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19-1983; Rev 0; 3/01
MAX9150 Evaluation Kit
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 (100 at each end of the differential bus for a total 50 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. o Two Independent Repeater Circuits o Link Testing with LVDS Signals o Supports Testing of Various Media Coax Cable with SMA Connectors Twisted-Wire Pair PC Board Trace o Independent Supplies Allow Common-Mode Testing o Low-Voltage, Low-Power Operation o Fully Assembled and Tested
Features
Evaluates: MAX9150
Component Suppliers
SUPPLIER AVX Kemet TDK PHONE 803-946-0690 864-963-6300 847-803-6100 FAX 803-626-3123 864-963-6521 847-803-6296 PART MAX9150EVKIT
Ordering Information
TEMP. RANGE 0C to +70C IC PACKAGE 28 TSSOP
Note: Please indicate that you are using the MAX9150 when contacting these component suppliers.
Component List
DESIGNATION C1, C11 QTY 2 DESCRIPTION 10F, 10V tantalum capacitors (B) AVX TAJB106M010 or Kemet T494B106K010AS 0.1F, 16V X7R ceramic capacitors (0603) TDK C1608X7R1C104KT or equivalent 0.01F, 50V X7R ceramic capacitors (0603) TDK C1608X7RH103KT or equivalent 49.9 1% resistors (0402) R11-R20, R33, R35, R36, R38, R39 R41, R42, R43 U1, U2 INA1, INB1, INA2, INB2 OUTA1, OUTB1, OUTA2, OUTB2 JU1, JU18 JU12-JU17, JU21-JU25 None 9 None None None 15 0 2 4 4 2 11 4 1 1 1 100 1% resistors (0402) Not installed (0805) MAX9150EUI (28-pin TSSOP) SMA PC-mount edge connectors SMA PC-mount connectors 3-pin headers 2-pin headers Shunts (JU1, JU16, JU17, JU18) MAX9150 PC board MAX9150 data sheet MAX9150 EV kit data sheet
C2, C5, C6, C12, C15, C16
6
C3, C4, C13, C14
4
R1, R2, R21, R22, R31, R32, R34, R37, R40
________________________________________________________________ Maxim Integrated Products
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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.
MAX9150 Evaluation Kit Evaluates: MAX9150
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)
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 50 and parallel terminate with a 100 resistor at the far end, for a total load of 50 (including the 100 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.
* *
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. 9) Enable the MAX9150 (U1) by connecting a shunt across pins 1 and 2 of jumper JU1. 10) Begin evaluating the output signals.
2
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MAX9150 Evaluation Kit
Detailed Description
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 100-impedance twisted-wire pair.
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.
Evaluates: MAX9150
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.
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 1&2 2&3 Closed JU14, JU23 Open Closed Open JU16 Open Closed Closed JU17 Open JU18 1&2 2&3 VCC1 and VCC2 power planes are isolated. PWRDN to VCC2. PWRDN to GND2. None. INA1, INB1, INA2, and INB2 SMA connectors are connected to a common-mode bypass network. None. VCC not connected. VCC to VCC1. VCC1 and VCC2 power planes are connected together. U1 and U2 receivers are terminated with 100 for an LVDS signal. Provides common-mode bypass to the input signal. Differential termination only. U1 is not connected to the power source. Power is supplied to U1. Operable with one power supply (a short is required at R41 pads to connect the grounds). Circuit 1 and circuit 2 require separate power supplies. U2 is enabled. U2 is disabled. PIN CONNECTION PWRDN to VCC1. PWRDN to GND1. INA1, INB1, INA2, and INB2 SMA connectors are terminated to ground with a 49.9 resistor. EV KIT OPERATION U1 is enabled. U1 is disabled. U1 and U2 inputs are terminated for single-ended input signals.
JU15, JU24
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MAX9150 Evaluation Kit Evaluates: MAX9150
are terminated with 50 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. 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.
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 (<1) 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
Terminations and Layout
All signal lines are 50 controlled-impedance traces. All of the differential output signal traces are terminated with 100 resistors, except the output at JU13, which is terminated with a 50 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 100 resistor at the far end of the wire.
Table 2. Circuit 2 Output Signals and Connections
DRIVER 1 2* 3* 4 5 NONINVERTING SIGNAL OUTA1 Pin 2, JU19 Pin 1, JU20 OUTA2 JU13 INVERTING SIGNAL OUTB1 Pin 1, JU19 Pin 2, JU20 OUTB2 JU13 CONNECTOR SMA connector Plated through holes for twistedwire pair Plated through holes for twistedwire pair SMA connector Differential signal probe pins
* Pin 3 can be used to connect the shield to ground.
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MAX9150 Evaluation Kit Evaluates: MAX9150
VCC1
JU17
VCC2
VCC1
JU16 C1 10F 10V
VCC
VCC2 C11 10F 10V
GND1
GND2 R41 OPEN
JU2 1 3 JU3 1 VCC1 PWRDN1 JU1 1 3 JU12 R1 49.9 1% 3 2 2 R11 100 1% 2 R12 100 1%
1
DO2+
U1 MAX9150
DO3+
28 R13 100 1% JU7 1 3
JU6 1 3
2
2 3
DO2DO1+
DO3DO4+
27 26
4 5 6
DO1PWRDN VSS
DO4DO5+
25 24
R14 100 1%
2
JU6 R15 100 1% 1 3 2
A INA1 SMA JU15 C6 0.1F INB1
DO57 JU14 JU21 VCC 8 9 C2 0.1F C3 0.01F 10 RIN+ RINGND VCC DO611 B 1 JU4 3 JU5 1 3 2 R19 100 1% 2 R20 100 1% DO10+ DO7+ VCC GND DO6+
23 22 21 20
C4 0.01F
C5 0.1F
VCC JU9 1 3
R2 49.9 1%
SMA
19 18
R16 100 1% JU10 1 3
2
12 13
DO10DO9+
DO7DO8+
17 16
R17 100 1%
2
14
DO9-
DO8-
15
R18 100 1%
1 3
JU11 2
Figure 1. MAX9150 EV Kit Schematic (Circuit 1)
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MAX9150 Evaluation Kit Evaluates: MAX9150
1 JU13 R32 49.9 1%
OUTA1 DO2+
U2 MAX9150
DO3+
28 R33 100 1% SMA OUTB1 SMA R34 49.9 1%
2 3
DO2DO1+
DO3DO4+
27 26
PWRDN2
VCC2 JU18 1 2 3
R31 49.9 1%
4 5 6
DO1PWRDN VSS
DO4DO5+
25 24
INA2 SMA JU24 C16 0.1F INB2 SMA R21 49.9 1%
JU22 7 JU23 JU25 VCC2 8 9 C12 0.1F C13 0.01F 10
DO5RIN+ RINGND VCC DO611 R40 49.9 1% DO10+ DO7+ VCC GND DO6+
23 22 21 20
R35 100 1%
1
23 JU19 VCC2
C14 0.01F
C15 0.1F JU20 1 2 3
R22 49.9 1%
19 18
R36 100 1%
R42 OPEN A R43 OPEN B
12 13
DO10DO9+
DO7DO8+
17 16
R37 49.9 1% SMA OUTA2 R38 100 1% SMA OUTB2
R39 100 1%
14
DO9-
DO8-
15
Figure 2. MAX9150 EV Kit Schematic (Circuit 2)
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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
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MAX9150 Evaluation Kit Evaluates: MAX9150
1.0"
1.0"
Figure 5. MAX9150 EV Kit PC Board Layout--Ground Planes
Figure 6. MAX9150 EV Kit PC Board Layout--Power Planes
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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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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