ASAHI KASEI EMD CORPORATION Evaluation Board for AK8130 AKD8130 Ordering guide Description The AKD8130 is an evaluation board for AK8130 clock generator family. Therefore, it is easy to evaluate the jitters and VCXO performance. 4 types of boards are prepared depending on crystal foot pattern. AKD813X_C X: Device type 0:AK8130 0A:AK8130A 0B:AK8130B C: Crystal type N: Non Crystal A: 49 Surface mount type B: 5032 2 terminal C: 3025 2 terminal D: 3225 4 terminal Block Diagram AK8130 Evaluation Board VDD VSS CLK1 CLK2 VIN1.65V AK8130 CLK3 VDD CLK4 REFOUT AK8145miniBoard AK8142 AK811x CLK1 PIC AK8142 AKD0598-E-00 CLK2 Jan-08 -1- The brand name of AKEMD’s IC’s AKD8130 Functions 3.PWM Filter 3. VIN Direct Input 5.Crystal Unit 1.Power 2.DIPSW 6.AK811x 4.Dummy Capacitors Figure 1. AKD8130 top view 1. Power Supply Please connect the lead line to VDDPAD (3V) and VSSPAD (GND). 2. DIPSW Setting DISPSW6-10 are connected to the mode setting pins of AK8130 and AK811x. If these pins are controlled with general-purpose port, microprocessor or other methods, please keep these pins “open”. SWｎ SWｎ VDD （HIGH） OPEN Table1.1 SW SW6 SW7 SW8 SW9 SW10 SWｎ GND （LO） Connect to: AK8130 Pin2 AK8130 Pin3 AK8130 Pin14 AK811x Pin5 AK811x Pin4 Jan-08 AKD0598-E-00 -2- The brand name of AKEMD’s IC’s AKD8130 3. Smoothing filter for PWM signal There are patterns to configure a passive smoothing filter for PWM signal which is supplied to control the oscillation frequency of VCXO. It is necessary to mount resistor and condenser on these patterns and also input PWM signal between VIN and VSS12 pins when this filter is employed. It is also possible to control the voltage without using this filter. In this case, please input DC voltage directly to CN2 pin over VSS8 pin. 4. Dummy capacitor loads There are several dummy capacitor loads, C23 through C27. It is useful to measure clock performance or current consumption by loading capacitor which is virtually assumed in the system. It is important to take line capacitance into account and it is approximately 5pF. Consequently if there is 25pF capacitance assumed in the system, another 20pF capacitor needs to be mounted. Each clock outputs from AK8130 lead to J8 through J12. Chassis mount test jacks for miniature probe (Tektronix 131-0258-00) are available by mounting there. Table1.2 Jn/Cn J8/C8 J9/C9 J10/C10 J11/C11 J12/C12 5. Connect to: AK8130 Pin11 AK8130 Pin10 AK8130 Pin7 AK8130 Pin8 AK8130 Pin9 Quartz oscillator foot pattern There are 4 types of boards depending on quartz oscillator. VCXO is controlled its oscillation frequency by capacitance fluctuation of quartz oscillator. Therefore parasitic capacitance exists on the line pattern affects the oscillation performance. However in this board, ground patterns under quartz oscillator and Pin1/Pin16 is removed to minimize the unwanted affection. It is possible to check and tune characteristics of VCXO by using this board because those characteristics are adjustable by changing load capacitor, C17 and C18, to the suitable value. Please refer VCXO characteristic as a example. 6. AK811x foot pattern It is possible to mount AK811x series 1ch-PLL on this board. Jan-08 AKD0598-E-00 -3- The brand name of AKEMD’s IC’s AKD8130 Jitter measurement Device:AK8130B Condition: S2/S1/S0=HHH, Dummy capacitor=0pF Jan-08 AKD0598-E-00 -4- The brand name of AKEMD’s IC’s AKD8130 Pullable Range Profile tested Device:AK8130 27.0MHz VCXO Characteristics NDK AT-41CD2（CL=12.0pF） （Cext1=18.0pF,Cext2=5.0pF) 150 100 Δf(ppm) 50 0 -50 0 0.5 1 1.5 2 2.5 3 3.5 Parts Name Manufacture Parameter Motional inductance Motional capacitance Equivalent resｉstance Shunt capacitance Load capacitance＠27M L1 C1 R1 C0 CL Cext1 Cext2 C17 C18 AT-41CD2 NDK Unit mH 2 fF 17.3 Ω 8.7 pF 4.2 pF 12 -100 -150 VIN(V) 27.0MHz VCXO Characteristics NDK NX5032GA （CL=8.0pF） (Cext1=12.0pF, Cext2=1.0pF) 150.0 100.0 Δ ｆ(ppm) 50.0 0.0 0 0.5 1 1.5 2 2.5 3 3.5 -50.0 -100.0 -150.0 VIN(V) 27.0MHz VCXO Characteristics KDS SMD49 （CL=8.7pF） (Cext1=15.0pF, Cext2=1.0pF) 200.0 150.0 Δ ｆ(ppm) 100.0 50.0 0.0 -50.0 0 0.5 1 1.5 2 2.5 3 3.5 ｐF pF 18.0 5.0 Parts Name Manufacture Parameter Motional inductance Motional capacitance Equivalent resｉstance Shunt capacitance Load capacitance @27M NX5032GA NDK Unit mH 5.71 fF 6.09 Ω 10 pF 1.5 pF 8.0 L1 C1 R1 C0 CL Cext1 Cext2 C17 C18 ｐF pF Parts Name Manufacture Parameter Motional inductance Motional capacitance Equivalent resｉstance Shunt capacitance Load capacitance@ 27M L1 C1 R1 C0 CL SMD49 KDS Unit mH 4.4 fF 7.9 Ω 6.0 pF 1.8 pF 8.7 Cext1 Cext2 C17 C18 ｐF pF Parts Name Manufacture Parameter Motional inductance Motional capacitance Equivalent resｉstance Shunt capacitance Load capacitance@ 27M L1 C1 R1 C0 CL SMD49 KDS Unit mH 4.4 fF 7.9 Ω 6.0 pF 1.8 pF 10.0 Cext1 Cext2 C17 C18 ｐF pF 12.0 1.0 -100.0 -150.0 -200.0 VIN(V) SMD49 （CL:10.0pF） Cext1=10.0pF, Cext2=5.0pF 150.0 100.0 Δ ｆ(ppm) 50.0 0.0 0 0.5 1 1.5 2 2.5 3 3.5 -50.0 -100.0 -150.0 VIN(V) Jan-08 15.0 1.0 10.0 5.0 AKD0598-E-00 -5-