ASAHI KASEI EMD CORPORATION Spread Spectrum Clock Generator AK8126 Description Features 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. Output Frequency Range: 16MHz – 128MHz Configurable Spread Spectrum Modulation: - 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: Applications 100 ps (Max.) Cycle-to-cycle 1s 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 ) Digital TV Sets Display Panels Personal Video Recorders Set-Top-Boxes Multi Media Receivers Block Diagram Crystal or Clock Input XIN Crystal Oscillator C1 *C2 XOUT C1 * Capacitors, and C2 are required for Crystal input. CKOUT with Spread Spectrum modulator S1 S0 PLL Control Logic C/D/OFF FR1 FR0 VSS VDD AK8126 Spread Spectrum Clock Generator MS0548-E-01 Nov-07 -1- The brand name of AKEMD’s IC’s AK8126 Pin Descriptions XIN XOUT VSS S1 1 2 10 9 3 8 7 FR0 VDD 6 CKOUT 4 5 S0 C/D/OFF FR1 Package: 10-Pin TMSOP (Top View) Pin No. Pin Name Pin Type 1 XIN IN 2 XOUT OUT 3 VSS -- Ground 4 S1 IN Spread Spectrum Modulation Ratio Select Pin1 (1) 5 S0 IN Spread Spectrum Modulation Ratio Select Pin0 (1) 6 CKOUT OUT Clock Output 7 VDD -- Power Supply 8 FR0 IN Clock Frequency Range Select Pin 0 (2) 9 FR1 IN Clock Frequency Range Select Pin 1 (1) 10 C/D/OFF IN Spread Spectrum Modulation Mode Select Pin (3) Description Crystal Input or Reference Clock Input Crystal Output. Leave this pin floating when the external clock is used. (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 Marking Shipping Packaging Package Temperature Range AK8126 8126 Tape and Reel 10-pin TMSOP -10 to 85 ℃ Nov-07 MS0548-E-01 -2- 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 Symbol Ratings Unit VDD -0.3 to 4.6 V Vin VSS-0.3 to VDD+0.3 V IIN ±10 mA Tstg -55 to 130 °C 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. 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) Output Load Capacitance Symbol Conditions Min Typ Max Unit Ta -10 85 °C VDD 3.0 3.3 3.6 V Crystal 16 24 32 MHz External Reference Clock Input 16 Fin 1 Fin 2 Cp1 128 MHz Output Frequency 16 – 67MHz 15 pF Output Frequency 67 –100MHz 10 pF Output Frequency 100 – 128MHz 8 pF 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. MS0548-E-01 See Table Nov-07 -3- The brand name of AKEMD’s IC’s AK8126 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 Symbol Conditions MIN High Level Input Voltage 1 VIH 1 Pin: S0,S1,FR0, FR1 Low Level Input Voltage 1 VIL 1 Pin: S0,S1,FR0, FR1 High Level Input Voltage 2 VIH 2 Pin: C/D/OFF Low Level Input Voltage 2 VIL 2 Pin: C/D/OFF Mid Level Input Voltage 2 VIM 2 Pin: C/D/OFF 0.45VD High Level Input Voltage 3 VIH 3 Pin: XIN 08VDD Low Level Input Voltage 3 VIL 3 Pin: XIN Input Current IL High Level Output Voltage VOH Low Level Output Voltage VOL Current Consumption IDD Pin: S0, C/D/OFF S1, TYP MAX Unit 08VDD V 0.2VDD 0.8VDD FR0, Pin: CLKOUT IOH=-4mA FR1, V V 0.15VDD V 0.50VD 0.55VDD V V -20 0.2VDD V +20 μA 0.8VDD V Pin: CLKOUT 0.2VDD IOL=+4mA V No load, Ta=25℃ 2.5 Spread Spectrum Mode (2) selection by note mA (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 Symbol Conditions (4) Output Clock Duty Cycle (4) Output Clock Rise Time (4) Output Clock Fall Time Output Clock Jitter TYP MAX Unit 40 50 60 % trise 1.2 ns tfall 1.2 ns Jit 1 Jit 2 Output Lock Time(3) MIN tlock Cycle-to-cycle 1s, 1x Cycle-to-cycle Peak-to-peak, 1x Power-up 5 100 ps 600 ps ms (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 MS0548-E-01 -4- 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 Symbol Modulation Frequency(5) Conditions MIN fmod Modulation Ratio @ Center Spread Mod C Modulation Ratio @ Down Spread Mod D Average Modulation Frequency Offset(6) @ Down Spread fmod-off TYP 38.46 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 MAX Unit 76.92 kHz ±0.25 ±0.5 ±1.0 ±1.5 -0.5 -1.0 -2.0 -3.0 -0.36 -0.6 -1.2 -1.8 % % % (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 ½ 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 Nov-07 -5- The brand name of AKEMD’s IC’s AK8126 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 MS0548-E-01 -6- The brand name of AKEMD’s IC’s AK8126 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 8126 XXX a 1 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 Nov-07 -7- The brand name of AKEMD’s IC’s AK8126 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 MS0548-E-01 -8-