19-2821; Rev 1; 2/09 MAX3804 Evaluation Kit The MAX3804 DC-coupled evaluation kit (EV kit) simplifies evaluation of the MAX3804 12.5Gbps settable equalizer. The EV kit enables full testing of the device functions including all equalization settings. SMA connectors with 50Ω controlled-impedance transmission lines to the MAX3804 are provided for all CML input and output ports. Ordering Information PART TYPE MAX3804EVKIT# EV Kit #Denotes RoHS compliant. Component List DESIGNATION QTY DESCRIPTION C1–C5 5 0.1μF ±10% ceramic capacitors (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, JP2, JP3 3 2-pin headers, 0.1in centers JPEQ1, JPEQ2, JPEQ3 3 3-pin headers, 0.1in centers R3 1 10k resistor (0402) R4 1 12k resistor (0402) R5 1 8k resistor (0402) GND, VCC, VCC1, VCC2, VEE, TP4, TP5 7 Test points U1 1 12.5Gbps settable receive equalizer (16 TQFN) Maxim MAX3804ETE#G16 None 5 Shunts None 1 PCB: MAX3804 EV kit board# None 1 MAX3804 data sheet Features ♦ DC-Coupled EV Kit ♦ SMA Connectors for All High-Speed Inputs and Outputs ♦ Fully Assembled and Tested Quick Start Note: The MAX3804 EV kit is a DC-coupled evaluation board. Care must be taken to ensure that no direct short between the supply voltage and supply ground exists. Use external coupling capacitors on the input and output when AC-coupling is desired. DC-coupled operation with positive VCC supplies normally causes permanent damage to laboratory test equipment (typical oscilloscope, BERT). The MAX3804 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 TP3 (VEE). Connect the power-supply ground to TP2 (GND) and J6 (VCC). Install shunts in JP2 and JP3, and remove shunt from JP1. 2) Install shunts across pins 2 and 3 of JPEQ1, JPEQ2, and JPEQ3 for minimal equalization (0, 0, 0). See Table 1 for the relationship between nominal path loss and FR-4 microstrip path length. 3) Apply a differential input signal (400mV P-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 J3 and J4 (SDO+ and SDO-) to observe the output of the equalizer. Component Suppliers Table 1. Relationship Between Nominal Path Loss and FR-4 Microstrip Path Length JPEQ3 JPEQ2 JPEQ1 NOMINAL 6-mil FR-4 MICROSTRIP LENGTH (in) 0 0 0 2 0 0 1 6 0 1 0 10 PHONE WEBSITE 0 1 1 14 AVX 803-946-0238 www.avxcorp.com 1 0 0 18 Coilcraft, Inc. 847-639-6400 www.coilcraft.com 1 0 1 22 1 1 0 26 1 1 1 30 SUPPLIER Murata Electronics North America, Inc. 770-436-1300 www.muratanorthamerica.com Zetex Semiconductors 631-543-7100 www.zetex.com Note: 0 refers to pins 2 and 3 shunted. 1 refers to pins 1 and 2 shunted. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluates: MAX3804 General Description Adjustment and Control Descriptions (see Quick Start) COMPONENT NAME FUNCTION JPEQ1 EQ1 Equalizer boost control logic input LSB JPEQ2 EQ2 Equalizer boost control logic input JPEQ3 EQ3 Equalizer boost control logic input MSB DC-Coupled Operation with Laboratory Equipment Connect a +1.85V power supply to J6 (VCC). Connect a -1.65V power supply to TP3 (VEE). Connect the power-supply ground to TP2 (GND). Install shunts JP2 and JP3. Remove shunt JP1. With this setup the part can be DC-coupled to external laboratory equipment (typical oscilloscope, BERT). DC-Coupled Operation with Oscilloscopes and BERTs Alternative Supply Configurations AC-Coupled Operation with VCC1 = VCC2 = +1.65V Connect a +3.3V power supply to J6 (VCC). Connect a +1.65V power supply to TP1 (VCC1) and J5 (VCC2). Connect the power-supply ground to TP2 (GND). Remove shunts JP2 and JP3. Install shunt JP1. Use external AC-coupling for connecting to external laboratory equipment (typical oscilloscope, BERT). The MAX3804 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 MAX3804 VCCs are connected to a 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 MAX3804 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. C5 0.1μF VCC VEE JP3 TP4 VCC J6 VCC J2 SDI- VEE C8 33μF C6 0.1μF JP1 4 VEE C2 0.1μF N.C. VCC GND 3 VCCI C10 33μF C9 33μF 2 VCC2 C3 0.1μF VCC2 12 VCC1 U1 SDI+ SDO+ MAX3804* SDI- SDO- VEE J4 SDO+ 11 J3 SDO- 10 VCC2 VCC2 9 VCC1 VCC 5 6 GND C7 33μF TP3 VEE 1 VEE J1 SDI+ 13 EQ3 J5 VCC2 EQ2 VCC2 EG1 TP5 14 N.C. 15 16 C1 VCCI 0.1μF 7 VEE C4 0.1μF 8 R3 10kΩ TP2 GND VEE JP2 R4 12kΩ R5 8kΩ TP8 VEE JPEQ3 VCC1 JPEQ2 TP1 VCC1 JPEQ1 Evaluates: MAX3804 MAX3804 Evaluation Kit TP9 TP10 *EXPOSED PAD IS CONNECTED TO VEE. Figure 1. MAX3804 Schematic Diagram 2 _______________________________________________________________________________________ MAX3804 Evaluation Kit Evaluates: MAX3804 Figure 2. MAX3804 Component Placement Guide Figure 3. MAX3804 PCB Layout—Component Side _______________________________________________________________________________________ 3 Evaluates: MAX3804 MAX3804 Evaluation Kit Figure 4. MAX3804 PCB Layout—Ground Plane 4 Figure 5. MAX3804 PCB Layout—Power Plane _______________________________________________________________________________________ MAX3804 Evaluation Kit Evaluates: MAX3804 Figure 6. MAX3804 PCB Layout—Solder Side _______________________________________________________________________________________ 5 Evaluates: MAX3804 MAX3804 Evaluation Kit Revision History REVISION NUMBER REVISION DATE 0 4/03 1 2/09 DESCRIPTION PAGES CHANGED Initial release. — Changed the Ordering Information to include RoHS compliance. 1 Updated the MAX3804 part number for U1 in the Component List. 1 Replaced figures 2 to 6. 3, 4, 5 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. 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.