19-2965; Rev 0; 8/03 MAX3805 Evaluation Kit The MAX3805 DC-coupled evaluation kit (EV kit) simplifies evaluation of the MAX3805 10.7Gbps adaptive equalizer. The EV kit enables full testing of device functions. SMA connectors with 50Ω controlledimpedance transmission lines to the MAX3805 are provided for all CML input and output ports. _______________ Ordering Information PART TEMP. RANGE MAX3805EVKIT -40°C to +85°C IC PACKAGE 16 QFN _________________________Features ♦ DC-Coupled Evaluation Kit ♦ SMA Connectors for All High-Speed Inputs and Outputs ♦ Fully Assembled and Tested ________________________ Quick Start Note: ____________________ Component List DESIGNATION QTY DESCRIPTION C1-C5 5 0.1µF +10% ceramic capacitor (0402) C6 1 0.1µF +10% ceramic capacitor (0603) C7-C10 4 33µF +10% tantalum capacitors (case-B) J1-J4 4 SMA connectors, tab contact JP1-JP5 5 GND, VCC, VCC1, VCC2, VEE, TP4, TP5, TP9, TP10 R7 U1 None None None The MAX3805 EV kit is a DC-coupled evaluation board. Use external coupling capacitors on the input and output when AC-coupling is desired. DC-coupled operation with positive VCC supplies can cause permanent damage to laboratory test equipment (oscilloscope, BERT). The MAX3805 EV kit must be operated from a negative VEE supply when DC-coupled to normal laboratory equipment. 1) Connect a –3.3V power supply to VEE. Connect the power supply ground to GND and VCC. Remove shunt on JP1; install shunts on JP2 and JP3. 2-pin headers, 0.1in centers 2) Connect TP9 to TP10. 9 Test points Digi-Key 5000K-ND 3) 1 1 3 1 1 500kΩ Variable resistor MAX3805 ETE Shunts MAX3805 EV board MAX3805 data sheet Apply a differential 9.953Gbps input signal (400mVP-P to 1200mVP-P) between SMA connectors J1 and J2, (SDI+ and SDI-) 4) Attach a differential high-speed oscilloscope with a 50Ω input to SMA connectors J4 and J3 (SDO+ and SDO-) to observe the output of the equalizer. ______________ Component Suppliers SUPPLIER PHONE FAX Digi-Key 218-681-6674 218-681-3380 Murata 814-237-1431 814-238-0490 Coilcraft 847-639-6400 847-639-1469 AVX 803-946-0690 803-626-3123 Note: Please indicate that you are using the MAX3805 when ordering from these suppliers. _________________________________________________________________Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluates: MAX3805 _______________ General Description MAX3805 Evaluation Kit Evaluates: MAX3805 _Alternative Supply Configurations AC-Coupled Operation with VCC1 = VCC2 = +1.8V Connect a +3.3V power supply to VCC. Connect a +1.8V power supply to VCC1 and VCC2. Connect the powersupply ground to GND. Remove shunts JP2 and JP3. Install shunt JP1. Use external AC-coupling capacitors for connecting to external laboratory equipment (oscilloscope, BERT). DC-Coupled Operation with Laboratory Equipment Connect a +1.5V power supply to VCC. Connect a -1.8V power supply to VEE. Connect the power-supply ground to GND. Install shunts on JP2 and JP3. Remove shunt on JP1. With this setup the part can be DCcoupled to external laboratory equipment (oscilloscope, BERT) DC-Coupled Operation _____with Oscilloscope and BERTs The MAX3805 is designed with DC-coupled inputs and outputs, implemented with internal 50Ω terminations to VCC1 (SDI+) and VCC2 (SDO+). Laboratory oscilloscopes and BERTs normally terminate their inputs and outputs with 50Ω to ground. When the MAX3805 VCCs are connected to positive supply, a DC path exists from the power supply to the ports of the oscilloscope or BERT. This configuration can cause permanent damage to the oscilloscope or BERT. When the MAX3805 EV kit is being used with normal oscilloscopes or BERTs, either external AC-coupling must be provided or VCC1 and VCC2 must be connected to ground (i.e., using a negative VEE supply). Failure to do so may permanently damage laboratory equipment. Figure 1. MAX3805 EV kit Schematic 2________________________________________________________________________________ . MAX3805 Evaluation Kit Evaluates: MAX3805 Figure 2. MAX3805 Component Placement Guide Figure 3. MAX3805 PC Board Layout – Component Side _________________________________________________________________________________________ 3 Evaluates: MAX3805 MAX3805 Evaluation Kit Figure 4. MAX3805 PC Board Layout – Ground Plane Figure 5. MAX3805 PC Board Layout – Power Plane 4________________________________________________________________________________ . MAX3805 Evaluation Kit Evaluates: MAX3805 Figure 6. MAX3805 PC Board Layout – Solder Side Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ________________ 5 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. This datasheet has been download from: www.datasheetcatalog.com Datasheets for electronics components.