SY88973 MICREL | Alldatasheet

Document overview

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Technical content

Features

  • Allows for easy and fast evaluation of Micrel’s chipset for SFP module
  • On board FAULTs indicators
  • Easy access to the components for rework and different options implementation IC Description
  • SY88982: Low power small form factor (3mm x 3mm) laser driver up to 3.2Gbps data rate and 2.3V compliance voltage. SY88782 is a lower speed version up to 1.25Gbps.
  • MIC3001: SFP module controller featuring digital diagnostic monitoring interface as per SFF-8472 with internal/external calibration and full laser control with bias and modulation current compensation for temperature variations using look up tables.
  • SY88973: Multi-rate 155-3200Mbps low sensitivity limiting amplifier. Evaluation Board TOSA DFB / FP ROSA DRIVER INPUT L.A. OUTPUT To Computer Parallel Port

Table 1. Configuration Settings http://www.micrel.com/product-info/app_hints+notes.shtml. http://www.micrel.com/product-info/app_hints+notes.shtml. them accordingly to the diagrams shown on Figure 1. Figure 1. Mounting of Laser and Receive

Micrel TXRX_982_R1 Evaluation Board September 2004 M9999-092304 hbwhelp@micrel.com or (408) 955-1690 Set-Up and Operation Follow the step-by-step procedure to set-up the board safely and properly: 1. Connect the on board DB-25 connector to the parallel port of a computer. 2. Connect the differential input of the laser driver to DATA output of the pattern generator. 3. Use a multimode fiber jumper, with appropriate connectors to connect optical output of the VCSEL to a VOA (variable optical attenuator) preset to 0dB attenuation. 4. Connect the output of the VOA to the optical input of the DCA, power-meter, or optical to electrical converter. 5. Pre-adjust the power supply to 3.3V and turn it off. Connect TP3 to V CC (3.3V) and TP5 to GND, then turn the power supply ON. The total current drawn from the power supply should be less than 300mA. 6. Launch the MIC3000/1 software. The MIC3001 Optical Transceiver Management IC panel opens with Panels and Help grayed out and only Utilities can be run. 7. Refer to MIC3000/1 Software User’s Guide for the detailed settings. 8. On the main window select Utilities to open the utilities panel, then select SCAN to read the address of the MIC3001 and GET to read the manufacturer ID, Device ID, and Die Revision. If there is a failure in reading one of these parameters, you cannot proceed further. If all the parameters are read correctly, close the Utilities window to return to the main window where Panels and Help are no longer grayed out. 9. Select Panels to display the list of setting panels. 10. All the bits displayed on the panels can be read and/or modified on the panels or by accessing the registers directly by selecting ALL REGISTERS , enter the serial address, the register address, select GET to read the content or type a value and select SET NEW to write. In this procedure the bits are set on the panels. 11. Select OEM CONFIG 0-2 to open the OEM configuration registers 0, 1, and 2 windows. 12. In OEM Configuration Register 0 window, set ENABLE/DISABLE to DISABLE, VMOD REFERENCE to GND , and temperature zone to INTERNAL. 13. In OEM Configuration Register 1 window: a. Set APC OP-AMP TYPE to COMMON EMITTER. Note: Set the selection bit to 0, 0 should correspond to EMITTER FOLLOWER, which should be displayed on the bottom and COMMON EMITTER on the top. b. Select the voltage to report in VINH:VINL. c. Set Feedback voltage source to 1.22V. Set FEEDBACK BIAS REF and RES TERMINATION to GND and VBIAS DRIVE to SOURCE (NPN). Set INTERNAL FEEDBACK RESISTOR to an arbitrary value (1.6K for example). e. Set FEEDBACK BIAS REF and RES TERMINATION to GND and VBIAS DRIVE to SOURCE (NPN). f. Set INTERNAL FEEDBACK RESISTOR to arbitrary value (1.6K for example). 14. In OEM Configuration Register 2, the MIC3001 address and look-up table offset can be modified. The look-up table covers 128°C. The temperature range for offset = 0 is 0° to +127°C.) This range can be shifted down by 2x the value. The offset is set to. If offset = 15, the temperature range becomes –30° to +97°C. 15. In OEM Configuration Register 0 window, set ENABLE/DISABLE to ENABLE. 16. On Panels list select OEM CONFIG 3-4 and select EXTERNAL CALIBRATION (default setting), LOS COMPARATOR ENABLE, SHDN, RXLUT INPUT TEMPERATURE, and RSOUT. If needed, later set ISTART to a different value to speed up the APC loop during laser turn ON after a FAULT occurrence. Close the window to return to main window. 17. On Panels list, select External Calibration . Set all the offsets to 0 and slopes to 1. Set RX_PWR(1) to 1. These parameters might need to be changed later to correct the measured values (calibration). Return to the main window.

Micrel TXRX_982_R1 Evaluation Board September 2004 M9999-092304 hbwhelp@micrel.com or (408) 955-1690 18. On Panels list, select Temperature Compensation. Load look-up tables for APC, Modulation, Bias current Fault, and End-of- Life from appropriate files. If no loading is done, the default value 0 is used for all the LUT. Return to the main window. 19. On Panels list, select OEM settings. Enter the desired DAC values between 0 and 255 for the displayed parameters then select SET NEW. Select GET CURRENT to make sure that the set values are written into the registers. Checking them can mask the faults. Return to the main window. 20. On Panels list, select User. Check APC0 in the USER CONTROL REGISTER (default setting). All the other parameters can be checked later to verify their functionality. Return to the main window. 21. On Panels list, select Result. The values of the five monitored parameters as per SFF- 8472 are now displayed. Type the alarm and warning thresholds and select SET NEW LIMITS. Select GET CURRENT LIMITS to check that the set values are written into the registers. Return to main window. 22. Set modulation current and bias current to get the desired output power and extinction ratio out of the laser. Use OEM Settings panel or TX Setup panel to do that: In OEM settings window, set the bias by entering a value from 10 to 255 in APC SET POINT 0 box and modulation by entering a value from 10 to 255 in MOD DAC setting box followed by SET new. In TX calibration window, set the bias by entering a value from 10 to 255 in APCO (DEC) box and modulation by entering a value from 10 to 255 in MOD DAC setting box followed by SET new. After setting the new value for bias or modulation current, toggle TXDISABLE/TXENABLE on the main window. 23. At this step, there is no received power since no signal is applied at the input of the receiver. 24. Adjust the VOA to bring the optical power to the desired level at the input of the receiver. Then connect the output of the VOA to the input of the receiver using appropriate fiber jumper. 25. If the installed receiver has RSSI signal, a value (needs calibration) of the received power should be displayed now. 26. On Panels list, select TX Setup to calibrate the TX power. Measure the optical power at the output of the VCSEL and enter the value (in mW) in the MEASURED TX POWER box, then select CALIBRATE. The monitored value is adjusted to display the measured value by automatically changing the slope set in the EXTERNAL CALIBRATION window. Reconnect the VOA to the VCSEL and return to the main window. 27. On Panels select RX Calibration. Measure the input power to receiver at the output of the VOA and enter the measured value (in mW) in the MEASURED RX POWER box then select CALIBRATE. The monitored value is adjusted to display the measured value by automatically changing the slope set in the EXTERNAL CALIBRATION window. Reconnect the VOA to the receiver and return to the main window. 28. At this stage, the masked faults should be unmasked and if there is a fault indication try to find the cause for it and fix it to get the transceiver running fault free and try to measure the performance of the laser driver and post amplifier.

25 Ohm TL

50 Ohm TL

Figure 2. Transmitter

50 Ohm TL50 Ohm TL

50 Ohm TL 50 Ohm TL

Figure 3. Receiver

Micrel TXRX_982_R1 Evaluation Board September 2004 M9999-092304 hbwhelp@micrel.com or (408) 955-1690 PCB Layout/Assembly

Micrel TXRX_982_R1 Evaluation Board September 2004 M9999-092304 hbwhelp@micrel.com or (408) 955-1690 Bill of Materials Driver AC-Coupled to the Laser Item Part Number Manufacturer Description Qty. C1–C6, C8, C10, C12–C18, C20–C27, C32, C33, C35–C38, C41, C42 Vishay (1) 0.1µF, 25V, 10% Ceramic Capacitor, Size 0402 C19 Vishay (1) 0.01µF Ceramic Capacitor, Size 0402 1 C28, C34 Vishay (1) 1µF Ceramic Capacitor, Size 0603 2 C29-C31 ECSH0GY106R Vishay (1) 10µF, Y, Tantalium Solid Electrolytic Capacitor, Size 1206 D3-D9 67-1636-1-ND Digi-Key (2) Red, LED 7 J1 745783 AMP (3) Receptacle DB-25 R/A Connector, 25 Position 1 J2-J5 142-0711-821 Johnson Components(4) SMA End Launch Receptacle Connector 4 J6 D12M-9060-A Luxnet (5) ROSA 1 J8 FOL137-xx-Oxx-x4 Fitel (6) FP/DFB Laser, Common Anode 1 L1–L3, L6 BLM18HG102SN Murata (7) Inductor 4 L4, L5, L7, L8 IMC 0805 RK 122 J 01 Vishay (1) 1.2µH Ferrite Bead Inductor, Size 1206 2 Q2 MMBT3904 Fairchild Semiconductor(8) General Purpose NPN Transistor (SOT-23) 2 Q3 MMBT3906 Fairchild Semiconductor(8) General Purpose PNP Transistor (SOT-23) 2 R1, R18, R19, R21, R22, R25, R28, R29, R33, R34, R47, R49 CRCW04021002F Vishay (1) 10k, 5% Resistor, Size 0402 12 R5, R11, R16, R27, R32, R39, R53 CRCW04021002F Vishay (1) 0, 1% Resistor, Size 0402 7 R6, R13 CRCW040275R0F Vishay (1) 75.0, 1% Resistor, Size 0402 2 R7, R9, R10, R20, R30, R37, R38, R50, R51 CRCW04022740F Vishay (1) 274, 5% Resistor, Size 0402 9 R8, R24 CRCW0402230R1F Vishay (1) 30.1, 1% Resistor, Size 0402 2 R14, R15 CRCW040233R2F Vishay (1) 33.2, 1% Resistor, Size 0402 2 R17 CRCW04024752F Vishay (1) 47K, 1% Resistor, Size 0402 2 R45 CRCW04023R32F Vishay (1) 3.32, 1% Resistor, Size 0402 1 R48 CRCW04021501F Vishay (1) 1.5k, 5% Resistor, Size 0402 1 TP3 5010 Keystone (9) Red, Color Coded PCB Test Point 1 TP5 5010 Keystone (9) Black, Color Coded PCB Test Point 1 U1 MIC74 Micrel (10) 2-Wire Serial I/O Expander 1 U2 MIC3001 Micrel (10) Optical Transceiver Management IC 1 U3 SY88973 Micrel (10) 3.2Gbps Limiting Post Amplifier 1 U4 SY88982 Micrel (10) Laser Driver 1 U5 INA138 TI (Burr- Brown)(11) High Side Measurement Current Shunt Monitor U6 74LCX04 Fairchild (8) Low Voltage Hex Inverter with 5V Tolerant Inputs TXRX_982_R1 Micrel (10) Bare PCB 1

Micrel TXRX_982_R1 Evaluation Board September 2004 M9999-092304 hbwhelp@micrel.com or (408) 955-1690 Notes: 1. Vishay: www.vishay.com 2. Digi-Key: www.digikey.com 3. AMP: www.amp.com 4. Johnson Components: www.johnsoncomponents.com 5. Luxnet: www.luxnetcorp.com 6. Honeywell: www.furukawa.com 7. Murata: www.murata.com 8. Fairchild Semiconductor: www.fairchildsemi.com 9. Keystone: www.keystone.com 10. Micrel, Inc.: www.micrel.com 11. TI: www. ti.com

Micrel TXRX_982_R1 Evaluation Board September 2004 M9999-092304 hbwhelp@micrel.com or (408) 955-1690 Micrel Cross Reference To find an equivalent Micrel part, go to Micrel’s website at: http://www.micrel.com and follow the steps below: 1. Click on Dynamic Cross Reference. 2. Enter competitor’s part number in the Dynamic Cross Reference field. 3. To download a PDF version of this information, click on the Cross Reference PDF tab. Application Hints and Notes For application notes on high speed termination on PECL and LVPECL products, clock synthesizer products, SONET jitter measurement, and other High Bandwidth product go to Micrel Semiconductors’ website at http://www.micrel.com/ . Once in Micrel’s website, follow the steps below: 1. Click on “Product Info”. 2. In the Applications Information Box, choose “Application Hints and Application Notes.” HBW Support Hotline: 408-955-1690 Email Support: HBWHelp@micrel.com MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is a ssumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfu nction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a ) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to resul t in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Pu rchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2004 Micrel, Incorporated.