View AK8126_4460037.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ASAHI KASEI EMD CORPORATION
Spread Spectrum Clock Generator
AK8126
Features
Output Frequency Range: 16MHz - 128MHz Configurable Spread Spectrum Modulation:
-
Description
The AK8126 is a spread spectrum clock generator designed for Home AV applications where EMI elimination is seriously required. The device uses the AKEMD's original spread spectrum profile** to provide excellent EMI reduction effect without degradation of system performance. The AK8126 accepts a wide clock frequency range from a crystal or reference clock input, and provides a variable spread spectrum modulation selectable by pin-setting, allowing the device to use in most AV products easily. The device is available in a very small 10-pin TMSOP package, and its pin configuration offers simple PCB layout.
AKEMD's Original Spread Spectrum Profile Modulation Ratio:
Center Spread: 0.25%, 0.5%, 1.0%, 1.5% Down Spread: -0.5%, -1.0%, -2.0%, -3.0%
-
Modulation Frequency:
38.46KHz - 76.92KHz
Input Frequency Range:
- Crystal: 16MHz - 32MHz - Reference Clock Input : 16MHz - 128MHz
**: Patent pending
Low Jitter Performance:
100 ps (Max.) Cycle-to-cycle 1s
Applications
Digital TV Sets Display Panels Personal Video Recorders Set-Top-Boxes Multi Media Receivers
Low Current Consumption: 2.5mA (Typ.) at 16MHz, 3.3V Supply Voltage: 3.0 - 3.6V Operating Temperature Range: -10 to +85! Package: 10-pin TMSOP (Thin Miniature SOP )
Block Diagram
Crystal or Clock Input XIN
C1
* C2
required for Crystal input.
Crystal Oscillator XOUT S1 S0 Control Logic
PLL
with Spread Spectrum modulator
CKOUT
* Capacitors, C1 and C2 are
C/D/OFF FR1 FR0 VSS VDD
AK8126 Spread Spectrum Clock Generator
MS0548-E-01 -1-
Nov-07
AK8126
The brand name of AKEMD's IC's
Pin Descriptions
XIN XOUT VSS S1 S0 1 2 3 4 5 10 9 8 7 6 C/D/OFF FR1 FR0 VDD CKOUT
Package: 10-Pin TMSOP (Top View)
Pin No. 1 2 3 4 5 6 7 8 9 10
Pin Name XIN XOUT VSS S1 S0 CKOUT VDD FR0 FR1 C/D/OFF
Pin Type IN OUT -IN IN OUT -IN IN IN
Description Crystal Input or Reference Clock Input Crystal Output. Leave this pin floating when the external clock is used. Ground Spread Spectrum Modulation Ratio Select Pin1 Spread Spectrum Modulation Ratio Select Pin0 Clock Output Power Supply Clock Frequency Range Select Pin 0 Clock Frequency Range Select Pin 1 Spread Spectrum Modulation Mode Select Pin (2) (1) (3) (1) (1)
(1) Internal pull down 360kW (Typ.) (2) Internal pull up 360kW (Typ.) (3) 3-Level Input for Low/Mid/Hi. Biased at 1/2 of VDD with pull-up/down resistors of 360kW (Typ.).
Ordering Information
Part Number AK8126 Marking 8126 Shipping Packaging Tape and Reel Package 10-pin TMSOP Temperature Range -10 to 85 !
Nov-07 -2-
MS0548-E-01
The brand name of AKEMD's IC's
AK8126
Absolute Maximum Rating
Over operating free-air temperature range unless otherwise noted (1)
Items Supply Voltage Input Voltage Input Current (any pins except supplies) 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. Symbol VDD Vin IIN Tstg Ratings -0.3 to 4.6 VSS-0.3 to VDD+0.3 10 -55 to 130 Unit V V mA C
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 Operating Temperature Supply Voltage Input Clock Frequency (1) Symbol Ta VDD Fin 1 Fin 2 Cp1 Crystal External Reference Clock Input Output Frequency 16 - 67MHz Output Load Capacitance Note: (1) Frequency range to operate is required to select by pin-setting of S0 (Pin 5) and S1 (Pin 4). for the frequency range selection. See Table Output Frequency 67 -100MHz Output Frequency 100 - 128MHz Conditions Min -10 3.0 16 16 3.3 24 Typ Max 85 3.6 32 128 15 10 8 Unit C V MHz MHz pF pF pF
MS0548-E-01 -3-
Nov-07
AK8126
The brand name of AKEMD's IC's
DC Characteristics
All specifications at VDD: over 3.0 to 3.6V, Ta: -10 to +85! , Input Frequency: over 16MHz to 128MHz, unless otherwise noted Parameter High Level Input Voltage 1 Low Level Input Voltage 1 High Level Input Voltage 2 Low Level Input Voltage 2 Mid Level Input Voltage 2 High Level Input Voltage 3 Low Level Input Voltage 3 Input Current High Level Output Voltage Low Level Output Voltage Current Consumption Symbol VIH 1 VIL 1 VIH 2 VIL 2 VIM 2 VIH 3 VIL 3 IL VOH VOL Conditions Pin: S0,S1,FR0, FR1 Pin: S0,S1,FR0, FR1 Pin: C/D/OFF Pin: C/D/OFF Pin: C/D/OFF Pin: XIN Pin: XIN Pin: S0, C/D/OFF IOH=-4mA Pin: CLKOUT IOL=+4mA No load, Ta=25! IDD Spread Spectrum Mode (2) selection by note 2.5 mA S1, FR0, FR1, -20 0.8VDD 0.2VDD 0.45VD 08VDD 0.2VDD +20 0.8VDD 0.15VDD 0.50VD 0.55VDD MIN 08VDD 0.2VDD TYP MAX Unit V V V V V V V A V V
Pin: CLKOUT
(2) In the mode of center spread
AC Characteristics
All specifications at VDD: over 3.0 to 3.6V, Ta: -10 to +85! , Input Frequency: over 16MHz to 128MHz, unless otherwise noted Parameter Output Clock Duty Cycle Output Clock Rise Time Output Clock Fall Time Output Clock Jitter
(4)
Symbol
Conditions
MIN 40
TYP 50 1.2 1.2
MAX 60
Unit % ns ns
(4)
trise tfall Jit 1 Jit 2 Cycle-to-cycle 1s, 1x Cycle-to-cycle Peak-to-peak, 1x Power-up
(4)
100 600 5
ps ps ms
Output Lock Time(3)
tlock
(3) The time that output reaches the target frequency within accuracy of 0.1% from the point that the power supply reaches VDD (4) With the load capacitance specified by the recommended operation conditions
Nov-07 -4-
MS0548-E-01
The brand name of AKEMD's IC's
AK8126
Spread Spectrum Modulation Characteristics
All specifications at VDD: over 3.0 to 3.6V, Ta: -10 to +85! , Input Frequency: over 16MHz to 128MHz, unless otherwise noted Parameter Modulation Frequency(5) Modulation Ratio @ Center Spread Symbol fmod Ratio Selection Pin S[1:0]=LH Ratio Selection Pin S[1:0]=LL Ratio Selection Pin S[1:0]=HL Ratio Selection Pin S[1:0]=HH Ratio Selection Pin S[1:0]=LH Ratio Selection Pin S[1:0]=LL Ratio Selection Pin S[1:0]=HL Ratio Selection Pin S[1:0]=HH Ratio Selection Pin S[1:0]=LH Ratio Selection Pin S[1:0]=LL Ratio Selection Pin S[1:0]=HL Ratio Selection Pin S[1:0]=HH Conditions MIN 38.46 0.25 0.5 1.0 1.5 -0.5 -1.0 -2.0 -3.0 -0.36 -0.6 -1.2 -1.8 TYP MAX 76.92 Unit kHz
Mod C
%
Modulation Ratio @ Down Spread
Mod D
%
Average Modulation Frequency Offset(6) @ Down Spread
fmod-off
%
(5) Modulation frequency is determined by input frequency range. Following equations provide the theoretical modulation frequency of AK8126. Output Frequency Range 16-32MHz: 32-64MHz: 64-128MHz: 64-128MHz, x4 Output mode:
fmod(KHz) = 38.46KHz x fin(MHz) / 16MHz fmod(KHz) = 38.46KHz x fin(MHz) / 32MHz fmod(KHz) = 38.46KHz x fin(MHz) / 64MHz fmod(KHz) = 38.46KHz x fin(MHz) / 16MHz
Where, fin is an input frequency of crystal or reference clock input. (6) The average output frequency in the mode of down spread modulation is intentionally offset against the ideal average frequency. The offset is specified by percentage to the target output frequency as shown in Figure 1.
fmod-ave: Average Output Frequency
fmod-ideal: Frequency of 1/2 Modulation Ratio fo: Target Output Frequency
fmod-off: Average Frequency Offset Modulation Ratio
Figure 1: Offset in the mode of down spread modulation
MS0548-E-01 -5-
Nov-07
AK8126
The brand name of AKEMD's IC's
Operation Clock Frequency Range Selection
The AK8126 operates at a wide frequency rage to support clocking in most of Home AV products. The operation frequency range applying to the AK8126 is required to select by pin-setting of FR0 (Pin8) and FR1 (Pin9), as shown in Table 1.
Table 1: Operation Clock Frequency Setting
Pin Setting FR1 FR0 L L L H H L H H Input Frequency (MHz) 16 - 32 32 - 64 64 - 128 16 - 32 Output Frequency (MHz) 16 - 32 32 - 64 64 - 128 64 - 128 Input Frequency Scaling x1 x4 Applicable Input Crystal Clock
Spread Spectrum Modulation Selection
The AK8126 operates in two modes of spread spectrum modulation. One is "Center Spread Modulation" in which the frequency deviation from the target output frequency is equal to the lower side and the upper side. The other one is "Down Spread Modulation", which will be used in applications where the target clock is providing at a maximum frequency rate of that system. In this mode, the maximum spread frequency is equal to the target frequency, and the frequency deviation is provided in the lower side. The AK8126 can provide a variable modulation ratio with the AKEMD's original spread profile for both modulation modes, offering appropriate tune for EMI elimination without degradation of system performance. The modulation mode and the modulation ration are selectable by pin setting of C/D/OFF (Pin 10) and S[1:0] (Pin 4 and 5), as defined in Table 2 and Table 3, respectively.
.
Table 2: Spread Spectrum Modulation Mode Setting
Pin Setting C/D/OFF L M H Modulation Mode Down Spread No Modulation Center Spread
Table 3: Modulation Ratio Setting
Pin Setting S1 L L H H S0 L H L H Modulation Ratio (%) Center Spread Mode Down Spread Mode -1.0 0.5 - 0.5 0.25 -2.0 1.0 - 3.0 1.5
Nov-07 -6-
MS0548-E-01
The brand name of AKEMD's IC's
AK8126
Package Information * Mechanical data
2.9 0.2 10 6 0 ~ 10
2.8 0.2
4.0 0.2
1
0.5
5
+0.1 0.127 -0.05
0.2 0.1
+0.1 0.1 -0.05
1.0 MAX
Unit: mm
* Marking
10 6
b a
1
AKM AKM AKM 8126 XXX
8126 8126 XXX XXX
d c
a: b: c: d
#1 Pin Index Part number Date code (3 digits) Product Family Logo (1)
5
(1) AKM
is the brand name of AKEMD's IC's.
AKM and the logo -
- are the brand of AKEMD's IC's and identify that AKEMD continues to offer the best choice for high performance mixed-signal solution under this brand.
* 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.
MS0548-E-01 -7-
0.55 0.2
Nov-07
AK8126
The brand name of AKEMD's IC's
IMPORTANT NOTICE
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. AKEMD assumes no liability for infringement of any patent, intellectual property, or other rights in the application or use of any information contained herein. 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. AKEMD products are neither intended nor authorized for use as critical componentsNote1) in any safety, life support, or other hazard related device or systemNote2), 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.
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.
Nov-07 -8-
MS0548-E-01

▲Up To Search▲

Price & Availability of AK8126

	To Download AK8126 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .