19-2169; Rev 0; 9/01 MAX3980/MAX3981 Evaluation Kits Features ♦ SMA Connectors for All High-Speed Inputs and Outputs ♦ Fully Assembled and Tested ♦ Single +3.3V Operation Ordering Information Component Suppliers SUPPLIER PHONE FAX AVX 843-444-2863 843-626-3123 MAX3980EVKIT 0°C to +85°C 44 QFN-EP* Murata 415-964-6321 415-964-8165 MAX3981EVKIT 0°C to +85°C 44 QFN-EP* Toko 800-PIK-TOKO 847-699-7864 PART TEMP RANGE IC PACKAGE *Exposed pad Note: Please indicate that you are using the MAX3980/MAX3981 when contacting these component suppliers. Component List DESIGNATION QTY C1 1 33µF tantalum capacitor AVX TAJC336K010 23 0.1µF ±10% ceramic capacitors (0603) Murata GRM39X5R104K010 C2, C5–C24, C27, C28 L1 1 DESCRIPTION 4.7µH inductor Toko LL1608FH-4N7K J1–J16 16 SMA connectors (edge-mount, tab) EFJohnson 142-0701-851 JP1, JP2 2 2-pin headers (0.1in centers) Digi-Key S1012-36-ND R5 1 10kΩ ±1% resistor (0603) U1 1 DESIGNATION QTY DESCRIPTION VCC, GND 2 Test points Digi-Key 5000-ND None 2 Shunts Digi-Key S9000-ND None 1 MAX3980/MAX3981 EV kit circuit board, rev D None 1 MAX3980/MAX3981 EV kit data sheet None 1 MAX3980 data sheet (MAX3980 EV kit) None 1 MAX3981 data sheet (MAX3981 EV kit) MAX3980UGH (MAX3980 EV kit) MAX3981UGH (MAX3981 EV kit) ________________________________________________________________ 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 Evaluate: MAX3980/MAX3981 General Description The MAX3980/MAX3981 evaluation kits (EV kits) simplify evaluation of the MAX3980/MAX3981 quad equalizer. The EV kits enable testing of all the device functions. SMA connectors with 50Ω controlled-impedance connections to the MAX3980/MAX3981 are provided for all input and output ports to facilitate connection to highspeed test equipment. Evaluate: MAX3980/MAX3981 MAX3980/MAX3981 Evaluation Kits Quick Start SDET (SIGNAL DETECT, PIN 44) 1) Connect a +3.3V power supply to JH1 (VCC). Connect the power-supply ground to JH2 (GND). 2) Connect a differential signal between 200mVp-p and 800mVp-p to the inputs IN1+ and IN1- using 50Ω cables. 3) Terminate unused inputs with 50Ω terminations. 4) If not already done, remove shunt from JP2. This ensures the part is enabled and is not in the standby mode. 5) Connect signals OUT1+ and OUT1- to an oscilloscope with 50Ω input terminations. 6) The input signal should be a short pattern, such as 27 - 1 PRBS or K28.5, at 3.125Gbps. 7) The enable (EN) signal is available at JP2. It is pulled high with a 10kΩ resistor on the EV board so no other pullup is necessary. To disable the equalizer, connect shunt (B) as shown in Figure 1. Otherwise, remove the shunt. 8) The SDET pin, as shown in Figure 1, indicates the presence of a signal. When a shunt (A) is connected to JP1, the equalizer will automatically be enabled when a signal is detected. Otherwise, remove the shunt. 2 VCC (A) JP1 (B) JP2 10kΩ EN (ENABLE, PIN 43) (A) SHUNT TO AUTOMATICALLY HAVE SIGNAL DETECT (SDET) ENABLE EQUALIZER (B) SHUNT TO DISABLE EQUALIZER Figure 1. Control Functions 9) MAX3980 Evaluation: After the board has been checked out initially, evaluation can begin with an FR4 PC board. It is advisable to start with a board length of 20in and then progress to longer lengths. The user needs to adapt SMA connectors to the PC board. 10) MAX3981 Evaluation: After the board has been checked out initially, evaluation can begin with a twin-axial or shielded twisted-pair cable. It is advisable to start with a cable length of 5ft and then progress to longer lengths. The user needs to adapt SMA connectors to the cable. _______________________________________________________________________________________ MAX3980/MAX3981 Evaluation Kits Evaluate: MAX3980/MAX3981 VCC L1 4.7µH JH1 VCC C2 0.1µF C1 33µF C5 0.1µF C6 0.1µF C7 0.1µF C8 0.1µF C27 0.1µF C28 0.1µF JH2 GND VCC R5 10kΩ SDET JP1 VCC EN JP2 J2 OUT1C10 0.1µF C18 0.1µF J12 IN3+ 8 9 10 C20 0.1µF J14 IN3- 11 C22 0.1µF 35 GND 34 36 37 38 39 40 41 42 43 MAX3980 MAX3981 IN3+ IN3- 22 N.C. 7 21 N.C. J10 IN2- 20 N.C. 6 C16 0.1µF OUT2+ 33 OUT2- 32 VCC 31 GND OUT3+ OUT3VCC GND OUT4+ OUT4VCC 19 N.C. 5 18 N.C. J8 IN2+ 4 17 N.C. C14 0.1µF U1 16 GND 3 15 IN4- J6 IN1- 14 IN4+ C12 0.1µF VCC IN1+ IN1GND VCC IN2+ IN2GND VCC 13 VCC 2 12 GND 1 J4 IN1+ SDET EN N.C. N.C. N.C. N.C. GND OUT1+ OUT1VCC 44 VCC J1 OUT1+ C9 0.1µF 30 J5 OUT2C13 0.1µF J3 OUT2+ C11 0.1µF J7 OUT3+ 29 J9 OUT3- 28 27 26 C17 0.1µF C15 0.1µF J11 OUT4+ 25 J13 OUT4- 24 23 C21 0.1µF C19 0.1µF J15 IN4+ C23 0.1µF J16 IN4C24 0.1µF Figure 2. MAX3980/MAX3981 EV Kit Schematic Diagram _______________________________________________________________________________________ 3 Evaluate: MAX3980/MAX3981 MAX3980/MAX3981 Evaluation Kits 1.0" Figure 3. MAX3980/MAX3981 EV Kit Component Placement Guide—Component Side 4 _______________________________________________________________________________________ MAX3980/MAX3981 Evaluation Kits Evaluate: MAX3980/MAX3981 1.0" Figure 4. MAX3980/MAX3981 EV Kit PC Board Layout—Component Side _______________________________________________________________________________________ 5 Evaluate: MAX3980/MAX3981 MAX3980/MAX3981 Evaluation Kits 1.0" Figure 5. MAX3980/MAX3981 EV Kit PC Board Layout—Ground Plane 6 _______________________________________________________________________________________ MAX3980/MAX3981 Evaluation Kits Evaluate: MAX3980/MAX3981 1.0" Figure 6. MAX3980/MAX3981 EV Kit PC Board Layout—Power Plane _______________________________________________________________________________________ 7 Evaluate: MAX3980/MAX3981 MAX3980/MAX3981 Evaluation Kits 1.0" Figure 7. MAX3980/MAX3981 EV Kit 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. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.