19-1983; Rev 0; 3/01 MAX9150 Evaluation Kit Features ♦ Two Independent Repeater Circuits ♦ Link Testing with LVDS Signals ♦ Supports Testing of Various Media Coax Cable with SMA Connectors Twisted-Wire Pair PC Board Trace ♦ Independent Supplies Allow Common-Mode Testing ♦ Low-Voltage, Low-Power Operation ♦ Fully Assembled and Tested Component Suppliers SUPPLIER Ordering Information PHONE FAX PART TEMP. RANGE AVX 803-946-0690 803-626-3123 MAX9150EVKIT 0°C to +70°C Kemet 864-963-6300 864-963-6521 TDK 847-803-6100 847-803-6296 IC PACKAGE 28 TSSOP Note: Please indicate that you are using the MAX9150 when contacting these component suppliers. Component List DESIGNATION QTY DESCRIPTION C1, C11 2 10µF, 10V tantalum capacitors (B) AVX TAJB106M010 or Kemet T494B106K010AS C2, C5, C6, C12, C15, C16 C3, C4, C13, C14 R1, R2, R21, R22, R31, R32, R34, R37, R40 6 4 9 0.1µF, 16V X7R ceramic capacitors (0603) TDK C1608X7R1C104KT or equivalent 0.01µF, 50V X7R ceramic capacitors (0603) TDK C1608X7RH103KT or equivalent 49.9Ω ±1% resistors (0402) R11–R20, R33, R35, R36, R38, R39 15 100Ω ±1% resistors (0402) R41, R42, R43 0 Not installed (0805) U1, U2 2 MAX9150EUI (28-pin TSSOP) INA1, INB1, INA2, INB2 4 SMA PC-mount edge connectors OUTA1, OUTB1, OUTA2, OUTB2 4 SMA PC-mount connectors JU1, JU18 2 3-pin headers JU12–JU17, JU21–JU25 11 2-pin headers None 4 Shunts (JU1, JU16, JU17, JU18) None 1 None 1 MAX9150 PC board MAX9150 data sheet None 1 MAX9150 EV kit data sheet ________________________________________________________________ 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 Evaluates: MAX9150 General Description The MAX9150 evaluation kit (EV kit) is a fully assembled and tested circuit board that simplifies the evaluation of the MAX9150 400Mbps, 10-port low-voltage differential signaling (LVDS) repeater. The MAX9150 accepts an LVDS signal and repeats it on 10 outputs. Output levels are LVDS into a double-terminated bus (100Ω at each end of the differential bus for a total 50Ω load). The EV kit contains two independent circuits, each with a MAX9150 repeater, that can be linked using various media or tested independently. The outputs can be sampled through SMA connectors or category-5 twisted-wire pair. The two circuits on the EV kit require +3.3V power supplies to operate. Evaluates: MAX9150 MAX9150 Evaluation Kit Recommended Equipment • DC power supplies: +3.3V ±0.3V, 200mA +3.3V ±0.3V, 200mA • Pulse generator for LVDS signal input (e.g., HP 8131A) • Oscilloscope (e.g., Tektronix 11801C) Quick Start The MAX9150 EV kit is a fully assembled and tested surface-mount board. The EV kit contains two test circuits. Circuit 1, located on the lower half of the board, as shipped, is optimized for connection of category-5 cable. Circuit 2, located on the upper half of the board, is configured for direct probing, category-5, and coax cable connections. Circuit 1 (Bottom Circuit) Follow the steps below for circuit 1 operation. Do not turn on power supplies or enable pulse generator until all connections are completed: 1) Connect one +3.3V power supply to VCC1. Connect the ground terminal of this supply to GND1. 2) Set the pulse generator to generate an LVDS signal (this requires a noninverting and an inverting signal output from the pulse generator). For a nominal LVDS output, program two complementary singleended signals that transition between 1.375V and 1.025V with approximately 1ns transition time. Transition times should be matched to within 100ps. 3) Install a shunt on jumper JU16. 4) Connect the signal from the pulse generator to the input of circuit 1 (connect the noninverting signal to SMA connector INA1 and the inverting signal to SMA connector INB1). 5) Set the oscilloscope for LVDS signal input. 6) An oscilloscope probe can be used to confirm the output signals at JU2–JU11. On connectors JU2–JU11, pin 1 is the noninverting output and pin 2 is the inverting output. Pin 3 is a ground connection. 7) Turn on the power supply. 8) Enable the pulse generator. Circuit 2 (Top Circuit) Follow the steps below for circuit 2 operation. Do not turn on power supplies or enable pulse generator until all connections are completed: 1) Connect one +3.3V power supply to VCC2. Connect the ground terminal of this supply to GND2. 2) Set the pulse generator to generate an LVDS signal (this requires a noninverting and an inverting signal output from the pulse generator). For a nominal LVDS output, program two complementary singleended signals that transition between 1.375V and 1.025V with approximately 1ns transition time. Transition times should be matched to within approximately 100ps. 3) Connect the signal from the pulse generator to the input of circuit 2 (connect the noninverting signal to SMA connector INA2 and the inverting signal to SMA connector INB2). 4) Set the oscilloscope for LVDS signal input. 5) Connect the oscilloscope to the LVDS output signal at the following connectors: a. To evaluate the signal with coax cable, connect to SMA connectors OUTA1 (noninverting) and OUTB1 (inverting), or to OUTA2 (noninverting) and OUTB2 (inverting). Use coax cables with a characteristic impedance of 50Ω and parallel terminate with a 100Ω resistor at the far end, for a total load of 50Ω (including the 100Ω termination at the driver output, R33 or R38). b. An oscilloscope probe can be used to confirm the output signals at JU19 and JU20. For JU19, pin 2 is the noninverting and pin 1 is the inverting signal. For JU20, pin 1 is the noninverting and pin 2 is the inverting signal. Pin 3 of JU19 and JU20 is a ground connection. c. To evaluate with a differential probe, connect the probe across JU13. 6) Turn on the power supply. 7) Enable the pulse generator. 8) Enable the MAX9150 (U2) by connecting a shunt across pins 1 and 2 of jumper JU18. 9) Begin evaluating the output signals. 9) Enable the MAX9150 (U1) by connecting a shunt across pins 1 and 2 of jumper JU1. 10) Begin evaluating the output signals. 2 _______________________________________________________________________________________ MAX9150 Evaluation Kit The MAX9150 EV kit is a fully assembled and tested circuit board that simplifies the evaluation of the MAX9150 LVDS repeater. The MAX9150 accepts an LVDS input and repeats it on 10 output ports at a maximum rate of 400Mbps. The EV kit contains two independent circuits, each with a MAX9150 repeater. One circuit is located on the upper portion (circuit 2, Figure 2) and the other circuit on the lower portion (circuit 1, Figure 1) of the board. The two circuits can be linked by connecting an output signal from one circuit to the input of the second circuit. Individual outputs can be measured through coax cable with SMA connectors or 100Ω-impedance twisted-wire pair. Power Supplies The MAX9150 EV kit contains two separate circuits with dedicated power and ground planes that can be operated independently. Independent power and ground planes allow measurements of circuit response to ground shift or other common-mode effects. Each circuit requires a +3.3V power supply that must be able to supply 200mA to each circuit. The board can be operated with a single +3.3V power supply (400mA) when evaluating the board in driver/receiver mode with a common ground. See the Driver/Receiver Circuit section. Input Signal The MAX9150 accepts an LVDS input. The differential high threshold is +100mV and the differential low threshold is -100mV. The input connectors for circuit 2 are SMA connectors labeled INA2 (noninverting) and INB2 (inverting). The input connectors for circuit 1 are SMA connectors labeled INA1 (noninverting) and INB1 (inverting). The input signal can be monitored with a differential signal probe placed across jumpers JU22 and JU25 (circuit 2) or across jumpers JU12 and JU21 (circuit 1). Placing a shunt on jumper JU24 or JU15 increases the stability of the differential signal by filtering out common-mode AC signals. To monitor a single-ended input signal when operating circuit 2, place a shunt on JU23 and place a signal probe across jumper JU22 or jumper JU25. Similarly, when operating circuit 1, place a shunt on JU14 to monitor the single-ended input signal at jumper JU12 or JU21. See Table 1 for jumper settings. Output Signal The MAX9150 accepts one LVDS signal at its input and repeats it on 10 output ports with LVDS drivers. Each driver’s output signal is composed of noninverting and inverting signals. In circuit 2, five drivers can be accessed through different connectors—four drivers Table 1. Jumper Settings JUMPER JU1 STATUS PIN CONNECTION EV KIT OPERATION 1&2 PWRDN to VCC1. U1 is enabled. 2&3 PWRDN to GND1. U1 is disabled. INA1, INB1, INA2, and INB2 SMA connectors are terminated to ground with a 49.9Ω resistor. U1 and U2 inputs are terminated for single-ended input signals. None. U1 and U2 receivers are terminated with 100Ω for an LVDS signal. INA1, INB1, INA2, and INB2 SMA connectors are connected to a common-mode bypass network. Provides common-mode bypass to the input signal. Closed JU14, JU23 Open JU15, JU24 JU16 Closed Open None. Differential termination only. Open VCC not connected. U1 is not connected to the power source. Closed VCC to VCC1. Power is supplied to U1. Closed VCC1 and VCC2 power planes are connected together. Operable with one power supply (a short is required at R41 pads to connect the grounds). Open VCC1 and VCC2 power planes are isolated. Circuit 1 and circuit 2 require separate power supplies. 1&2 PWRDN to VCC2. U2 is enabled. 2&3 PWRDN to GND2. U2 is disabled. JU17 JU18 _______________________________________________________________________________________ 3 Evaluates: MAX9150 Detailed Description Evaluates: MAX9150 MAX9150 Evaluation Kit are terminated with 50Ω resistors, and one driver can be connected to circuit 1’s receiver. Of the five accessible drivers, two connect to SMA connectors, two can connect to shielded twisted-wire pair, and the fifth driver can be monitored with a differential signal probe. See Table 2 for the location of output signals, their corresponding drivers, and the type of connection required. The 10 drivers of circuit 1 can be accessed at connectors JU2–JU11 with shielded twisted-pair cable. Pin 1 is the noninverting signal, pin 2 is the inverting signal of connectors JU2–JU11, and pin 3 can be used to connect the cable’s shield to ground. Driver/Receiver Circuit A circuit 2 driver can be used to drive the receiver of circuit 1. In this mode, the two circuits’ power and ground planes can be joined to operate the entire board with a single power supply. Use a 400mA supply in this joined mode. To join the two power and two ground planes, install a shunt across jumper JU17 and solder a short, or low-value (<1Ω) resistor across the R41 pads. To drive the receiver of circuit 1, connect a differential output signal pair (OUTA1/OUTB1, OUTA2/OUTB2, JU19, or JU20) to the SMA input connectors of circuit 1 (INA1/INB1). See Table 2 to match the noninverting and inverting outputs and inputs. An alternate way of operating the board in driver/receiver mode is by bridging the PC board traces from the driver in circuit 2 to the receiver in circuit 1. To bridge the PC board trace connections, solder a short across R42 and R43 pads. Note: Verify that a shunt is not placed on JU14 when circuit 1 is receiving an LVDS signal from circuit 2 to prevent overloading the LVDS driver. MAX9150 Enable/Disable The MAX9150 is enabled by applying a logic high to the PWRDN pin and is disabled by applying a logic low. On the MAX9150 EV kit, this can be accomplished by configuring JU18 for circuit 2, or JU1 for circuit 1. To enable the respective circuit, install a shunt across pins 1 and 2 of the jumper. To disable the circuit, install the shunt across pins 2 and 3. See Table 1 for jumper settings. The circuits can also be enabled and disabled by applying a CMOS logic signal to the PWRDN1 pad or PWRDN2 pad. Note: If a CMOS logic signal is connected to the PWRDN1 or PWRDN2 pad, verify that shunts are not installed on the respective jumper. Terminations and Layout All signal lines are 50Ω controlled-impedance traces. All of the differential output signal traces are terminated with 100Ω resistors, except the output at JU13, which is terminated with a 50Ω resistor. Each differential output pair is laid out with equal trace length having a maximum length difference of 13mils. To minimize noise interference, the EV kit is a four-layer board. When testing a twisted-wire pair, terminate with a 100Ω resistor at the far end of the wire. Table 2. Circuit 2 Output Signals and Connections DRIVER NONINVERTING SIGNAL INVERTING SIGNAL 1 OUTA1 OUTB1 CONNECTOR 2* Pin 2, JU19 Pin 1, JU19 Plated through holes for twistedwire pair 3* Pin 1, JU20 Pin 2, JU20 Plated through holes for twistedwire pair 4 OUTA2 OUTB2 5 JU13 JU13 SMA connector SMA connector Differential signal probe pins * Pin 3 can be used to connect the shield to ground. 4 _______________________________________________________________________________________ MAX9150 Evaluation Kit VCC2 JU17 VCC1 VCC JU16 VCC2 C1 10µF 10V GND1 Evaluates: MAX9150 VCC1 C11 10µF 10V GND2 R41 OPEN JU2 1 1 R12 100Ω 1% 2 3 3 JU3 1 VCC1 PWRDN1 JU1 1 2 3 R11 100Ω 1% 4 5 2 3 A 2 6 JU12 INA1 DO2+ U1 DO3+ MAX9150 DO2DO1+ DO3DO4+ DO1- DO4- PWRDN DO5+ R1 49.9Ω 1% JU15 C6 0.1µF INB1 R2 49.9Ω 1% 7 8 JU14 9 JU21 VCC C2 0.1µF C3 0.01µF 10 SMA RIN+ VCC RIN- GND GND DO6+ VCC DO6- 11 B 1 JU4 R20 100Ω 1% 2 3 JU5 1 3 2 12 13 R19 100Ω 1% 14 27 25 DO10+ DO7+ DO10- DO7- DO9+ DO8+ DO9- DO8- JU6 1 R13 100Ω 1% 26 R14 100Ω 1% 23 2 3 JU7 1 2 3 24 VSS DO5- SMA 28 JU6 1 R15 100Ω 1% 2 3 22 21 C4 0.01µF C5 0.1µF VCC 20 19 18 17 JU9 1 R16 100Ω 1% R17 100Ω 1% JU10 1 2 3 16 15 R18 100Ω 1% 2 3 1 JU11 2 3 Figure 1. MAX9150 EV Kit Schematic (Circuit 1) _______________________________________________________________________________________ 5 Evaluates: MAX9150 MAX9150 Evaluation Kit 1 R32 49.9Ω 1% JU13 2 3 PWRDN2 R31 49.9Ω 1% VCC2 JU18 1 2 4 5 3 6 JU22 INA2 OUTA1 DO2+ U2 DO3+ MAX9150 DO2- DO3- DO1+ DO4+ DO1- DO4- PWRDN DO5+ JU24 C16 0.1µF INB2 R21 49.9Ω 1% R22 49.9Ω 1% 7 8 JU23 9 JU25 VCC2 C12 0.1µF C13 0.01µF 10 SMA RIN+ VCC RIN- GND GND DO6+ VCC DO6- 11 R42 OPEN R40 49.9Ω 1% 13 A R43 OPEN B 12 R39 100Ω 1% 14 27 DO10+ DO7+ DO10- DO7- DO9+ DO8+ DO9- DO8- SMA R33 100Ω 1% OUTB1 SMA 26 25 R34 49.9Ω 1% 24 VSS DO5- SMA 28 23 R35 100Ω 1% 1 VCC2 22 21 C14 0.01µF C15 0.1µF 20 19 R36 100Ω 1% JU20 1 2 3 18 17 R37 49.9Ω 1% SMA OUTA2 16 15 R38 100Ω 1% SMA OUTB2 Figure 2. MAX9150 EV Kit Schematic (Circuit 2) 6 2 3 JU19 _______________________________________________________________________________________ MAX9150 Evaluation Kit Evaluates: MAX9150 1.0" 1.0" Figure 3. MAX9150 EV Kit Component Placement Guide— Component Side Figure 4. MAX9150 EV Kit PC Board Layout—Component Side _______________________________________________________________________________________ 7 Evaluates: MAX9150 MAX9150 Evaluation Kit 1.0" Figure 5. MAX9150 EV Kit PC Board Layout—Ground Planes 8 1.0" Figure 6. MAX9150 EV Kit PC Board Layout—Power Planes _______________________________________________________________________________________ MAX9150 Evaluation Kit Evaluates: MAX9150 1.0" 1.0" Figure 7. MAX9150 EV Kit PC Board Layout—Solder Side Figure 8. MAX9150 EV Kit Component Placement Guide— 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. 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