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19-2789; Rev 1; 6/03
MAX3803 Evaluation Kit
________________ General Description
The MAX3803 dc-coupled evaluation kit (EV kit) simplifies evaluation of the MAX3803 2.488Gbps to 3.125Gbps equalizer. The EV kit enables full testing of all the device's functions. SMA connectors with 50 controlled-impedance transmission lines to the MAX3803 are provided for all CML input and output ports.
_________________________ Features

Independent Input and Output Voltage Terminations SMA Connectors for All High-Speed Inputs and Outputs Fully Assembled and Tested
Evaluates: MAX3803
_______________ Ordering Information
PART MAX3803EVKIT TEMP. RANGE 0C to +85C IC PACKAGE 5X4 UCSP
________________________ Quick Start
Note: The MAX3803 EV kit is a dc-coupled evaluation board with 50 input and output terminations to VTI and VTO, respectively. Care must be taken to ensure that no direct short exists between the supply voltage and supply ground. Normal dccoupled operation with all positive supplies causes permanent damage to laboratory test equipment because a dc path exists from the power supply to the ports of the oscilloscope or BERT. The MAX3803 EV kit must be operated from a negative VEE supply when DC-coupled to standard lab equipment. External ac-coupling capacitors should be used when connecting to standard lab equipment and when VEE (J11) and the EV kit's GND (J2) are at the same potential.
____________________ Component List
DESIGNATION C2-C7, C9, C12C14 C1, C8, C10, C11 J1, J2, J9-J11, TP1, TP4-TP6 TP2, TP3 J3-J8 J15-J17 J18, J19 L1-L4 U1 QTY 10 4 9 2 6 3 2 4 1 DESCRIPTION 0.1F 10% Ceramic Capacitor (0402) 33F 10% Electrolytic Capacitor (B CASE) Test Point Not Installed SMA Connector EDGE MOUNT (TAB CONTACT) 1X2 Pin Header (0.1" centers) 1X3 Pin Header (0.1" centers) 1H Chip Inductor (0805) 3) MAX3803 5X4UCSP 1) 2)
Do not turn on the power supply until step 6. Connect a -3.3V power supply to J11 (VEE). Connect the power supply ground to J2 (GND) and J1 (VCC). Remove shunt on J15; install shunts on J16, 17, and center pin to VCC on J18. Apply a differential 1Gbps to 3.2Gbps input signal (400mVP-P to 1000mVP-P) between SMA connectors to FR4 board with length between 10in and 40in. Connect the output of the FR4 board to the J3 and J4 (IN+) inputs. Attach a differential high-speed oscilloscope with a 50 input to SMA connectors J5 and J6 (OUT+) to observe the output of the equalizer. Turn on power supply.
______________ Component Suppliers
SUPPLIER Digi-Key Murata Coilcraft AVX PHONE 218-681-6674 814-237-1431 847-639-6400 803-946-0690 FAX 218-681-3380 814-238-0490 847-639-1469 803-626-3123
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Note: Please indicate that you are using the MAX3803 when ordering from these suppliers.
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_________________________________________________________________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.
MAX3803 Evaluation Kit Evaluates: MAX3803
__________________________Alternative Supply Configurations
DC-Coupled Chip-to-Chip Operation
This setup allows testing of the MAX3803 in the final system. Remove shunts on J16 and J17; install a shunt on J15 and center pin to VCC on J18. Connect the VTI (J10) pin to the CML supply voltage output termination of the previous chip (transmitter). Connect the VTO (J9) pin to the CML supply voltage input termination of the following chip (receiver). Connect a 3.3V power supply on the VCC (J1) pin. Connect the supply ground to GND (J2). Insure that VCC, VTI, and VTO share a common ground. VTI and VTO can be at different voltages.
DC-Coupled Operation with Laboratory Equipment
This setup allows testing of the MAX3803 with standard lab equipment (BERT, oscilloscope, etc.). Remove shunt on J15; install shunts on J16, J17, and center pin to VCC on J18. Connect VCC (J1) pin to +2.2V power supply. Connect a -1.1V supply to VEE (J11). This setup forces the VTI and VTO voltages to be the same at 1.1V with respect to VEE. The VTI and VTO voltages must remain the same in this configuration, but the level can change by varying VCC and VEE. Insure that the difference between VCC and VEE is between 3.0V and 3.6V.
AC-Coupled Operation
This setup allows testing of the MAX3803 in ac-coupled operation. Remove shunts on J16 and J17; install shunts on J15 and center pin to VCC on J18. Install external AC-coupling capacitors to IN+ (J3, J4) and OUT+ (J5, J6). Connect VCC (J1), VTI (J10), and VTO (J9) to the same power supply between 3.0V and 3.6V. Connect the ground to GND (J2).
Figure 1. MAX3803 EV Kit Schematic
Jumper J18
When the inputs to the MAX3803 are AC-coupled, or when VEE is connected to GND connect the center pin to VCC to enable the output stage. Connect the center pin to GND to disable the output stage. For all other cases, connect the center pin to VCC to enable the output stage. Connect the center pin to VEE using a wire to disable the output stage.
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MAX3803 Evaluation Kit Evaluates: MAX3803
Figure 2. MAX3803 Component Placement Guide
Figure 3. MAX3803 PC Board Layout - Component Side
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MAX3803 Evaluation Kit Evaluates: MAX3803
Figure 4. MAX3803 PC Board Layout - Ground Plane
Figure 5. MAX3803 PC Board Layout - Power Plane
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MAX3803 Evaluation Kit Evaluates: MAX3803
Figure 6. MAX3803 PC Board Layout - 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 ________________ 5
2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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