ASAHI KASEI EMD CORPORATION Evaluation Board for AK8126 AKD8126 Description Ordering guide The AKD8126 is an evaluation board for spread spectrum clock generator, AK8126. Therefore, it is possible to evaluate spectrum characteristics and other performances. AKD8126 Block Diagram AK8126 Evaluation Board AKD0548-E-00 Jan-08 1 The brand name of AKEMD’s IC’s AKD8126 Functions Figure 1. AKD8126 top view 1. Power Supply Please connect the lead line to VDD (3.3V; Red) and VSS (GND; Black). 2. Clock input It is possible to input clock from SMA-A connector. 3. Matching resistor Matching resistor is mountable here if impedance matching is necessary. 4. Clock output Clock output from AK1526 leads to this connector. Spectrum Analyzer or Oscilloscope is available to measure clock performances by connecting here. Jan-08 AKD0548-E-00 2 The brand name of AKEMD’s IC’s AKD8126 5. DIPSW 5.1. Mode selection (C / D / OFF) Modulation mode is selected by setting this switch. L M H Table 5.1. Modulation mode setting C / D / OFF Mode L Down spread M Spread off H Center spread 5.2. Operation clock frequency range selection (FR1 / FR0) Operation frequency range is selected by setting this switch. L H FR1 FR0 Table 5.2. Operation clock frequency setting FR1 FR0 Input frequency range Output frequency range L L 16-32MHz 16-32MHz(1x) L H 32-64MHz 32-64MHz(1x) H L 64-128MHz 64-128MHz(1x) H H 16-32MHz 64-128MHz(4x) Note: AK8126 outputs a input frequency x 4, when FR1/FR0=”HH” is selected. 5.3. Modulation ratio selection Modulation ratio is selected by setting this switch. FR1 L H FR0 L H Table 5.3. Modulation ratio setting S1 S0 Center spread C / D / OFF = ”H” L L ±0.5% L H ±0.25% H L ±1.0% H H ±1.5% 6. Down spread C / D / OFF = ”L” -1.0% -0.5% -2.0% -3.0% Quartz oscillator foot pattern EPSON TOYOCOM (MA-406) or 49 lead type quartz oscillator is mountable. Jan-08 AKD0548-E-00 3 The brand name of AKEMD’s IC’s AKD8126 Example of spectrum measurement 51MHz, Center spread: ±1.0% Jan-08 AKD0548-E-00 4 E 100 VDD 2 SW4 1 VDD H27 HOLE10 1 CON3 VDD 2 D (Not Mount) C5 CAP_PIN 1 2 (Not Mount) C6 CAP_PIN 1 2 (Not Mount) H33 HOLE10 H31 HOLE10 H32 HOLE10 H34 HOLE10 H37 HOLE10 GND 1 HOLE03 H6 B 3 1 HOLE03 H9 XIN 1 XOUT 1 GND GND 1 S1 1 S0 1 2 3 4 5 10 CDOFF 9 FR1 8 FR0 7 VD0 6 CKOUT 1 1 CKIN (Not Mount) GND VDD C3 CAP_PIN VDD C7 CAP 10uF 3 SMA H11 HOLE10 SW 1 SW5 C R2 RES_PIN 2 HOLE03 H10 GND U2 H30 CKOUT NEW_T MSOP10_8126 1 SW1 1 HOLE03 H8 1 VDD 1 HOLE03 H7 SW2 1 VDD 2 Gnd3 C2 CAP_CHIP (Not Mount) C SW 3 H29 HOLE10 AK8126 D VDD SW 3 1 C1 CAP_CHIP 1 2 1 2 H38 HOLE10 0.1uF 1 SW3 1 VDD Gnd1 1 RES_PIN SW 3 Gnd3 Gnd4 SMA 1 Gnd4 R8 1 CKIN 2 Gnd2 U3 H26 HOLE10 U1 2 3 4 1 Gnd2 Gnd1 1 4 3 2 (Not Mount) RES_PIN R7 E 5 (Not Mount) 6 MA406_8126 7 B H10 HOLE40 H10 HOLE41 2 SW A A T itle AKD8126_10PIN Size A Document Number <Doc> Date: 7 6 5 4 3 Rev <RevCode> Wednesday, January 30, 2008 2 Sheet 1 of 1 1