19-2258; Rev 0; 12/01 MAX3772–MAX3775 Evaluation Kits Features ♦ SMA Connectors for All High-Speed Inputs and Outputs ♦ On-Board 75Ω to 50Ω Impedance-Conversion Networks ♦ Jumpers for Controlling the Clock Output and Rate Select Function ♦ Frequency Lock Indicator ♦ Test Strip for Board Characterization ♦ Fully Assembled and Tested Ordering Information Component Suppliers SUPPLIER PHONE PART TEMP RANGE MAX3772EVKI 0°C to +70°C IC PACKAGE 16 QSOP-EP* MAX3773EVKI 0°C to +70°C 16 QSOP-EP* MAX3774EVKI 0°C to +70°C 16 QSOP-EP* MAX3775EVKI 0°C to +70°C 16 QSOP-EP* FAX AVX 843-946-0238 843-626-3123 Coilcraft 847-639-6400 847-639-1469 Murata 770-436-1300 770-436-3030 Venkel 800-950-8365 512-794-0087 Note: Please indicate that you are using the MAX3772–MAX3775 when contacting these component suppliers. Selector Guide MAX3772EVKIT DIFFERENTIAL INPUT TERMINATION 100Ω DIFFERENTIAL OUTPUT TERMINATION 100Ω MAX3773EVKIT 150Ω 100Ω MAX3774EVKIT 100Ω 150Ω MAX3775EVKIT 150Ω 150Ω PART MAX3772 Component List DESIGNATION C1–C6, C8, C9, C12–C15 QTY 12 DESCRIPTION 0.1µF ±10% ceramic capacitors (0805) Murata GRM21BR71E104KA01C C7 1 0.047µF ±10% ceramic capacitor (0603) Murata GRM188R71E473KA01B C10 1 2.2µF ±10% ceramic capacitor (1206) Murata GRM31MR71C225KC11B DESIGNATION QTY DESCRIPTION C11 1 33µF tantalum capacitor AVX TAJC336K016R J1–J6, J10–J13 10 SMA connectors (edge mount) J8, J9 2 3-pin headers (0.1in centers) L1 1 56nH inductor Coilcraft 0805HT-56NTKBC R1, R2, R4, R5, R7, R8, R11, R12, R14, R15 10 0Ω resistors (0402) ________________________________________________________________ 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: MAX3772–MAX3775 General Description The MAX3772–MAX3775 evaluation kits (EV kits) simplify evaluation of the MAX3772–MAX3775 Fibre Channel repeater ICs. These fully assembled and factory-tested EV kits enable testing of all the devices’ functions. 50Ω SMA connectors and controlled-impedance transmission lines are provided for the differential data inputs and outputs, as well as the voltage-controlled oscillator (VCO) clock outputs. A test/calibration path enables the user to calibrate test equipment so accurate measurements can be taken. On-board 75Ω to 50Ω impedancetransformation networks simplify interfacing with standard 50Ω test equipment. Jumpers allow the user to enable or disable the repeater IC frequency lock indicator and the VCO’s clock outputs. The VCO frequency lock can be monitored at the LOCK test point. MAX3772–MAX3775 Evaluation Kits Evaluate: MAX3772–MAX3775 MAX3772 Component List (continued) DESIGNATION QTY DESCRIPTION R3, R6, R9, R13, R16 5 Open VCC, GND, J7 3 Test points U1 1 MAX3772CEE 16-pin QSOP-EP None 2 Shunts for J8 and J9 None 1 MAX3772–MAX3775 data sheet None 1 MAX3772–MAX3775 EV kit circuit board, rev B MAX3773 Component List DESIGNATION DESCRIPTION 12 0.1µF ±10% ceramic capacitors (0805) Murata GRM21BR71E104KA01C 1 0.047µF ±10% ceramic capacitor (0603) Murata GRM188R71E473KA01B C10 1 2.2µF ±10% ceramic capacitor (1206) Murata GRM31MR71C225KC11B C11 1 33µF tantalum capacitor AVX TAJC336K016R C1–C6, C8, C9, C12–C15 C7 DESIGNATION QTY DESCRIPTION C1–C6, C8, C9, C12–C15 12 0.1µF ±10% ceramic capacitors (0805) Murata GRM21BR71E104KA01C C7 1 0.047µF ±10% ceramic capacitor (0603) Murata GRM188R71E473KA01B C10 1 2.2µF ±10% ceramic capacitor (1206) Murata GRM31MR71C225KC11B C11 1 33µF tantalum capacitor AVX TAJC336K016R J1–J6, J10–J13 10 SMA connectors (edge mount) J8, J9 2 3-pin headers (0.1in centers) L1 1 56nH inductor Coilcraft 0805HT-56NTKBC R1, R2, R11, R12, R14, R15 6 0Ω resistors (0402) R3, R13, R16 3 Open R4, R5, R7, R8 4 43.2Ω ±1% resistors (0402) R6, R9 2 178Ω ±1% resistors (0402) VCC, GND, J7 3 Test points U1 1 MAX3774CEE 16-pin QSOP-EP None 2 Shunts for J8 and J9 None 1 MAX3772–MAX3775 data sheet None 1 MAX3772–MAX3775 EV kit circuit board, rev B J1–J6, J10–J13 10 SMA connectors (edge mount) J8, J9 2 3-pin headers (0.1in centers) L1 1 56nH inductor Coilcraft 0805HT-56NTKBC R1, R2 2 43.2Ω ±1% resistors (0402) R3 1 178Ω ±1% resistor (0402) DESIGNATION QTY R4, R5, R7, R8, R11, R12, R14, R15 8 0Ω resistors (0402) C1–C6, C8, C9, C12–C15 12 0.1µF ±10% ceramic capacitors (0805) Murata GRM21BR71E104KA01C R6, R9, R13, R16 4 Open C7 1 0.047µF ±10% ceramic capacitor (0603) Murata GRM188R71E473KA01B C10 1 2.2µF ±10% ceramic capacitor (1206) Murata GRM31MR71C225KC11B VCC, GND, J7 3 Test points U1 1 MAX3773CEE 16-pin QSOP-EP None 2 Shunts for J8 and J9 None 1 MAX3772–MAX3775 data sheet 1 MAX3772–MAX3775 EV kit circuit board, rev B None 2 QTY MAX3774 Component List MAX3775 Component List DESCRIPTION _______________________________________________________________________________________ MAX3772–MAX3775 Evaluation Kits DESIGNATION QTY DESCRIPTION C11 1 33µF tantalum capacitor AVX TAJC336K016R J1–J6, J10–J13 10 SMA connectors (edge mount) J8, J9 2 3-pin headers (0.1in centers) L1 1 56nH inductor Coilcraft 0805HT-56NTKBC R1, R2, R4, R5, R7, R8, R11, R12, R14, R15 10 43.2Ω ±1% resistors (0402) R3, R6, R9, R13, R16 5 178Ω ±1% resistors (0402) VCC, GND, J7 3 Test points U1 1 MAX3775CEE 16-pin QSOP-EP None 2 Shunts for J8 and J9 None 1 MAX3772–MAX3775 data sheet None 1 MAX3772–MAX3775 EV kit circuit board, rev B Quick Start 1) Select the data rate with J8 (see Table 1). Shorting pins 2 and 3 connects RATESEL to VCC for 2.125Gbps operation. Shorting pins 1 and 2 connects RATESEL to GND for 1.0625Gbps operation. 2) Connect a differential signal source to the SMA connectors at IN+ and IN-. Set the differential signal amplitude to 500mVP-P. Set the input signal’s data rate to 2.125Gbps or 1.0625Gbps, depending on the selected data rate. 3) Connect a shunt across pins 2 and 3 of J9 to connect CLKEN to VCC to enable the clock output. Shunt pins 1 and 2 to connect CLKEN to GND if no clock output is desired (see Table 1). 4) Connect the data and the clock outputs (OUT+, OUT-, CLK+, and CLK-) through a 50Ω matchedimpedance cable to a 50Ω oscilloscope with a bandwidth of at least 3GHz. 5) Power up the EV kit with a 3.3V supply. The scope shows an output waveform for the MAX3772/ MAX3773 of approximately 1400mVP-P, while the MAX3774/MAX3775 shows approximately 600mVPP. Some high-speed sampling oscilloscopes are not capable of displaying input voltages of this magnitude. Use appropriate attenuators to ensure the waveforms are not visually distorted. Detailed Description The MAX3772–MAX3775 EV kits simplify the evaluation of the MAX3772–MAX3775 Fibre Channel compliant repeaters. The EV kits operate from a single 3.3V power supply and come complete with all the external components necessary to interface with 50Ω test equipment. Connections SMA connectors are provided for all high-speed inputs and outputs. All 75Ω inputs and outputs are AC-coupled through a 75Ω to 50Ω impedance-conversion network, while devices with 50Ω terminations are connected only through AC-coupling capacitors and 0Ω series resistors to the input SMAs. SMA connectors are also provided for the calibration test strip. Power-supply connections (VCC and ground) are provided through a 2-pin header. A test point is provided to monitor the frequency LOCK output. The control inputs (RATESEL and CLKEN, see Table 1) are connected to individual 3-pin headers that allow the selection of VCC or GND with a shunt. Control Functions The MAX3772–MAX3775 EV kits are equipped with two 3-pin headers that allow the user to enable/disable the clock output, and select the data rate. Pin 1 is connected to ground for both headers, pin 2 is connected to the device’s control inputs, and pin 3 is connected to VCC. See Table 1 for RATESEL and CLKEN selections. Table 1. Controls and LOCK Indicator HEADER NAME J8 RATESEL J9 CLKEN FUNCTION SHUNT POSITIONS 1 AND 2 1.0625Gbps operation Disable clock output at CLK± (normal operating mode) SHUNT POSITIONS 2 AND 3 2.125Gbps operation Enable clock output at CLK± (test mode) _______________________________________________________________________________________ 3 Evaluate: MAX3772–MAX3775 MAX3775 Component List (continued) Evaluate: MAX3772–MAX3775 MAX3772–MAX3775 Evaluation Kits Input and Output Impedance Conversion The impedance-transformation networks introduce signal attenuation when converting from a 75Ω to a 50Ω environment. The input signal is attenuated by a factor of 0.64, and the output signal is attenuated by a factor of 0.43. For example, a 600mV differential signal applied to the input terminals of the MAX3775 EV kit will produce a 381mV differential input signal across the device’s input pins. If a 600mV differential signal is observed at the output terminals of the MAX3775 EV kit, the device’s actual output is a 1400mV differential signal. This Maxim family of dual-rate CDRs is designed to operate in 50Ω, 75Ω, and mixed impedance environments. Impedance-conversion networks are included on the MAX3773/MAX3774/MAX3775 EV kits for interfacing to standard 50Ω test equipment. An EV kit for a device with a 50Ω input and/or 50Ω outputs has the pads for an impedance-conversion network, but the pads are populated only with 0Ω series resistors to keep the impedance seen by test equipment to 50Ω (see Figures 1–4 for the MAX3772–MAX3775 schematics). Test/Calibration Circuit The test/calibration signal path contains the same type of SMA connectors, transmission line layout, and J7 LOCK R4 0Ω C3 0.1µF R6 R5 OPEN 0Ω C4 0.1µF R7 0Ω C5 0.1µF R9 R8 OPEN 0Ω C6 0.1µF C7 0.047µF 1 2 C1 0.1µF R1 0Ω J1 IN2 3 4 C2 0.1µF R3 OPEN 5 6 J2 IN- R2 0Ω 7 8 LOCK CF+ CF- U1 CLK+ GND MAX3772 CLK- IN+ CLKEN IN- GND OUT+ GND VCC OUT- VCC RATESEL RATESEL 15 14 12 11 10 9 J8 CLKEN L1 56nH J14 C11 33µF C10 2.2µF C8 0.1µF C9 0.1µF GND C12 0.1µF J10 TEST2+ R13 C13 OPEN 0.1µF J11 TEST2- R11 0Ω R14 0Ω R12 0Ω R15 0Ω C14 0.1µF J12 TEST1+ R16 OPEN C15 0.1µF J13 TEST1- Figure 1. MAX3772 EV Kit Schematic 4 J4 CLK- 13 J9 VCC J3 CLK+ 16 _______________________________________________________________________________________ J5 OUT+ J6 OUT- MAX3772–MAX3775 Evaluation Kits The performance of these dual-rate repeaters can be greatly affected by circuit board layout and design. Use good high-frequency design technique; including minimizing ground inductances and using fixed-impedance transmission lines on the data and clock signals. Lock Monitor The MAX3772–MAX3775 EV kits are provided with a frequency lock test point. A logic-level low indicates that the phase-lock loop has lost lock to the incoming data frequency. A logic-level high indicates that the device is locked to the incoming data, or the input signal amplitude is below the phase-detector threshold and the VCO is free-running. J7 LOCK R4 0Ω C3 0.1µF R6 R5 OPEN 0Ω C4 0.1µF R7 0Ω C5 0.1µF R9 R8 OPEN 0Ω C6 0.1µF C7 0.047µF 1 C1 0.1µF J1 IN2 2 R1 43.2Ω 3 4 C2 0.1µF R3 178Ω 5 6 J2 IN- R2 43.2Ω 7 8 LOCK CF+ CF- U1 CLK+ GND MAX3773 CLK- IN+ CLKEN IN- GND GND OUT+ VCC OUTRATESEL VCC RATESEL J3 CLK+ 16 15 14 J4 CLK- 13 12 11 10 9 J5 OUT+ J6 OUT- J8 J9 CLKEN L1 56nH C8 0.1µF VCC J14 C11 33µF C10 2.2µF C9 0.1µF GND C12 0.1µF J10 TEST2+ R13 C13 OPEN 0.1µF J11 TEST2- R11 0Ω R14 0Ω R12 0Ω R15 0Ω C14 0.1µF J12 TEST1+ R16 OPEN C15 0.1µF J13 TEST1- Figure 2. MAX3773 EV Kit Schematic _______________________________________________________________________________________ 5 Evaluate: MAX3772–MAX3775 Layout Considerations impedance-transformation networks as provided for the data repeater IC’s signal I/Os. The test/calibration circuit can be used for PC board characterization and jitter calibration. Evaluate: MAX3772–MAX3775 MAX3772–MAX3775 Evaluation Kits J7 LOCK C7 0.047µF 1 2 C1 0.1µF R1 0Ω J1 IN2 3 4 C2 0.1µF R3 OPEN 5 6 J2 IN- R2 0Ω 7 8 LOCK CF+ CF- U1 CLK+ GND MAX3774 CLK- IN+ CLKEN IN- GND OUT+ GND VCC OUT- VCC RATESEL RATESEL R4 43.2Ω C3 0.1µF R6 R5 178Ω 43.2Ω C4 0.1µF R7 43.2Ω C5 0.1µF J3 CLK+ 16 15 14 13 12 11 10 J5 OUT+ R9 R8 178Ω 43.2Ω 9 J8 J9 CLKEN L1 56nH C8 0.1µF VCC J14 C11 33µF C10 2.2µF C9 0.1µF GND C12 0.1µF J10 TEST2+ R13 C13 OPEN 0.1µF J11 TEST2- R11 0Ω R14 0Ω R12 0Ω R15 0Ω C14 0.1µF J12 TEST1+ R16 OPEN C15 0.1µF J13 TEST1- Figure 3. MAX3774 EV Kit Schematic 6 J4 CLK- _______________________________________________________________________________________ C6 0.1µF J6 OUT- MAX3772–MAX3775 Evaluation Kits Evaluate: MAX3772–MAX3775 J7 LOCK C7 0.047µF 1 C1 0.1µF J1 IN2 2 R1 43.2Ω 3 4 C2 0.1µF R3 178Ω 5 6 J2 IN- R2 43.2Ω 7 8 LOCK CF+ CF- U1 CLK+ GND MAX3775 CLK- IN+ CLKEN IN- GND GND OUT+ VCC OUTRATESEL VCC RATESEL R4 43.2Ω C3 0.1µF R6 R5 178Ω 43.2Ω C4 0.1µF R7 43.2Ω C5 0.1µF J3 CLK+ 16 15 14 J4 CLK- 13 12 11 10 J5 OUT+ R9 R8 178Ω 43.2Ω 9 C6 0.1µF J6 OUT- J8 J9 CLKEN L1 56nH C8 0.1µF VCC J14 C11 33µF C10 2.2µF C9 0.1µF GND C12 0.1µF J10 TEST2+ R13 C13 178Ω 0.1µF J11 TEST2- R11 43.2Ω R14 43.2Ω R12 43.2Ω R15 43.2Ω C14 0.1µF J12 TEST1+ R16 178Ω C15 0.1µF J13 TEST1- Figure 4. MAX3775 EV Kit Schematic _______________________________________________________________________________________ 7 Evaluate: MAX3772–MAX3775 MAX3772–MAX3775 Evaluation Kits Figure 5. MAX3772–MAX3775 EV Kit Component Placement Guide—Component Side 8 _______________________________________________________________________________________ MAX3772–MAX3775 Evaluation Kits Evaluate: MAX3772–MAX3775 Figure 6. MAX3772–MAX3775 EV Kit PC Board Layout—Component Side _______________________________________________________________________________________ 9 Evaluate: MAX3772–MAX3775 MAX3772–MAX3775 Evaluation Kits Figure 7. MAX3772–MAX3775 EV Kit PC Board Layout—Solder Side 10 ______________________________________________________________________________________ MAX3772–MAX3775 Evaluation Kits Evaluate: MAX3772–MAX3775 Figure 8. MAX3772–MAX3775 EV Kit PC Board Layout—Ground Plane ______________________________________________________________________________________ 11 Evaluates: MAX3772–MAX3775 MAX3772–MAX3775 Evaluation Kits Figure 9. MAX3772–MAX3775 EV Kit PC Board Layout—Power Plane 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. 12 ____________________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.