 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| 19-2602 Rev 0; 10/02 MAX3669ETG Evaluation Kit General Description The MAX3669ETG evaluation kit (EV kit) is an assembled demonstration board that provides easy optical or electrical evaluation of the MAX3669ETG, a 622Mbps laser driver with current monitors and automatic power control (APC) circuitry. Although the MAX3669ETG EV kit is shipped in the electrical configuration, this EV kit also provides configuration instructions for optical operation. o Fully Assembled and Tested o +3.3V or +5V Operation o On-Board Input Termination o Independent Electrical Monitoring of Modulation and Bias Currents Features Evaluates: MAX3669ETG Component Suppliers SUPPLIER AVX Coilcraft Murata Zetex PHONE 843-448-9411 847-639-6400 770-436-1300 631-360-2222 FAX 843-448-1943 847-639-1469 770-436-3030 631-360-8222 PART MAX3669ETGEVKIT Ordering Information TEMP RANGE -40C to +85C IC PACKAGE 24 QFN Note: Please indicate that you are using the MAX3669ETG when contacting these component suppliers. Component List for Electrical Configuration DESIGNATION C1, C2, C6, C12, C20 C4, C7, C10, C11 C5 C8 C16 QTY 5 4 1 1 1 DESCRIPTION 0.01F 10% ceramic capacitors (0402) 1F 10% ceramic capacitors (0603) Do not install 100pF 10% ceramic capacitor (0402) 0.1F 10% ceramic capacitor (0603) 10F 10%, 10V min tantalum capacitor, case B AVX TAJC106K016 5pF 5% ceramic capacitor (0402) LED SMA connectors, edge mount 1.2H inductor Coilcraft 1008LS-122XKBC 2-pin header, 0.1in centers Shunt for P1 PNP transistor Zetex FMMT591A 1.5k 5% resistors (0402) 1k 5% resistor (0603) 12.4 1% resistor (0402) None 1 DESIGNATION R6, R7, R21 R8, R9 R10, R11 R12 R13, R22 R14 R15 R16 R18 R20 R23 R26, R28 R27, R29 VCC, GND, TP1, TP4, TP5, TP6, TP8-TP11 U1 U3 None QTY 3 2 2 1 2 1 1 1 1 1 1 2 2 10 1 1 1 DESCRIPTION 84.5 1% resistors (0603) 124 1% resistors (0603) 20 1% resistors (0402) 10 1% resistor (0402) 0 resistors (0603) 50k variable resistor Bourns 3296W 200k variable resistor Bourns 3296W 100k variable resistor Bourns 3296W 110 5% resistor (0603) 0 resistor (0402) 15 5% resistor (0603) 392 1% resistors (0402) Do not install Test points MAX3669ETG (24-pin QFN) MAX495ESA (8-pin SO) MAX3669 data sheet MAX3669ETG EV kit PC board, rev A C19 C21 D1 J1, J2, J3 L3 P1 None Q1 R1, R2, R24 R3 R5 1 1 1 3 1 1 1 1 3 1 1 ________________________________________________________________ Maxim Integrated Products 1 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. MAX3669ETG Evaluation Kit Evaluates: MAX3669ETG Component Modifications for Optical Configuration DESIGNATION J3 L2 R5 R13 R19 R20 R22 R23 U2 QTY 1 1 1 1 1 1 1 1 1 Remove Ferrite bead Murata BLM18HG601SN1 Remove Remove 20 5% resistor (0402) 5 5% resistor (0402) Remove Remove User-supplied laser diode DESCRIPTION 8) Attach a high-speed oscilloscope with 50 inputs to J3. 9) Adjust RBIASMAX (R15) and RAPCSET (R16) until the desired laser-bias current is achieved (refer to the note in the Applications Information section of the MAX3669 data sheet). 10) Adjust RMODSET (R14) until the desired laser-modulation current is achieved. Note: See the Adjustment and Control Descriptions table. Optical Setup For optical operation, the electrical APC test circuit must be disabled. For optical evaluation of the MAX3669ETG, configure the EV kit as described in Component Modifications for Optical Configuration: 1) Remove the shunt from P1 to enable the output. 2) Connect a TO-style header laser and monitor diode (Figure 1) as follows: * Keeping the leads to the laser diode as short as possible, connect the laser diode on the component side of the board between R20 and VCC with the cathode connected to R20 and the anode connected to VCC. * Connect the monitor diode on the underside of the the board with the anode connected to the MAX3669ETG's MD pin and the cathode connected to VCC. Note: When performing resistance checks, manually set the ohmmeter to a high range to avoid forward biasing the on-chip ESD protection diodes. 3) Adjust R14, the MOD (RMODSET) potentiometer, for maximum resistance between pins 2 and 3 (test point 5 and ground). 4) Adjust R15, the BIAS (RBIASMAX) potentiometer, for maximum resistance between pins 2 and 3 (test point 4 and ground). 5) Adjust R16, the APC (RAPCSET) potentiometer, for desired optical power. (Refer to the Design Procedure section of the MAX3669 data sheet.) 6) Power up the board with a +3.3V supply. 7) Apply a differential input signal (800mV per side) to J1 and J2 (DATA+ and DATA-). 8) Attach the laser-diode output to an optical/electrical converter. Quick Start Electrical Setup (Default) In the electrical configuration, an APC test circuit is included to emulate a semiconductor laser with a monitor photodiode. Monitor diode current is provided by Q1, which is controlled by an operational amplifier (U3). The APC test circuit, consisting of U3 and Q1, applies the simulated monitor diode current to the MAX3669ETG's MD pin. The ratio of IBIAS / IMD is R24 / R23 = 100. To ensure proper operation in the electrical configuration, set up the evaluation board as follows: 1) Verify inductor L2 is not installed. 2) Remove the shunt from P1 to enable the output. Note: When performing the following resistance checks, manually set the ohmmeter to a high range to avoid forward biasing the on-chip ESD protection diodes. 3) Adjust R14, the MOD (RMODSET) potentiometer, for 10k resistance between pins 2 and 3 (test point 5 and ground). 4) Adjust R15, the BIAS (RBIASMAX) potentiometer, for 10k resistance between pins 2 and 3 (test point 4 and ground). 5) Adjust R16, the APC (RAPCSET) potentiometer, for 10k resistance between pins 2 and 3 (test point 6 and ground). 6) Power up the board with a +3.3V supply. 7) Apply a differential input signal (max amplitude 800mV per side) to J1 and J2 (DATA+ and DATA-). 2 _______________________________________________________________________________________ MAX3669ETG Evaluation Kit 9) Adjust R15 until LED D1 is no longer illuminated. Laser power can be monitored at the laser diode with an optical/electrical converter (refer to the note in the Applications Information section of the MAX3669 data sheet). 10) Adjust R14 until the desired optical amplitude is achieved. Optical amplitude can be observed on an oscilloscope connected to an optical/electrical converter. Evaluates: MAX3669ETG Adjustment and Control Descriptions See Quick Start first. COMPONENT D1 J3 P1 R14 R15 R16 TP1 NAME APC Fail Indicator LED Electrical Output SMA OUTPUT DISABLE RMODSET RBIASMAX RAPCSET Fail Indicator Test Point FUNCTION Refer to the Design section of the MAX3669 data sheet. Set APC current; then increase bias current until LED goes off (LED is illuminated when the APC loop is open and off when the APC loop is closed). Electrical output. Remove for optical operation. Enable/disable the output currents. Shunting disables the part. Remove shunt for normal operation. Laser modulation current adjustment Laser-bias current adjustment. In open-loop mode, R15 adjusts the laser-bias current. In closed-loop operation, R15 adjusts the maximum laser-bias current. Automatic power-control adjustment. For closed-loop operation, R16 adjusts the monitor-diode current level. TTL low level indicates a failure in the APC loop. _______________________________________________________________________________________ 3 MAX3669ETG Evaluation Kit Evaluates: MAX3669ETG CONFIGURATION 1 CONFIGURATION 2 TOP OF PC BOARD TOP OF PC BOARD VCC VCC L2 VCC VCC SOLDER BRIDGES TO-46 CAN LASER/PHOTODIODE PAIR BOTTOM OF PC BOARD SOLDER BRIDGES Figure 1. Attachment of Laser Diode/Monitor Diode to MAX3669ETG EV Kit 4 _______________________________________________________________________________________ L2 D3 L2 D3 D3 LD TO-46 CAN LASER/PHOTODIODE PAIR LD TO-46 CAN LASER/PHOTODIODE PAIR PD BOTTOM OF PC BOARD PD BOTTOM OF PC BOARD VCC VCC SOLDER BRIDGES VCC VCC CONFIGURATION 3 CONFIGURATION 4 TOP OF PC BOARD TOP OF PC BOARD L2 VCC VCC VCC VCC LD TO-46 CAN LASER/PHOTODIODE PAIR PD BOTTOM OF PC BOARD VCC VCC SOLDER BRIDGES D3 LD PD VCC VCC R16 100k RAPCSET CW R14 50k RMODSET CW R15 200k RBIASMAX TP4 VCC C1 0.01F MD TP5 R2 1.5k R3 1.0k 21 APCSET CAPC VCC TP6 C16 0.1F CW R1 1.5k 24 BIASMAX MODSET 23 GND 22 20 19 VCC C2VCC 1 VCC DATA+ GND MD 18 17 VCC 16 20 15 14 VCC 13 R10 20 C4 1F R11 R12 10 R20 0 C7 1F R19 OPEN C21 5pF BIAS J1 0.01F 2 3 DATAGND BIASMON MODMON ENABLE GND FAIL N.C. GND BIAS VCC OUT+ VCC C8 100pF DATA+ VCC 4 U1 R6 84.5 C10 1F R8 124 J2 VCC R26 392 5 6 TP8 OUT- R7 84.5 MAX3669ETG Figure 2. MAX3669ETG EV Kit Schematic--Electrical Configuration R9 124 R27 OPEN TP11 7 R29 OPEN P1 C5 OPEN VCC R18 110 VCC 2 1 Q1 3 C19 C12 10F 0.01F C20 0.01F MD BIAS DATA- C11 1F J3 OUT L2 OPEN VCC R28 392 8 TP1 9 10 11 12 VCC R5 12.4 R24 1.5k VCC TP10 D1 RED R21 84.5 P4 L3 1.2H 4 6 VCC R13 0 2 U3 3 7 C6 0.01F R23 15 TP9 VCC P5 Evaluates: MAX3669ETG _______________________________________________________________________________________ R22 0 GND MAX3669ETG Evaluation Kit 5 Evaluates: MAX3669ETG GND BIASMAX MODSET APCSET C2VCC 1 VCC DATA+ GND MD CAPC VCC 18 17 VCC VCC J1 0.01F 2 3 DATA- VCC MAX3669ETG Evaluation Kit ENABLE GND FAIL N.C. GND R28 392 7 R29 OPEN P1 TP1 C5 OPEN VCC R18 110 8 9 10 11 12 BIAS Figure 3. MAX3669ETG EV Kit Schematic--Optical Configuration CW R14 50k RMODSET CW R15 200k RBIASMAX TP4 VCC C1 0.01F MD 6 TP5 R2 1.5k 23 22 21 20 19 R3 1.0k TP6 C16 0.1F CW R1 1.5k 24 VCC C8 100pF R11 20 R7 84.5 VCC R26 392 5 BIASMON MODMON VCC OUT+ R16 100k RAPCSET DATA+ VCC 4 GND R6 84.5 C10 1F R8 124 U1 16 15 14 VCC 6 13 R10 20 R27 OPEN TP11 C4 1F J2 TP8 OUT- MAX3669ETG R12 10 C7 1F R20 5 R19 20 C21 5pF DATAR9 124 C11 1F VCC BIAS L2 VCC MURATA BLM18HG601SN1 TP10 VCC R5 OPEN D1 RED R24 1.5k R21 84.5 VCC P4 L3 1.2H C19 C12 10F 0.01F C20 0.01F 2 1 Q1 3 R13 OPEN MD _______________________________________________________________________________________ 6 VCC R23 TP9 OPEN 4 2 U3 3 7 C6 0.01F R22 OPEN BIAS VCC P5 GND MAX3669ETG Evaluation Kit Evaluates: MAX3669ETG 1.0" 1.0" Figure 4. MAX3669ETG EV Kit Component Placement Guide-- Component Side Figure 5. MAX3669ETG EV Kit PC Board Layout--Component Side 1.0" 1.0" Figure 6. MAX3669ETG EV Kit PC Board Layout--Solder Side Figure 7. MAX3669ETG EV Kit PC Board Layout--Ground Plane 7 _______________________________________________________________________________________ MAX3669ETG Evaluation Kit Evaluates: MAX3669ETG 1.0" Figure 8. MAX3669ETG EV Kit PC Board Layout--Power Plane 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. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
Price & Availability of MAX3669ETGEVKIT
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |