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optical module development platform


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AN-654 APPLICATION NOTE

Optical Module Development Platform 2.5 Gbps Transmitter with Digital Diagnostics
By Luca Vassalli and Mark Malaeb
FEATURES Development Platform for SFF-8472 Digital Diagnostics and Control (ADuC832/ADuC842*) 3.2 Gbps Laser Diode Driver (ADN2847) 1310 nm FP Laser LC TOSA Triple Digitally Controlled Potentiometer (ADN2860) Flexible Control Loop Options Interface Software Dual/Triple I2C? Address Support 64 kB Program Flash, 4 kB Data Flash, 256 Byte EEPROM 3.3 V Single-Supply Operation Schematics and BOM Layout with Gerber Files Available APPLICATIONS OC3–OC48, FC, GBE Optical Transmitters GBIC, SFP and SFF Transmitter Evaluation Digital Diagnostics Development Platform GENERAL DESCRIPTION The SFP Digital Diagnostics Development Board is a platform designed to enable optical module designers to develop SFP and SFF compliant transceivers with digital diagnostics. The same platform can be used to develop the digital diagnostics section for other 2-wire based ID and diagnostics functions, such as the ones found in GBIC, 300 pin MSA, XFP, and other optical MSAs. The development platform includes a development board with an SFP-like layout, an auxiliary SFP cage and connector for final module evaluation, source code to communicate to the I2C interface through an extension board, schematics, bill of material, and layout recommendations. The ADN2847 dual loop laser diode driver (LDD) drives an ac - coupled laser diode assembled in a low cost TOSA can. The ADN2860 digital potentiometer is used to independently control the extinction ratio and average power set points. The ADN2860 also includes EEPROM compliant with the extension to the GBIC serial ID specifications. These two devices allow the development of basic optical GBIC modules. SFP Development Board INCLUDES Schematics and Layout of SFP Development Board Software for ADuC832 Supporting Documents ADN2847 Data Sheet ADN2860 Data Sheet ADuC832/ADuC842 Data Sheet TN012: ADN2847 32L Optical AC Evaluation Board TN017: ADN2841 Burst Mode Application SFP MSA Agreement SFF-8472 Draft Rev x.x DESIGN REVIEW This section describes the basic operation of each IC on the board and discusses optional functions that can be supported. The design is primarily targeted for SFF-8472 implementation. Reference to the digital diagnostics will be consistent with this particular MSA, but its implementation can be applicable to other 2-wire based digital diagnostics implementations. For more information on the specific registers of the MSAs, refer to the published document. The ADuC832/ADuC842 MicroConverters? add a number of functionalities to the system, such as SFF-8472 compliant enhanced digital diagnostics and alternative control loop algorithms, and can be used to support feature-rich modules.

*ADuC842 pin/code compatible future product

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The system as shown in Figure 1 is designed around a MicroConverter that handles both the digital interface and the analog parameters monitoring. Although a set of codes is available with this board, the design is set up to allow the user to develop their own codes and download it into the MicroConverter through either the UART or the emulator port. The design is focused on the transmitter side as most of the diagnostics is performed on or around the laser.
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ADN2860 The ADN2860 is a low tempco 3-channel digital potentiometer (2 ? 512 + 1 ? 128 positions) with 256 bytes of user EEPROM. This device is hardwired to respond to addresses A0h and 58h. Address A0h contains the serial ID information and other static information regarding the module that the vendor specifies (Table I). This is used to support the basic GBIC requirements and the extended SFF-8472 requirements at the first 2-wire address (by default address A2 is handled by the ADuC832). The digital potentiometer controls the extinction ratio, average power set points, and end-of-life thresholds for the laser driver (ADN2847). The potentiometer responds to I2C address 58h and is typically programmed at manufacturing to set the desired laser operating point. The RDAC values can be overwritten to RAM to adjust the laser driver settings, but typically these settings are write protected. By default, to allow the user to experiment, the ADN2860 is NOT write protected, so if these values are overwritten on the RDAC EEPROM, the original data will be lost. The code on the ADuC832 can be modified to enable this protection. Channel 0 controls the laser bias current threshold (failure or end-of-life indication), Channel 1 controls the average output power set point, and Channel 2 controls the extinction ratio set point. For more information on register configuration for the ADN2860, refer to the device’s data sheet. The appendix lists the most useful commands. For information on the SFF-8472 register configuration, refer to the MSA document.

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Figure 1. Block Diagram

Table I. SFF-8472 Digital Diagnostics Memory Map 2-Wire Address1010000X (A0h) 0 SERIAL ID DEFINED BY SFP MSA (96 BYTES) 95 VENDOR SPECIFIC (32 BYTES) 127 0 ALARM AND WARNING THRESHOLDS (56 BYTES) 55 CAL CONSTANTS (40 BYTES) 95 REAL TIME DIAGNOSTIC INTERFACE (24 BYTES) 119 VENDOR SPECIFIC (8 BYTES) 127 USER WRITABLE EEPROM (120 BYTES) 247 VENDOR SPECIFIC (8 BYTES) 255 255 2-Wire Address1010001X (A2h)

RESERVED IN SFP MSA (128 BYTES)

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ADuC832/ADuC842 The MicroConverter is used to perform the monitoring and control of the key parameters in the module. The device includes an 8-channel 12-bit A/D converter, a temperature sensor, two 12-bit voltage output DACs, and an 8052 core that can operate without an external XTAL. Memory space is divided into 62K of flash program space, 4K of flash data space and 2K + 256 bytes of RAM. The MicroConverter responds to the I2C address A2h corresponding to the SFF-8472 digital diagnostics EEPROM space (Table I). The software included with the device enables an external master to read the EEPROM through the I2C interface and retrieve the relevant diagnostics information, module status, and perform software enabled functions such as software shutdown or software monitored LOS. The monitored parameters are: VCCT, VCCR, IBIAS, IMOD, TX power, temperature, and a provision to monitor the RSSI from the receiver side of the module. They can be read through the 2-wire interface at location 96d (60h) to 119d (77h) of the A2h table. The associated alarms and warning thresholds are programmable at location 0 to 55d (37h). The flexible MicroConverter based design permits the implementation of an internally calibrated diagnostics system and does not require calibration constant to be used. The temperature sensor can also be used to perform temperature dependent compensation of the LDD settings or alarms. The design using the ADuC842 enables both I2C addresses to be covered by the MicroConverter and in most cases eliminates the need for the ADN2860. Another advantage of using a MicroConverter based design is the ability to add additional features such as control loop and monitoring functions for APD receivers and cooled or wavelength controlled lasers. The ADuC842 is a single-cycle per instruction core and is ideal for these expanded features. ADN2847 The ADN2847 is a multirate (up to 3.2 Gbps) dual loop laser driver. It is used to directly drive an ac-coupled FP laser. The laser driver controls both the average output power and the extinction ratio over temperature and over the lifetime of the laser. This active control of both extension ratio and output power enables the module designer to cut down the time spent characterizing the laser, as the driver will maintain control of ER over varying slope efficiency of the laser due to either temperature or aging effects. The driver also monitors the bias current and detects failure conditions. The control loop set points are programmed on the ADN2860, while the ADuC832 reads the monitored parameters. The driver can supply up to 100 mA of bias current and 80 mA of modulation current. For more information on the ADN2847 and other parts in this family, refer to the respective data sheets and published technical notes. SOFTWARE Part of the software for the ADuC832 has been developed and is available from the authors upon request. The main functions performed by the MicroConverter are to enable the LDD, monitor the laser parameters, and communicate with an external master through the I2C. The software also includes a routine that allows the display of the requested parameter values on a PC through the RS-232 port. Following are examples of the main routines necessary to perform these tasks. Accessing the ADC and Storing Data into Memory The digital diagnostics portion of the code uses the on-board ADC to measure the module’s supply voltage, its temperature, and the LD bias current (voltage across the monitoring resistor). Output power and modulation current can also be measured but the code has not been added yet. As these values are measured they are saved into data memory space. To avoid too many memory writes, these values are stored/updated only as the request for these values is issued through the I2C. The smallest memory page size is four words. However, the software is able to update one word at a time through a software mask. Accessing the Memory Locations Through the I2C The MicroConverter is configured as a slave on the I2C bus with address A2h, as per the GBIC requirements. Data can be read from a specific address by first performing a write command to that address with no data. Next, when a read is performed, data is read from the previously set address location. The appendix shows the most useful commands to access the I2C interface from the external master.

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SCHEMATICS AND BOM Schematics and BOM are available at the end of this document. Figure 1 shows a block diagram of the SFP TX section, while the schematics (Figures 2, 3, and 4) enable the user to develop the board. A few stuffing options are available for the user to experiment. Here is a summary of these options (Option 1 is preferred): 1. LDD set by digital potentiometer, classic configuration: Uses ADuC832, ADN2847, and ADN2860. ADN2860 controls PSET, ERSET, and ASET through R34, R35, and R36. R54 and R55 are not stuffed. R58 and R59 are not stuffed. Both ADN2860 and ADuC832 handle the I2C communication. 2. LDD set by MicroConverter: Uses ADuC842, ADN2847. ADN2860 not used. ADuC842 controls PSET and ERSET through R34 and R35. R54 and R55 are 0 W . R36 connected to ASET and GND. R58 and R59 are not stuffed. ADuC842 handles both I2C addresses. 3. MicroConverter forces LDD in open loop. MicroConverter handles control loop: Uses ADuC842, ADN2847. ADN2860 not used. ADuC842 controls PAVCAP and ERCAP through R58 and R59. R54 and R55 not stuffed. R34 and R35 0 W to GND, R36 connected to ASET and GND. ADuC842 sets PAV and ER based on reading of IMOD and IBIAS. These two parameters are both monitored and controlled at the same time. The dual loop functionality of the ADN2847 is disabled. ADuC842 handles both I 2 C addresses. QUICK START INSTRUCTIONS A limited number of evaluation systems is available to selected customers. The schematics offered in this application note allow the user to design the board (schematics, layout, and gerber files are available upon request). Once the board is manufactured, follow these instructions: Start with a factory preprogrammed configuration. On a blank board, download the code to the ADuC832/ADuC842. To modify the ADuC8xx code, a software update through the UART or emulator interface is necessary; QuickStart development tools for the MicroConverter are available at www.analog.com/microconverters. The EEPROMs should contain a sample of data according to the SFF-8472 standard; when the MicroConverter is enabled, it performs the digital diagnostics and other monitoring functions. The LDD performs a dual loop control function so that the board can be powered and used without downloading codes every time. Following these instructions will allow the user to transmit optical data in addition to read and write to the I2C accessible registers. Before starting, make sure you have all necessary components and equipments. 1. SFP Digital Diagnostics Development Board 2. 3.3 V regulated power source 3. I2C-to-PC interface board (WIN-I2CNT) available at www.demoboard.com 4. PC with WIN-I2CNT board software installed. Alternatively, other I2C utilities can be used. 5. Differential signal generator (data source) set to 500 mV p-p single-ended or 1 V p-p differential 6. Optical data analyzer (optional) Then proceed with the following steps: 1. Connect the WIN-I2CNT board to the PC 2. Install the I2C support software 3. With the SFP development board set to disable (JP2 and JP8 Pins 3 and 4 connected through jumper or floating), connect the 3.3 V and GND power to the SFP board (JP1) and the WIN-I2CNT board (any of the JP3, JP4, or JP5) 4. Connect the I2C interface of the development board (labeled SDA and SCL on WINI2C and SFP board) 5. Connect the data source to the development board 6. Enable TX (JP2 Pins 2 and 3 connected through jumper) 7. Run the I2 C communication software to read and write into the EEPROM locations. See the appendix for useful commands. The board contains data on I2C addresses A2h, A0h (SFF standard registers), and 58h (ADN2860 digital potentiometer settings). For details about these registers, see the Design Review section.

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APPENDIX Most Useful ADN2860 Commands Extinction Ratio (RDAC2) I2C Address W Data Increase Resistance 2? Decrease Resistance 2? Increase One Step Decrease One Step Save Settings Read DAC Settings Average Power (RDAC1) I2C Address W Data Increase Resistance 2? Decrease Resistance 2? Increase One Step Decrease One Step Save Settings MSB Save Settings LSB Read DAC Settings Read all RDAC Settings 58 58 58 58 58 58 58 58 W W W W W W W W 9A C2 AA D2 92 93 02 00 I2C Address R Data 58 58 58 58 58 58 W W W W W W 9C C4 AC D4 94 04 I2C Address R Data

58

R

7 BITS

58 58

R R

8 LSB +1 MSB RDAC0L RDAC0M RDAC1L RDAC1M RDAC2

End of Life Bias Current Threshold (RDAC0) I2C Address W Data Increase Resistance 2? Decrease Resistance 2? Increase One Step Decrease One Step Save Settings MSB Save Settings LSB Read DAC Settings 58 58 58 58 58 58 58 W W W W W W W 98 C0 A8 D0 90 91 00 I2C Address R Data

58

R

8 LSB +1 MSB

Most Useful Digital Diagnostic Commands I2C Address W Field Read Temperature Read VCC Read TX Bias Read TX Power Read RX Power A2 A2 A2 A2 A2 A2 A2 A2 A2 A2 W W W W W W W W W W 60 61 62 63 64 65 66 67 68 69 I2C Address R A2 A2 A2 A2 A2 A2 A2 A2 A2 A2 R R R R R R R R R R Data MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB

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VCC1 L1 VCC1 VCC1 VCC1 JP2 4 PIN HEADER VCC1 Q1 R4 50? 2N7002 J2 FORCED LAYOUT TX_FAULT TX_DISABLE SDA SCL Q2 PSEN LOS LED D2 R3 10k? C3 0.1?F 1?H POWER INDUCTOR COILCRAFT 0805PS D1 R1 50? C4 22?F VCC1 C1 10?F C2 0.1?F

R2 25?

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VCC

JP1 1 2 3 4 1 2 3 4

4 PIN HEADER LED VCC1 R5 4.7k? JP3 R6 4.7k? R7 4.7k? VCC1 VCC1

3 2 1 JP6 JP4 R22 1k? HEADER 1 2 HEADER3

R9 50?

D3 LED

GND

TX_FAULT TX_DISABLE SDA SCL MOD SEL PSEN LOS 2N7002

MH1 HEADER4 SW1 VCC1 SW-PB R14 10k? RxD TxD RESET RxD TxD RESET

4 3 2 1

VCC1 Q3 D4 R10 50? LED 2N7002 R8 10k?

MOUNTING HOLE MH2

MOUNTING HOLE MH3

VCC1 P1 SMA TxD+ TxD– MOLEX SFP CONNECTOR

MOUNTING HOLE MH4 P2 SMA JP8

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 TxD+ TxD–

Figure 2. Main Board

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VCCT2 1 2 3 4 VCCT2 VCCT2 VCCT2 4 PIN HEADER VCCR2 JP7 C7 22?F 3 2 1 HEADER3 JP9 3 2 1 HEADER3 VCC2 P3 SMA P4 SMA P5 SMA VCCR2 VCCT2 P6 SMA R13 R11 R12 4.7k? 4.7k? 4.7k? R18 25? L2 C5 0.1?F C6 0.1?F C8 22?F

VCCT2 VCCT2 Q4 D5 R16 50? 2N7002 J1 ONBOARD CONNECTOR LED R15 10k?

MOUNTING HOLE

VCC

Q5

R17 50? 2N7002

D6 LED

1?H POWER INDUCTOR COILCRAFT 0805PS R19 25? VCCT2 L3

VCCT2 Q6 D7 R21 50? 2N7002 MOLEX SFP CONNECTOR MAIN BOARD LED R20 10k?

1?H POWER INDUCTOR COILCRAFT 0805PS

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

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VCC4

VCC1

VCC3

VCC2

ERCAP

LBWSET

TXD + DATA IN – DATA IN + U3 CLK – CLK + CCBIAS IMPD FAIL ALS 5 CLKSEL IMMON IBMON ERSET GND GND1 GND3 GND2 GND2 IMPDMON PSET ASET DEGRADE 32 IMODP 28 31 13 16

TXD + GND2

C15 0.1?F IMODN 27 12 C22 0.1?F

TXD –

TXD –

PAVCAP

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L11 TOKO FSLB2520-220K C12 0.1?F C13 0.1?F TOKO FSLB2520-220K VCC1 L12 VCCLASER C19 0.01?F PIN 4 OF TO CAN ON THE BOTTOM SIDE OF PCB C18 0.01?F C20 0.01?F MURATA BLM18AG601SN1 R40 50? R32 82? L13 C23 10nF R33 PIN 2 TO CAN 18? TOP SIDE PIN 3 TO CAN TOP SIDE OF PCB C21 0.01?F R31 25? 1 10 8 26 11 9 21 25 LS1 DIODE_LASER L14

VCC1

VCC1

C11 0.1?F

ERCAP

ERCAP

PAVCAP

PAVCAP

C14 1?F

C17 1?F

LBWSET

LBWSET

C16 0.1?F

ADN2847
BIAS

15 17

Figure 3. High Speed Section
7 14 22 29 30 24 23 6 4 3 18 19 20 2 R34 R35 R36 1.0k? 1.0k? 1.0k? ALS TX_FAULT DEGRADE ASET ERSET PSET IMPDMON IMMON IBMON IMPDMON IMMON IBMON R38 1k? R39 1k? ASET ERSET PSET R37 1k?

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GND

MURATA BLM18AG601SN1

AGND

ALS TX_FAULT DEGRADE

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24 23 22 21 20 19 NC NC NC NC VDD A0 WO B0 W2 A1 W1 8 7 VCC1 EA P2.7/PWM1/A15/A23 P2.6/PWM0/A14/A22 P2.5/A13/A21 U2 P2.4/A12/A20 DGND DGND 37 36 35 34 33 32 31 P2.0/A8/A16 SDATA P3.6/WR P3.7/RD SCLK 30 29 SDA SCL SDA SCL C54 CAP DVDD EXTAL2 EXTAL1 P2.3/A11/A19 P2.2/A10/A18 P2.1/A9/A17 38 VCC1 39 40 ERSET 41 ASET ERSET 42 43 9 10 11 12 B2 B1 A0EE RE WP SCL SDA DGND U1 A1EE 1 2 VCC1 4 PSEN 6 VSS A2 5 3 A0R A1R 18 17 16 15 14 13 ASET VCC1

VCC1

AGND

R51 100k?

ADN2860

GND

R52 100k? 56 55 54 53 52 51 50 49 48 47 46 45 44 DVDD ALE DGND P0.7/AD7 P0.6/AD6 P0.5/AD5 P0.3/AD3 P0.2/AD2 P0.1/AD1 P1.0/ADC0/T2 P0.4/AD4 P0.0/AD0 PSEN

IMPDMON 2 3 4 5 6 7 C52 0.1?F 8 9 C53 10 11 12 13 RSSIOMA P1.4/ADC4 14 P1.5/ADC5/SS DGND P1.7/ADC7 P3.0/RxD RESET P1.6/ADC6 P3.1/RxT P3.2/INT0 DVDD P3.4/T1/CONVST DAC1 DAC0 VREF CREF AGND 0.1?F AGND AGND AVDD AVDD P1.3/ADC3 P1.2/ADC2 P1.1/ADC1/T2EX

IMPDMON

1

IMMON

IMMON

IBMON

IBMON

VCC1

C51 0.1?F

ADuC832

ERCAP

ERCAP RSSIOMA

R58 1k?

R56 100k?

15 16 17 18 19 20 21 22 23 24 25 26 27 28 LBWSET ALS VCC1 LOS RESET RxD TxD TxD RxD RESET TX_DISABLE TX_FAULT DEGRADE LOS TX_DISABLE TX_FAULT ALS DEGRADE LBWSET

PAVCAP

PAVCAP

R59 1k?

R57 100k?

P3.3/INT1/MISQPWM1

P3.5/T0/PMWC/PWM0/EXTCLK

Figure 4. Control and Diagnostics

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PSET

R54 PSET 1k?

ERSET

ERSET

R55 1k?

VCC LASER

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Table II. Bill of Materials Item 1 2 3 4 5 Qty. 1 4 3 4 8 Reference C1 C2, C3, C5, C6 C4, C7, C8 C18, C19, C20, C21 C11, C13, C15, C16, C22, C51, C52, C53 C12, C14, C17 D1, D2, D3, D4, D5, D6, D7 J1 J2 JP6 JP3, JP7, JP9 JP1, JP2, JP4, JP8 L1, L2, L3 L11, L12 L13, L14 LS1 Description CAP TANT CASE-B 10 m F 6.3 V 10% CAP 0603 CERM 0.1 m F Z5U 16 V +80/–20% CAP TANT CASE-B 22 m F 6.3 V 10% Manufacturer KEMET KEMET KEMET Mfgr P/N T491B106K006AST C0603C104Z4VACTU T491B226K006AS ECJ-ZEB0J103K 0402F104Z160BT Stuffing

CAP 0201 CERM 0.01 m F X5R Panasonic 6.3 V 10% BC CAP 0402 CERM 0.1 m F Components Y5V 16 V +80/–20% CAP 0603 CERM 1 m F 6.3 V X5R 10% LED T.H. CONN SMT SFP Connector IDC20 Forced Layout SFP Electrical Connector1 CONN T.H. HEADER 2 ? 1 Male 0.1” SP STR CONN T.H. HEADER 3 ? 1 Male 0.1” SP STR CONN T.H. HEADER 4 ? 1 Male 0.1” SP STR IND 1608 1 m H Power Inductor IND 1210 IND 0603 EMIFIL for DC 600 W Laserdiode T.H. 3 PINS Panasonic Lite-On Electronics Molex

6 7 8 9 10 11 12 13 14 15 16

3 7 1 1 1 3 4 3 2 2 1

ECJ-1VB0J105K S270CKT 74441-0010 Onboard

Sullins Electronics Sullins Electronics Sullins Electronics Coilcraft TOKO Murata INFOMAX Sumitomo Excelight Lighthorse Fairchild Panasonic Panasonic Panasonic

PZC36DAAN PZC36DAAN PZC36DAAN DS1608C-102 FSLB2520-220K BLM18AG601SN1 LD1310-134- 4-2-C0110 SLT2276-LN SLT2276-LN SASF55ZGT-6 2N7002 ERJ-1GEJ103C ERJ-1GEJ152C ERJ-2GEJ180X

17 18 19 20 21

6 6 3 3 1

P1, P2, P3, P4, P5, P6 Q1, Q2, Q3, Q4, Q5, Q6 R37, R38, R39 R34, R35, R36 R33

CONN T.H. SMA BNC Connector 5 PINS MOSFET SOT-23 N-CH 60 V 7.5 W RES 0201 1 k W 1/20W 5% RES 0201 1 k W 1/20W 5% RES 0402 18 W 1/16W 5%

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Table II. Bill of Materials (continued) Item 22 23 24 25 Qty. 1 4 4 7 Reference R32 Description RES 0603 82 W 1/16W 5% Manufacturer Yageo America Yageo America Panasonic Panasonic Mfgr P/N 9C06031A82ROJLHFT 9C06031A25R5FKHFT ERJ-1GEJ104C ERJ-3GEYJ560V Stuffing

R2, R18, R19, R31 RES 0603 25.5 W 1/16W 1% R51, R52, R56, R57 R1, R4, R9, R10, R16, R17, R21 R3, R8, R14 R15, R20 R5, R6, R7, R11, R12, R13 R22 SW1 U1 RES 0201 100 k W 1/20W 5% RES 0603 56 W 1/16W 5%

26 27 28 29 30

5 6 1 1 1

RES 0603 10 k W 1/16W 1% RES 0603 4.7 k W 1/16W 5% RES 0603 1.1 k W 1/16W 5% SWITCH TACT 6 ? 3.5 MM H = 4.3 MM 130GF IC SMT LFCSP24 NV Triple Digital Potentiometer with EEPROM I2C IC SMT LFCSP56 MicroConverter with 62 kB MCU IC SMT LFCSP32 2.5 G Dual Loop Laser Driver 32 kHz Watch Crystal CAP 0201 10 nF RES 0201 50 W RES 0201 1 k W

Panasonic Yageo America Yageo America E-Switch ADI

ERA-3YEB103V 9C06031A4701JLHFT 9C06031A1101JLHFT TL1107AF130W ADN2860

31 32 33 34 35 36

1 1 1 1 1 4

U2 U3 C54 C23 R40 R54, R55, R58, R59

ADI ADI

ADUC832 ADN2847 NI NI NI NI

ECJ-ZEB0J103K

NI = Not Installed

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Purchase of licensed I2C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips. ? 2003 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective companies.

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E03716–0–7/03(0)


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