19-2179; Rev 0; 10/01 MAX3971 Evaluation Kit The MAX3971 evaluation kit (EV kit) simplifies evaluation of the MAX3971 10.3Gbps limiting amplifier. The EV kit enables testing of all the device’s functions. SMA connectors with 50Ω controlled-impedance connections to the MAX3971 are provided for all data input and output ports to facilitate connection to high-speed test equipment. Features ♦ SMA Connectors for All High-Speed Inputs and Outputs ♦ Fully Assembled and Tested ♦ Single 3.3V Power Supply Ordering Information Component List DESIGNATION QTY DESCRIPTION C1–C4 4 0.001µF ±10% ceramic capacitors (0402) Murata GRM36X7R102K050AD C6, CZ 2 0.1µF ±10% ceramic capacitors (0603) Murata GRM39X7R104K016AD 1 2.2µF ±10% ceramic capacitor (1206) Murata GRM42-6X7R225K016AD C8 1 33µF ±10% tantalum capacitor AVX TAJC336K010 C9, C16–C21 0 Open 4 0.1µF ±10% ceramic capacitors (0402) Murata GRM36X5R104K010AD J1–J4 4 SMA connectors (edge-mount, tab contact) J6, J7 2 Test points Digi-Key 5000K-ND J8–J14 0 Open JU1 1 1 × 3-pin header (0.1in center) C7 C11–C14 L1 1 Murata BLM11HA102SG R3, R4 0 Open U1 1 MAX3971UGP (20 QFN) None 1 Shunt None 1 MAX3971 evaluation circuit board, Rev B None 1 MAX3971 data sheet PART MAX3971EVKIT TEMP RANGE 0°C to +85°C IC PACKAGE 20 QFN* *Exposed paddle Component Suppliers SUPPLIER PHONE FAX AVX 843-444-2863 843-626-3123 Murata 415-964-6321 415-964-8165 Note: Please indicate that you are using the MAX3971 when contacting these component suppliers. Quick Start 1) Connect a 3.3V power supply to J6 (VCC). Connect the power supply ground to J7. 2) Connect a differential or single-ended input signal (differential voltage amplitude between 10mVp-p and 800mVp-p) to the inputs (IN+ and IN-) by using SMA cables suitable for 10.3GHz use. 3) Connect a 50Ω oscilloscope to the SMA connectors J3 and J4 (OUT+, OUT-) to observe the output of the limiter. The output signal is approximately 200mVp-p to 400mVp-p differential. 4) To disable the output signals OUT+ and OUT-, jumper the three-pin header JU1 from the center pin (pin 2) to VCC (pin 1). To enable the output signals, jumper should be from pin 2 to ground (pin 3). Notes 1) At high frequencies such as from 1GHz to 10GHz, delays with the board and cables affect measurements. Mismatches in cables can cause significant measurement errors. Edge speeds are best observed by using single-ended methods. Careful calibration of cables, attenuators and the board is necessary. ________________________________________________________________ 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: MAX3971 General Description Evaluates: MAX3971 MAX3971 Evaluation Kit R3 OPEN C21 OPEN J13 OPEN C20 OPEN VCC VCC J6 R4 OPEN VCC L1 C7 2.2µF J7 C11 0.1µF J1 20 VCC 1 JU1 C9 OPEN 19 CZ- 18 CZ+ 17 16 VCC DISABLE U1 IN+ VCC 15 C3 0.001µF 14 C13 0.1µF OUT- 13 C14 0.1µF VCC GNDIN+ 2 IN+ OUT+ J2 3 IN- J9 OPEN J10 OPEN C16 OPEN C17 OPEN C18 OPEN CALIBRATION STRIP C19 OPEN VCC MAX3971 INC12 0.1µF VCC J8 OPEN C6 0.1µF GND J14 OPEN C2 0.001µF C1 0.001µF C8 33µF VCC CZ 0.1µF 4 GNDIN- VCC 12 5 N.C. GND 11 GND 6 N.C. 7 GND 8 N.C. 9 C4 0.001µF N.C. 10 J11 OPEN J12 OPEN Figure 1. MAX3971 EV Kit Schematic 2 _______________________________________________________________________________________ J3 OUT+ J4 OUT- MAX3971 Evaluation Kit Evaluates: MAX3971 1.0" 1.0" Figure 2. MAX3971 EV Kit Component Placement Guide— Component Side Figure 3. MAX3971 EV Kit PC Board Layout—Component Side _______________________________________________________________________________________ 3 Evaluates: MAX3971 MAX3971 Evaluation Kit 1.0" Figure 4. MAX3971 EV Kit PC Board Layout—Ground Plane 4 1.0" Figure 5. MAX3971 EV Kit PC Board Layout—Power Plane _______________________________________________________________________________________ MAX3971 Evaluation Kit Evaluates: MAX3971 1.0" Figure 6. MAX3971 EV Kit PC Board Layout—Solder Side _______________________________________________________________________________________ 5 Evaluates: MAX3971 MAX3971 Evaluation Kit LAYER PROFILE EV3971 REV B EVALUATION BOARD THIS IS A 50Ω CONTROLLED-IMPEDANCE BOARD. THE LAYER PROFILE IS BASED ON THE FOLLOWING ASSUMPTIONS: 1) DIELECTRIC MATERIAL IS ROGERS 4350 WITH A DIELECTRIC CONSTANT OF ~ 3.48 2) 1oz COPPER FOIL 3) SINGLE-ENDED TRACE WIDTH 21.5MIL 4) DIFFERENTIAL AS FOLLOWS: 10MIL 5MIL 10MIL 10 MIL ROGERS CORE AS NEEDED 10 MIL ROGERS Figure 7. MAX3971 EV Kit PC Board Layer Profile 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 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.