19-1642; Rev 0; 1/00 MAX3876 Evaluation Kit Features ♦ SMA Connections for All System I/Os ♦ Test Point for Monitoring Loss-of-Lock (LOL) ♦ Single +3.3V Power-Supply Operation ♦ Fully Assembled and Tested The MAX3876 EV kit comes configured for +3.3V operation and consumes approximately 140mA. Component Suppliers SUPPLIER Coilcraft PHONE FAX 847-639-6400 847-639-1469 Ordering Information PART MAX3876EVKIT TEMP. RANGE -40°C to +85°C IC PACKAGE 5mm 32 TQFP Note: Please indicate that you are using the MAX3876 when contacting this component supplier. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION C1–C6, C14–C18, C21–C26, C29, C30 19 0.1µF, 10V min ceramic capacitors R25, R28 2 0Ω ±5% resistors Test points 5 Open LOL, GND, +3.3V 3 C7–C11 1 3-pin header (0.1in centers) 1 1µF, 10V min X7R ceramic capacitor JP10 C12 None 2 Shunts C19 1 33µF ±20%, 10V min tantalum capacitor Edge-mount SMA connectors 1 2.2µF, 10V min ceramic capacitor 8 C20 SDI+, SDI-, SLBI+, SLBI-, SCLKO+, SCLKO-, SDO+, SDO- D1 1 Red LED U1 1 L1, L2, L3 3 56nH inductors Coilcraft 0805HS-560TKBC MAX3876EHJ (5mm 32-pin TQFP) None 1 MAX3876 evaluation kit R1 1 392Ω ±1% resistor R10, R13, R17, R21 4 Open None 1 MAX3876 data sheet ________________________________________________________________ Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. Evaluates: MAX3876 General Description The MAX3876 evaluation kit (EV kit) simplifies evaluation of the MAX3876 2.5Gbps clock-recovery and dataretiming IC. The EV kit enables testing of all MAX3876 functions. SMA connectors are provided for the differential CML data and clock outputs, as well as for system loopback functions. Evaluates: MAX3876 MAX3876 Evaluation Kit Detailed Description The MAX3876 EV kit is fully assembled and factory tested. It enables testing of all MAX3876 functions. Test Equipment Required • • • • +3.3V power supply with 300mA current capability Signal-source, 2.5Gbps minimum capability Jitter analyzer capable of 2.5Gbps performance Oscilloscope with at least 3GHz performance Connections The MAX3876 EV kit provides on-board capacitors for all data and clock I/O ports. The serial data and system loopback inputs (SDI+, SDI-, SLBI+, and SLBI-) can be connected directly to a 50Ω source. Additional pads for 50Ω pull-up resistors and 0.1µF power-supply decoupling capacitors are provided on the serial data and clock outputs (SDO+, SDO-, SCLKO+, and SCLKO-). The EV kit is shipped without 50Ω pull-up resistors and can be connected directly to standard test equipment. For evaluation with high-impedance probes, install the 50Ω pull-up resistors and 0.1µF decoupling capacitors. Layout Considerations The MAX3876’s performance can be greatly affected by circuit board layout and design. Use good high-frequency design techniques, including minimizing ground inductances and using fixed-impedance transmission lines on the data and clock signals. Table 1. Jumpers and Test Points TYPE DESCRIPTION NORMAL POSITION JP10 3-Pin Used to select between the serial data input (labeled SDI EN) and the system loopback function (labeled SLBI EN) of the MAX3876 — LOL Test Point Used to monitor LOL voltage level — NAME Setup 1) Select either the serial data inputs, pins 2 and 3 of JP10 (SDI EN), or the system loopback inputs, pins 1 and 2 of JP10 (SLBI EN), with jumper JP10 (Table 1). 2) Connect the +3.3V power supply to the appropriate terminals marked on the EV kit, and apply power. 3) Connect a 2.5Gbps PRBS NRZ signal to the selected inputs with 50Ω cables. 4) Connect the outputs to a 50Ω high-speed oscilloscope. Jitter analysis and product performance can also be observed by appropriately interfacing the EV kit with a bit-error-rate tester (BERT) and a jitter analyzer. Jumpers, and Test Points PLL frequency lock conditions can be monitored at the high-impedance LOL test point. A TTL high (LED off) indicates PLL frequency lock, while a TTL low (LED on) indicates a loss-of-lock condition. Note that the LOL circuitry will not detect a loss-of-power condition (refer to the MAX3876 data sheet). 2 _______________________________________________________________________________________ MAX3876 Evaluation Kit Evaluates: MAX3876 L1 VCCPLL 56nH C21 0.1µF C22 0.1µF C23 0.1µF C24 0.1µF C25 0.1µF C26 0.1µF C29 0.1µF C30 0.1µF C15 0.1µF L2 +3.3V J10 1 C19 33µF 2 VCCVCO 56nH C20 2.2µF L3 GND VCCOUT 56nH C3 0.1µF C14 0.1µF VCCPLL +3.3V R25 0Ω D1 C11 OPEN JP1 R1 392Ω R28 0Ω C12 1µF 7 VCCPLL 8 SDI- VCC MAX3876 VCC SCLKO+ SCLKO- SIS VCC GND 3 JP10 SDI EN 9 10 11 12 13 14 15 C7 OPEN 24 C16 0.1µF VCCOUT SDO- 23 R13 OPEN 22 21 20 +3.3V VCCOUT C17 0.1µF VCCOUT 19 R17 OPEN +3.3V 18 17 C8 OPEN VCCOUT C9 OPEN C18 0.1µF R21 OPEN +3.3V SCLKO+ SCLKO- C10 OPEN VCCVCO C5 0.1µF VCCPLL VCCPLL SLBI+ SLBI- 16 GND JP3 SDO+ LOL GND VCC GND FIL- VCC VCC U1 GND 1 SLBI EN 2 SDI+ +3.3V GND 6 VCCPLL R10 OPEN 25 SDO- VCC SDI- C2 0.1µF 26 VCC VCC 5 27 SDO+ SLBI- 4 28 GND SLBI+ 3 VCCPLL 29 VCC VCC SDI+ 2 C1 0.1µF 30 GND TEST 1 31 FIL+ GND 32 C4 0.1µF LOL C6 0.1µF Figure 1. MAX3876 EV Kit Schematic _______________________________________________________________________________________ 3 Evaluates: MAX3876 MAX3876 Evaluation Kit Figure 2. MAX3876 EV Kit Component Placement Guide Figure 3. MAX3876 EV Kit PC Board Layout—Component Side 4 Figure 4. MAX3876 EV Kit PC Board Layout—Ground Plane _______________________________________________________________________________________ MAX3876 Evaluation Kit Evaluates: MAX3876 Figure 5. MAX3876 EV Kit PC Board Layout—Power Plane Figure 6. MAX3876 EV Kit PC Board Layout—Solder Side _______________________________________________________________________________________ 5 Evaluates: MAX3876 MAX3876 Evaluation Kit NOTES 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 © 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.