μA
0.5VDD
-0.1
0.5VDD
+0.1
V
0.5
VDD-0.4
V
Pin: OUTP, OUTN
Output Load: Fig.1
Pin: OUTP, OUTN
TYP
VDD
-0.1
IOH=-1mA
V
Pin: OUTP, OUTN
0.1
IOL=+1mA
V
Input Load Capacitance
Pin: CLKP, CLKN
2.1
pF
Input Load Capacitance error
Pin: CLKP, CLKN
0.1
pF
50
mA
Current Consumption
(1)
IDD
(2)
(1) See Fig.8 for output load reference.
(2) Output impedance of 60-ohm. No load. VDD = 1.8V, Ta = 25.
AC Characteristics
All specifications at VDD: over 1.7 to 1.9V, Ta: -20 to +85℃, unless otherwise noted
Parameter
Symbol
Conditions
MIN
Output Frequency
Output Slew Rate
(5)
Input Clock Duty Cycle
Delay Time
SFO + DFO + SKEW
250MHz-400MHz
(1)
Jit 1
Jit 2
Output Clock Jitter
Jit 3
Jit 4
Jit 5
Start up Time
(6)
Period, 1σ, 190–360MHz
(2)
Cycle-to-cycle, 1σ, 190–360MHz
(3)
TYP
MAX
Unit
160
400
MHz
1
3
V/ns
%
40
50
60
-130
-30
+70
ps
20
ps
30
ps
Half Period, 1σ, 190–250MHz
(4)
70
ps
Half Period, 1σ, 250–300MHz
(4)
60
ps
Half Period, 1σ, 300–360MHz
(4)
40
ps
200
us
tlock
(1) See Fig.1.
(2) See Fig.2.
(3) See Fig.3.
(4) See Fig.4.
(5) See Fig.8.
(6) A provisional target value.
Mar-09
MS0971-E-00
-4-
The brand name
of AKEMD’s IC’s
AK8122
Standards of Jitter
Fig.1 Delay (Static Phase Offset + Skew) : Tdly = ΣTdly/N
Fig.2 Period jitter: Tpj = Tcycn – 1/f0
Fig.3 Cycle to cycle jitter: Tc2cj=Tcn-Tcn+1
Fig.4 Half period jitter: Thpj = Thp – 1/2*f0
Fig.5 Input and Output Slew Rate
MS0971-E-00
Dec-10
-5-
The brand name
of AKEMD’s IC’s
AK8122
Measurement Condition
VDD
VCKp
R=30Ω
R=30Ω
VDD/2
VCKn
GND
Fig.6 IBIS Model Output Load
VDD/2
-VDD/2
10pF
Z=25Ω
Z=30Ω
R=5Ω
R=25Ω
GND
Z=25Ω
Z=30Ω
R=5Ω
R=25Ω
GND
10pF
-VDD/2
-VDD/2
Fig.7 Output Load Test Circuit 1
VDD
10pF
GND
Z=30Ω
R=1MΩ
1pF
R=60Ω
GND
Z=30Ω
10pF
R=1MΩ
GND
1pF
GND
GND
Fig.8 Output Load Test Circuit 2
Mar-09
MS0971-E-00
-6-
The brand name
of AKEMD’s IC’s
AK8122
Assumed Power Up Sequence
MS0971-E-00
Dec-10
-7-
The brand name
of AKEMD’s IC’s
AK8122
Package Information
• Mechanical data
• Marking
8
8
5
b
122E
YMA
b
122V
YMA
c
a
5
c
a
1
4
a:
b:
c:
4
#1 Pin Index
Part number
Date code (3 digits)
• RoHS Compliance
All integrated circuits form Asahi Kasei EMD Corporation (AKEMD) assembled in
“lead-free” packages* are fully compliant with RoHS.
(*) RoHS compliant products from AKEMD are identified with “Pb free” letter indication on
product label posted on the anti-shield bag and boxes.
Mar-09
MS0971-E-00
-8-
The brand name
of AKEMD’s IC’s
AK8122
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 EMD Corporation (AKEMD) or authorized distributors as to current status of the products.
l AKEMD assumes no liability for infringement of any patent, intellectual property, or other rights in the
application or use of any 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 AKEMD products are neither intended nor authorized for use as critical components Note1) in any safety, life
support, or other hazard related device or system Note2), and AKEMD assumes no responsibility for such use,
except for the use approved with the express written consent by Representative Director of AKEMD. 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 AKEMD 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 AKEMD harmless from any and all claims arising from the use of said product in the absence of such
notification.
MS0971-E-00
Dec-10
-9-
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