Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
19-1046; Rev 0; 10/07 MAX3984 Evaluation Kit The MAX3984 evaluation kit (EV kit) is a fully assembled and tested demonstration board that provides complete evaluation of the MAX3984 1Gbps to 10Gbps preemphasis driver with receive equalizer. Features ♦ Fully Assembled and Tested ♦ Allows Full Electrical Evaluation Ordering Information PART TEMP RANGE MAX3984EVKIT+ 0°C to +85°C IC PACKAGE 16 TQFN-EP +Denotes a lead-free/RoHS-compliant package. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION C1 1 33µF ±10% tantalum capacitor (B case) JU1, JU2 JU4–JU7 C2, C3, C8 3 0.1µF ±10% ceramic capacitors (0402) JU3 1 2-pin header (0.1in centers) None 6 Shunts C4–C7, C9, C10 6 0.01µF ±5% ceramic capacitors (0402) L1 1 4.7µH ±10% inductor (1008) 4 SMA connectors (edge-mount, tab-contact) J1–J4 J6, J10, TP1, TP2, TP3, TP5 6 Test points Quick Start See Figure 1 for quick reference. 1) Remove shunt from JU2. 6 3-pin headers (0.1in centers) R1 1 4.7kΩ ±5% resistor (0402) U1 1 MAX3984UTE+ 16-pin TQFN-EP None 1 PCB: MAX3984 EV kit circuit board, Rev A 6) Install shunt on OUT_LEV (JU7) between GND (logic 0) and the center pin. This sets the output swing to a reduced level. 2) Install shunt on JU3. This disables the squelch. To enable squelch connect JU2 between VCC and center pin and remove JU3. 7) Connect at +3.3V power supply to the +3.3V (J6) and GND (J10) terminals. Set the current limit to 150mA. Monitor the supply voltage at VCC (TP2). This is the supply that powers the chip. 3) Install shunt on TX_DISABLE (JU4) between GND (logic 0) and the center pin. This enables the output of the chip. 8) Apply a 500mVP-P differential signal to IN+ (J1) and IN- (J2). 4) Install shunt on IN_LEV (JU1) between GND (logic 0) and center pin. This disables the equalization at the input of the chip. 9) Using 50Ω cables, connect OUT+ (J3) and OUT(J4) to an oscilloscope with a 50Ω input terminations. 5) Install shunts on PE0 (JU5) and PE1 (JU6) between GND (logic 0) and the center pin. This sets the output preemphasis to a minimum. See Table 1 for a complete list of settings. ________________________________________________________________ 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. www.BDTIC.com/maxim 1 Evaluates: MAX3984 General Description Evaluates: MAX3984 MAX3984 Evaluation Kit Adjustment and Control Descriptions (see Quick Start first) COMPONENT NAME J1, J2 IN+, IN- FUNCTION Data Input. CML input that is internally terminated with 50 to VCC - 1.5V. J3, J4 OUT+, OUT- Data Output. CML output that is internally terminated with 50 to VCC. J6, J10 +3.3V, GND Connection for a +3.3V or +3.6V Power Supply. Set the current limit to 150mA. JU1 IN_LEV JU2 — LOS Pullup Termination. Connected to VCC terminates the LOS though a 4.7k resistor to VCC. Connected to TP5 terminates the LOS through a 4.7k resistor to +5.5V. JU3 — LOS Disable. Intalling jumper disable the LOS. Remove jumper for normal LOS operation. JU4 TX_DISABLE JU5 PE0 Preemphasis Control Least Significant Bit. See Table 1 for controls. JU6 PE1 Preemphasis Control Most Significant Bit. See Table 1 for controls. JU7 OUT_LEV TP1 LOS TP2, TP3 VCC, GND TP5 +5.5V Receive Equalization Control Input. Set to VCC (logic 1) for higher LOS assert/deassert levels and 10in FR-4 compensation. Set to GND (logic 0) for lower LOS assert/deassert levels and to bypass the FR-4 equalization. Tramsitter Disable. Set to GND (logic 0) for normal operation. Set to VCC (logic 1) or open to reduce the differential output to less than 10mVP-P. Output-Swing Control. Set to VCC (logic 1) or open for maximum output swing. Set to GND (logic 0) for reduced swing. Loss-of-Signal Output. Monitor with high-impedance probe. Connection for Monitoring VCC and GND Connection for Alternate Pullup Voltage for LOS Table 1. Preemphasis Settings 2 PE1 PE0 PREEMPHASIS (dB) 0 0 3.5 0 1 6.5 1 0 9.5 1 1 13 _______________________________________________________________________________________ www.BDTIC.com/maxim MAX3984 Evaluation Kit Evaluates: MAX3984 SUPPLY VOLTAGE: ATTACH +3.3V TO +3.6V SUPPLY. SELECTS PULLUP VOLTAGE FOR OPEN-COLLECTOR LOS OUTPUT. INSTALL JUMPER TO DISABLE SQUELCH. TRANSMIT DISABLE: SET TO LOGIC 0 NORMAL OPERATION. LOGIC 1 LOGIC 0 LOGIC 1 LOGIC 0 OUTPUT LEVEL: SET TO LOGIC 1 FOR HIGHER OUTPUT SWING. SET TO LOGIC 0 FOR LOWER OUTPUT SWING. PREEMPHASIS CONTROL: PE1 IS THE MOST SIGNIFICANT BIT, AND PE0 IS THE LEAST SIGNIFICANT BIT. SET PE1 = PE0 = LOGIC 1 FOR MAXIMUM PREEMPHASIS. Figure 1. MAX3984 EV Kit Quick Reference _______________________________________________________________________________________ www.BDTIC.com/maxim 3 Evaluates: MAX3984 MAX3984 Evaluation Kit TP5 +5.5V JU2 R1 4.7kΩ VCC VCC TP1 LOS JU1 IN_LEV JU4 TX_DISABLE JU3 VCC VCC 16 C3 0.1μF GND 1 C10 0.01μF J1 C4 0.01μF 2 IN+ J2 C5 0.01μF 15 14 IN_LEV LOS 13 C8 0.1μF TX_DISABLE VCC1 VCC2 IN+ OUT+ U1 12 C9 0.01μF C6 0.01μF 11 OUT+ C7 0.01μF MAX3984UTE+ 3 IN- 4 IN- OUT- GND GND OUT_LEV 5 PE1 PE0 GND 6 7 8 J3 10 J4 OUT- 9 VCC JU7 OUT_LEV JU6 PE1 JU5 PE0 J6 L1 4.7μH TP2 VCC VCC +3.3V J10 C1 33μF C2 0.1μF GND Figure 2. MAX3984 EV Kit Schematic 4 _______________________________________________________________________________________ www.BDTIC.com/maxim TP3 MAX3984 Evaluation Kit Evaluates: MAX3984 Figure 3. MAX3984 EV Kit Component Placement Guide—Component Side _______________________________________________________________________________________ www.BDTIC.com/maxim 5 Evaluates: MAX3984 MAX3984 Evaluation Kit Figure 4. MAX3984 EV Kit PCB Layout—Component Side, Layer 1 6 _______________________________________________________________________________________ www.BDTIC.com/maxim MAX3984 Evaluation Kit Evaluates: MAX3984 Figure 5. MAX3984 EV Kit PCB Layout—Ground Plane, Layer 2 _______________________________________________________________________________________ www.BDTIC.com/maxim 7 Evaluates: MAX3984 MAX3984 Evaluation Kit Figure 6. MAX3984 EV Kit PCB Layout—Power Plane, Layer 3 8 _______________________________________________________________________________________ www.BDTIC.com/maxim MAX3984 Evaluation Kit Evaluates: MAX3984 Figure 7. MAX3984 EV Kit PCB Layout—Bottom Side, Layer 4 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 _____________________ 9 © 2007 Maxim Integrated Products SPRINGER is a registered trademark of Maxim Integrated Products, Inc. www.BDTIC.com/maxim