AK8135F Low Power Multiclock Generator with VCFS AK8135F Features Description AK8135F is a member of AKM’s low power multi clock generator family designed for Recorders, DTVs or STBs, requiring a range of system clocks with high performance. AK8135F generates different frequency clocks from a 24.576MHz crystal oscillator and provides them to seven outputs. The on-chip VCFS (Voltage Controlled Frequency Synthesizer) accepts a voltage control input to allow the output clocks to vary by ±85 ppm for synchronizing to the external clock system. Both circuitries of VCFS and PLL in AK8135F are derived from AKM’s long-term-experienced clock device technology, and enable clock output to perform low jitter and to operate with very low current consumption. AK8135F is available in a 30-pin VSOP package. 24.576MHz Crystal Input One 24.576MHz-Reference Output Selectable Clock out Frequencies: - 24.576 MHz at CLK1 - 24.99972 MHz at CLK2 - 33.332965 MHz at CLK3 - 27.000 MHz at REF1-4 Built-in two VCFS - Pull Range: ±85ppm (typ.) Low Jitter Performance - Period Jitter: 150 psec (Typ.) at CLK1-3, REF1-4 - Long term jitter: 400 psec (Typ.) at CLK1-3, REF1-4 Low Current Consumption: 24 mA (Typ.) at 3.3V Low C/N output: 72 dB (Typ.) at REF1-4 Supply Voltage: 3.0 – 3.6V Operating Temperature Range: -20 to +85℃ Package: 30-pin VSOP (Lead free) Applications HDD, DVD, BD Recorder DTV Set-Top-Boxes VDD1-6 CLK1 XI Crystal PLL1 OSC 1/16 CLK2 1/12 CLK3 XO REF1 REF2 VCFS1 VIN1 REF1PD REF3 REF4 VCFS2 VIN2 REF34PD VDD REF34PD VDD REF1PD REF34PD TEST1 TEST4 TEST2 TEST3 GND1-7 Figure 1: AK8135F Multi Clock Generator MS1181-E-02 Feb-11 -1- AK8135F Pin Descriptions 1:XO 30:GND1 2:TEST1 29:VDD1 3:XI 28:VIN1 4:TEST2 27:VIN2 5:CLK1 26:TEST3 6:REF1PD 25:VDD2 7:VDD4 24:GND2 8:GND4 23:REF1 9:REF3 22:VDD3 10:GND5 21:GND3 11:VDD5 20:REF2 12:REF4 19:REF34PD 13:GND7 VIN1 14:CLK2 18:TEST4 15:CLK3 16:GND6 17:VDD6 Figure 2: Package: 30-Pin VSOP(Top View) Feb-11 MS1181-E-02 -2- AK8135F Pin No. Pin Name Pin Type Description 1 XO AO Crystal connection, Connect to 24.576MHz crystal 2 TEST1 DI TEST input pin, Connect to GND. 3 XI AI Crystal connection, Connect to 24.576MHz crystal 4 TEST2 DI TEST input pin, Connect to GND. 5 CLK1 DO Reference Clock Output of XO based on 24.576MHz Crystal 6 REF1PD DI 7 VDD4 PWR Power Supply 4 8 GND4 PWR Ground 4 REF1 pin Mode Select pin “H”: Enable, REF1 pin outputs 27.00MHz. (1) “L”: Disable, REF1 pin is “L”. Reference Clock Output 3 from VCFS2 9 REF3 When REF34PD pin = “H”, Output frequency is 27.00MHz. DO When REF34PD pin = “L”, this pin is “L” output. 10 GND5 PWR Ground 5 11 VDD5 PWR Power Supply 5 12 REF4 DO Reference Clock Output 4 from VCFS2 When REF34PD pin = “H”, Output frequency is 27.00MHz. When REF34PD pin = “L”, this pin is “L” output. 13 GND7 PWR Ground 7 14 CLK2 DO Clock output 2, Output frequency is 25.000MHz. 15 CLK3 DO Clock output 3, Output frequency is 33.333MHz. 16 GND6 PWR Ground 6 17 VDD6 PWR Power Supply 6 18 TEST4 DO 19 REF34PD DI 20 REF2 DO 21 GND3 PWR Ground 3 22 VDD3 PWR Power Supply 3 23 REF1 DO TEST output pin, this pin is “L” output and should be open. REF3 and REF4 pins Mode Select pin, VCFS2 Power Down pin “H”: Enable, REF3 and REF4 pins output 27.00MHz and VCFS2 is Normal Operation. “L”: Disable, REF3 and REF4 pins are “L” and VCFS2 is powered down. Reference Clock Output 2 from VCFS1, Output frequency is 27.00MHz. Reference Clock Output 1 from VCFS1 When REF1PD pin = “H”, Output frequency is 27.00MHz. When REF1PD pin = “L”, this pin is “L” output. 24 GND2 PWR Ground 2 25 VDD2 PWR Power Supply 2 26 TEST3 DI TEST input pin, Connect to GND. 27 VIN2 AI VCFS2 Control Voltage Input 28 VIN1 AI VCFS1 Control Voltage Input 29 VDD1 PWR Power Supply 1 30 GND1 PWR Ground 1 (1) Internal pull up 52k Ordering Information Part Number Marking Shipping Packaging Package Temperature Range AK8135F AK8135F Tape and Reel 30-pin VSOP -20 to 85℃ MS1181-E-02 Feb-11 -3- (1) AK8135F Absolute Maximum Rating Over operating free-air temperature range unless otherwise noted Items Symbol (1) Ratings Unit Supply voltage VDD -0.3 to 4.6 V 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 Supply voltage (1) Symbol Conditions Ta VDD Min Typ -20 Pin: VDD1-6 3.0 3.3 Max Unit 85 C 3.6 V Note: (1) Power to VDD1-6 requires to be supplied from a single source. should be installed close to each VDD pin. Feb-11 A decoupling capacitor for power supply line MS1181-E-02 -4- AK8135F DC Characteristics VDD: over 3.0 to 3.6V, Ta: -20 to +85℃, 27MHz Crystal, unless otherwise noted Parameter Symbol Conditions High Level Input Voltage VIH Pin: REF1PD, REF34PD, TEST1-3 Low Level Input Voltage VIL Pin: REF1PD, REF34PD, TEST1-3 Input Current 1 IL 1 Pin: TEST1-3 Input Current 2 IL 2 Input Current 3 IL 3 Input Current 4 IL 4 High Level Output Voltage VOH Low level Output Voltage VOL Current Consumption 1 IDD1 Current Consumption 2 IDD2 Current Consumption 3 IDD3 Current Consumption 4 IDD4 Pin: REF1PD, REF34PD VIH=VDD Pin: REF1PD, REF34PD VIL=GND Pin: VIN1, VIN2 Pin: CLK1-3, REF1-4 IOH=-4mA MIN TYP 0.7VDD 0.3VDD V -10 +10 μA -10 +10 μA -25 μA +3 μA -134 -58 -3 0.8VDD V 0.2VDD V 24 32 mA 23 31 mA 17 22 mA 16 21 mA IOL=+4mA REF1PD=’H’, REF34PD=’H’ No load REF1PD=’L’, REF34PD=’H’ No load REF1PD=’H’, REF34PD=’L’ No load REF1PD=’L’, REF34PD=’L’ MS1181-E-02 Unit V Pin: CLK1-3, REF1-4 No load MAX Feb-11 -5- AK8135F AC Characteristics VDD: over 3.0 to 3.6V, Ta: -20 to +85℃, 27MHz Crystal, unless otherwise noted Parameter Symbol Crystal Clock Frequency Output Clock Accuracy (1) (1) Fosc Faccuracy VCFS Pullable Range PRVCFS VCFS Response Time RTVCFS C/N CN Output Clock Rise Time 1 T_rise1 Output Clock Fall Time 1 T_fall1 Output Clock Rise Time 2 T_rise2 Output Clock Fall Time 2 T_fall2 Period Jitter (2) Jit_period Long Term Jitter (2) Output Clock Duty Cycle Power-up Time (3) Jit_long DtyCyc T_put Conditions MIN Pin:XI,XO Pin:CLK1 24.576MHz Crystal CL=10[pF] Pin:CLK2 24.99972MHz Relative to 25.000MHz Crystal CL=10[pF] Pin:CLK3 33.332965MHz Relative to 33.333MHz Crystal CL=10[pF] Pin:REF1-4 27.000MHz VIN1/VIN2=0.5VDD Crystal CL=10[pF] Pin:REF1-4 VIN1/VIN2=0.5VDD±1.0 Pin:REF1-4 VIN1/VIN2=0.5VDD±1.0 Pin:REF1-4 with Load Cpl2=25pF Pin:CLK1, CLK2 with Load Cpl1=15pF 0.2VDD → 0.8VDD Pin:CLK1, CLK2 with Load Cpl1=15pF 0.8VDD → 0.2VDD Pin:CLK3, REF1-4 with Load Cpl2=25pF 0.2VDD → 0.8VDD Pin:CLK3, REF1-4 with Load Cpl2=25pF 0.8VDD → 0.2VDD Pin:CLK1, CLK2 with Load Cpl1=15pF Pin:CLK3, REF1-4 with Load Cpl2=25pF Pin:CLK1, CLK2 with Load Cpl1=15pF 1000 cycle delay Pin:CLK3, REF1-4 with Load Cpl2=25pF 1000 cycle delay Pin:CLK2 with Load Cpl1=15pF Pin:CLK3, REF1-4 with Load Cpl2=25pF Pin: CLK1 with Load Cpl1=15pF Pin:CLK1, CLK2 with Load Cpl1=15pF Pin:CLK3, REF1-4 with Load Cpl2=25pF TYP MAX 24.576 Unit MHz -30 0 +30 ppm -41 -11 +19 ppm -41 -11 +19 ppm -30 0 +30 ppm ±65 ±85 ±115 ppm 5 20 ppm/100ms 72 dB 1.5 4.0 ns 1.5 4.0 ns 2.5 4.0 ns 2.5 4.0 ns 150 (6σ) 300 (6σ) ps 400 (6σ) 600 (6σ) ps 45 50 55 % 40 50 60 % 1 2 ms (1) Output Clock Accuracy depends on crystal characteristics, on-chip load capacitance, and stray capacity of PCB. MIN., Max.=±30ppm is applied to AKM’s authorized test condition. Please contact us when you plan the use of other crystal unit. (2) ±3 in 10000 sampling or more (3) Time to settle output into 0.1% of specified frequency. Feb-11 MS1181-E-02 -6- AK8135F Function Description Voltage Controlled Frequency Synthesizer (VCFS) AK8135F has a voltage controlled frequency synthesizer (VCFS), featuring fine frequency tuning for 27MHz of primary clock frequency by external DC voltage control. This tuning enables output clock frequency to synchronize the external clock system. VCFS is composed of analog-to-digital converter and high resolution PLL as shown in Figure 3. VIN1 (Pin28) and VIN2 (Pin27) accept DC voltage control from a processor or a system controller, and pulls the primary frequency of crystal to higher or lower. This pulling range is determined by supply Voltage to AK8135F. AK8135F is designed to range ±85ppm of primary frequency, and the typical pulling profile is shown in Figure 4. External LPF AK8135F PWM VIN1/2 High-resolution ADC+FLT REF1-4 PLL VCFS1/2 REF1-4 Frequency [ppm] Figure 3: VCFS Diagram +85 0 (27[MHz]) -85 0.5 0.5VDD-1.0 0.5VDD 0.5VDD+1.0 VDD-0.5 VIN1/VIN2 Input Voltage [V] Figure 4: Typical VCFS Pulling Profile MS1181-E-02 Feb-11 -7- AK8135F Typical Connection Diagram VDD=3.3[V] + C7 GND AK8135F Cext2 1:XO X’tal = 24.576[MHz] 2:TEST1 29:VDD1 3:XI 28:VIN1 4:TEST2 27:VIN2 5:CLK1 26:TEST3 RLPF1 C1 Cext1 PWM1 CLPF1 CLPF2 RLPF2 CLPF3 CLPF4 CLK1 = 24.576[MHz] PWM2 6:REF1PD 25:VDD2 SW1 C4 REF3 = 27.000[MHz] C5 REF4 = 27.000[MHz] CLK2 = 24.99972[MHz] 7:VDD4 24:GND2 8:GND4 23:REF1 9:REF3 22:VDD3 10:VDD4 10:GND5 21:GND3 S 11:VDD5 S4 12:REF4 20:REF2 13:GND7 18:TEST4 14:CLK2 VIN1 17:VDD6 15:CLK3 16:GND6 C2 REF1 = 27.000[MHz] C3 REF2 = 27.000[MHz] 19:REF34PD CLK3 = 33.332965[MHz] SW2 C6 GND Figure 5: Typical Connection Diagram C1, C2, C3, C4, C5, C6: 0.1μF C7 : Electrolytic capacitor Cext1, Cext2: Depends on crystal characteristics. Refer the specification of the crystal. SW1, SW2: It is a switch that controls outputs of REF1, REF3 and REF4 and power up/down of VCFS2. RLPF1, RLPF2, CLPF1, CLPF2, CLPF3, CLPF4: In case of interface by PWM. For right configuration, refer the specification of the applied processor. Feb-11 MS1181-E-02 -8- AK8135F PCB Layout Consideration AK8135F is a high-accuracy and low-jitter multi clock generator. For proper performances specified in this datasheet, careful PCB layout should be taken. The followings are layout guidelines based on the typical connection diagram shown in Figure 5 Power supply line – AK8135F has six power supply pins (VDD1-6) which deliver power to internal circuitry segments. A 0.1F decoupling capacitor should be placed as close to each VDD pin as possible. Ground pin connection – AK8135F has seven ground pins (GND1-7). These pin require connecting to plane ground which will eliminate any common impedance with other critical switching signal return. 0.1F decoupling capacitors placed at VDD1, VDD2, VDD3, VDD4, VDD5, VDD6, and VDD7 should be grounded at close to the GND1pin, the GND2 pin, the GND3 pin, the GND4 pin, the GND5 pin, the GND6 pin, and the GND7 respectively. Crystal connection – Proper oscillation performance is susceptible to stray or parasitic capacitors around crystal. The wiring traces to a crystal form XI (Pin 3) and XO (Pin 1) have equal lengths with no via and as short in length as possible. These traces should be also located away from any traces with switching signal. MS1181-E-02 Feb-11 -9- AK8135F Package Information Marking a: #1 Pin Index b: Part number c: Date code (5 digits) 30 16 b AK8135F xxxxx c a 15 1 Feb-11 MS1181-E-02 - 10 - AK8135F 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. 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 Microdevices Corporation (AKM) or authorized distributors as to current status of the products. 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. 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. AKM products are neither intended nor authorized for use as critical components Note1) 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. 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. MS1181-E-02 Feb-11 - 11 -