LDTC2_2 WAVELENGTH | Alldatasheet

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Technical content

ORDERING INFORMATION

LDTC 2/2E Enclosed 2.2 A LD/TEC Controller LDTC 2/2O Open Frame 2.2 A LD/TEC Controller WEV-300* Thermal Washer & Heatsink WEV-301* Thermal Washer, Heatsink, 5 V Fan WEV-302* Thermal Washer, Heatsink, 12 V Fan POWER & STABILITY Combine the drive power of the WLD33ND laser driver (up to 2.2 A) with the temperature stability of the WTC32ND temperature controller (±2.2 A available) on one small board. Available as an open frame or in a chassis mount enclosure.

APPLICATIONS

Ideal for integrated laser driver or LED packages that include temperature control, often utilized in medical diagnostic equipment, remote sensing, analytical instrumentation, military, and communications applications. POWER YOUR APPLICATION WITH THE RIGHT FEATURES The WTC32ND will control temperature using thermistors, RTDs, or linear temperature sensors such as the LM335 or the AD590. Adjust temperature using the onboard trimpot or a remote voltage input from a panel mount potentiometer, DAC, or other voltage source. A default temperature setpoint configuration provides fault tolerance and avoids accidental damage to system components. Adjustable trimpots configure heat and cool current limits. The WLD33ND Laser Driver maintains precision laser diode curent (Constant Current Mode) or stable photodiode current (Constant Power mode) using electronics compatible with A/B Type lasers. FEATURES AND BENEFITS

  • ±2.2 A of TEC and 2.2 A of LD current (up to 3 A with product variation)
  • Small package size
  • Single supply operation LD: +5 to +12 V
  • Single supply operation TC: +5 to +28 V
  • Slow start laser diode protection
  • Constant Current or Constant Power modes
  • Adjustable laser diode current limit
  • Remote TTL Shutdown/Interlock
  • Ultra-stable PI control loop
  • Separate heat & cool current limits
  • Failsafe Setpoint default for D/A remote temperature setting PAGE e Applies to Product Revisions A – C © April 2022 A Laser Type B Laser Type LM335AD590 RTDRT Pb RoHS Compliant

CONTENTS

ELECTRICAL SPECIFICATIONS 7 SAFETY INFORMATION & THERMAL DESIGN CONSIDERATIONS 9 OPERATING INSTRUCTIONS – TEMPERATURE CONTROLLER 10 LASER DRIVER 12 ADDITIONAL TECHNICAL INFORMATION 15 TROUBLESHOOTING – TEMPERATURE CONTROLLER 20 LASER DRIVER 21 MECHANICAL SPECIFICATIONS 23 CERTIFICATION AND WARRANTY 26 * Only for 2/2O 406-587-4910 www.teamWavelength.com LDTC2/2E & LDTC2/2O Laser Diode & Temperature Controllers DATASHEET AND OPERATING GUIDE

0 V = OPEN = ENABLE

sufficient compliance for laser diode and thermoelectric loads. Separate VS if higher compliance is required. Figure 1. Wiring Diagram for LDTC2/2. Figure 2. The LDTC2/2 is compatible with Type A and Type B lasers, but will not drive Type C lasers.

Table 1. Pin Descriptions and Wire Colors TEC Drive White Connect +5 to +28 V between Pins 2 & 3 to drive the TEC output stage. Reference the Safe Operating Area Calculator. 3 (GND) Power Supply Ground Black Connect power supply ground to this pin. 1 (COM) Common Tan Low current GND for monitors, DACs, External VSET, etc. 2 (PD MON) PD Monitor in CC mode Pink Photodiode Monitor in Constant Current mode. 4 (COM) Common Violet Low current GND for monitors, DACs, External VSET, etc. Setpoint/Modulation Input Yellow Voltage Input range is 0 to 2 V. Transfer function is given in Table 2. 6 (COM) Common Orange Low current GND for monitors, DACs, External VSET, etc. Table 2 for the transfer function. transfer function to temperature is determined by the sensor chosen. 12 (COM) Common Black Low current GND for monitors, DACs, External VSET, etc. 1 (LDC) Laser Diode Cathode Black Laser diode cathode connection. 2 (PDA) Photodiode Anode White Photodiode anode connection. 3 (PDC) Photodiode Cathode Blue Photodiode cathode connection. 4 (LDA) Laser Diode Anode Red Laser diode anode connection. 5 (COM) Common Green Low current GND for monitors, DACs, External VSET, etc. 6 (TEC+) TEC+ Connection Red/Black Cooling current flows from this pin when using an NTC sensor. 7 (TEC-) TEC- Connection Orange Heating current flows from this pin when using an NTC sensor. table for input voltage range and damage thresholds. 10 (COM) Common Green/Black Low current GND for monitors, DACs, External VSET, etc. [1] See page 14 for additional information regarding the use of RTDs, AD590, and LM335 sensors with the LDTC2/2.

Table 2. Monitor & Setpoint Transfer Functions Connector J2) to forward current through Laser Diode. NOTE: Available on Rev. B and later. Actual Temperature 1 V / V Monitors the actual temperature. Converts Setpoint Voltage to Laser Diode current. Temperature Setpoint 1 V / V Monitors the temperature setpoint. [2] RPD is set with the onboard PDset jumper. See page 11 for details on configuring this jumper. PCB. Revision is the third character. Example: 00B1730002 would be Revision B of the LDTC2/2.

© 2022 www.teamWavelength.com 6 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER ELECTRICAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS SYMBOL LDTC2/2E LDTC2/2O UNIT NOTE LD Supply Voltage & Control Electronics VDD +4.75 to +12 VDC TC Load Supply Voltage VS +4.5 to +28 VDC Max LD Output Current ILD 2.2 A Max TC Output Current IOUT ±2.2 A Laser Driver Internal Power Dissipation PMAX 9 W TAMBIENT = 25ºC Temperature Controller Internal Power Dissipation PMAX 9 W TAMBIENT = 25ºC (with fan and heat sink) Case Operating Temperature [1] TOPR -40 to 85 ºC Case Storage Temperature TSTG -65 to 150 ºC Weight 6.5 2.4 oz 184.3 g (LDTC2/2E) 68.0 g (LDTC2/2O) LASER DRIVER SPECIFICATIONS MIN TYP MAX UNIT NOTE CONSTANT CURRENT CONTROL Short Term Stability, 1 hour 200 ppm TAMBIENT = 25ºC CONSTANT POWER CONTROL Short Term Stability, 1 hour 0.01 % TAMBIENT = 25ºC Long Term Stability, 24 hours 0.05 % TAMBIENT = 25ºC OUTPUT Peak Current, IMAX 1.8 2.0 2.2 A With heat sink and fan. Compliance Voltage, Laser Diode Load 3.0 V Full Temp. Range, ILD=2.0A, 5V Rise Time 460 nsec ILD = 2 A Fall Time 320 nsec ILD = 2 A Bandwidth, Constant Current 1.6 MHz Sinewave input signal Bandwidth, Constant Power Depends on Photodiode Bandwidth Delayed Start 0.25 sec Slow Start Ramp 0.01 sec POWER SUPPLY Voltage, VDD 5 12 V Quiescent Current, VDD 5 10 15 mA MODULATION INPUT VSET Input Voltage Range 0 2 V VSET Damage Threshold < -0.5 > 5.4 V VSET Input Impedance 20 kΩ [1] In the WLD33ND, an internal thermostat has been added to activate Shutdown (SHD) when the internal temperature exteeds 105°C. The output will be re-enabled after a 250 to 300 msec slow-start once the internal temperature drops below 95°C. [2] LDTC 2/2 E Revisions A & B have heights of 1.14 inches [29.0mm] [2] LDTC 2/2 O Revisions A & B have heights of 1 inch [25.4mm] CAUTION: Operation higher than 5 V on V DD (i.e. 12 V) requires close evaluation of the SOA curves and current limit settings. Damage to the WLD or WTC will occur if they are operated outside their Safe Operating Area. Contact the factory if you plan to use higher than 5 V.

© 2022 www.teamWavelength.com 7 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER ELECTRICAL SPECIFICATIONS (CONTINUED) TEMPERATURE CONTROLLER SPECIFICATIONS MIN TYP MAX UNIT NOTE TEMPERATURE CONTROL Short Term Stability, 1 hour [3] 0.0009 °C OFF ambient, 10 kΩ thermistor @ 25°C Short Term Stability, 1 hour [3] 0.002 °C ON ambient, 10 kΩ thermistor @ 25°C Long Term Stability, 24 hours [3] 0.002 °C OFF ambient, 10 kΩ thermistor @ 25°C Control Loop P PI P (Proportional Gain) 18 20 22 A / V I (Integrator Time Constant) 2 3 4 sec Setpoint vs. Actual Temperature Accuracy <0.2% TSET = 25°C using a 10kΩ thermistor (Rev. B) OUTPUT Peak Current ±1.8 ±2.0 ±2.2 A Compliance Voltage [4], Full Temperature Range |VS - 0.1| V TEC, IOUT = 100 mA |VS - 0.3| V TEC, IOUT = 1.0 A |VS - 0.3| V TEC, IOUT = 1.5 A |VS - 0.6| V TEC, IOUT = 2.0 A |VS - 0.6| V Resistive Heater, IOUT = 2.2 A POWER SUPPLY Voltage, VDD 4.75 12 V Quiescent Current, VDD 55 105 mA Voltage, VS 4.5 28 V Quiescent Current, VS 20 50 100 mA TEMPERATURE SENSORS Sensor Compatibility Thermistor, RTD, IC Sensors Sensor Input Voltage Range [5] GND to VDD - 2.0 V Sensor Input Damage Threshold < -0.7 > VDD+7 V VSET Input Impedance 500 kΩ VSET Damage Threshold < -0.7 > VDD+7 V BIAS CURRENT Bias Current Accuracy 1 % Include bias current resister tolerance THERMAL Heatspreader Temperature Rise [6] 28 30 33 °C / W No heatsink, thermal washer, or fan Heatspreader Temperature Rise [6] 18 21.5 25 °C / W With WHS302 Heatsink and WTW002 Thermal Washer, no fan Heatspreader Temperature Rise [6] 3.1 3.4 3.9 °C / W With WHS302 Heatsink, WTW002 Thermal Washer, and 3.5 CFM fan [3] When using resistive heaters, stability can only be consistently achieved when specified temperatures are 10°C or more above ambient. [4] Compliance voltage available between Pins 6 & 7 (TEC+ & TEC-) on J3. [5] The bias source has a compliance up to VDD - 2 V. In normal operation this limits the sensor voltage range from 0 V to VDD - 2 V. While voltages up to ±5 V outside this range on the VSET pin will not damage the unit, it will not provide proper control under these conditions. [6] TAMBIENT = 25°C. Applies to LDTC2/2O only. Valid for both laser driver and temperature controller (WLD & WTC).

© 2022 www.teamWavelength.com 8 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER THEORY OF OPERATION The LDTC2/2 Laser Diode Driver and Temperature Controller combines the drive power of the WLD33ND with the temperature stability of the WTC32ND. The LDTC2/2E is enclosed with a cover and base, while the LDTC2/2O is open frame without cover or base. Accessory heatsinking is required for LDTC2/2O. Both have the same functionality. LASER DIODE DRIVER CURRENT SOURCE It may be useful to remember that you do not directly set the laser drive current setpoint; instead, you adjust a voltage signal that represents the output current. The setpoint voltage is controlled by the onboard trimpot or by an external input. As current is driven through the load, there is a voltage drop across the load because of the impedance. As the current increases, the voltage drop may increase to the point that it reaches the Compliance Voltage limit of the current source. Once that occurs, the current source is no longer able to increase the current driven to the load, even if you increase the setpoint. TEMPERATURE CONTROLLER The WTC32ND delivers bidirectional current to a Peltier Effect thermoelectric cooler, or unidirectional current to a resistive heater. The controller adjusts the output current in order to change the temperature of the sensor that is connected to the thermal load. The goal is to make the voltage across the sensor match the setpoint voltage, and then keep them equal in spite of changes to ambient conditions and variations in thermal load.

FEATURES

The LDTC2/2 integrated laser driver and temperature controller includes features that help protect your laser and make the driver more versatile in a wide array of applications:

  • The current limits (laser, heating, cooling) are set by onboard trimpots and protect the laser from over-current and over-/under-temperature conditions.
  • Slow-start delays the laser current ramp by 250 msec, and then ramps the current to the setpoint.
  • Constant Power operation is available, where the driver adjusts the laser forward current in order to maintain a constant photodiode current.
  • Available remote LD & TC setpoint control.
  • Separate heating and cooling current limits. SAFETY INFORMATION & THERMAL DESIGN CONSIDERATIONS SAFE OPERATING AREA — DO NOT EXCEED INTERNAL POWER DISSIPATION LIMITS Before attempting to operate the LDTC, it is imperative that you first determine that the laser driver and temperature controller will operate within the Safe Operating Area (SOA). Operating the unit outside of the SOA may damage the controller or the load, and will void the warranty. Go to the Wavelength Electronics website for the most accurate, up-to-date, and easy to use SOA calculators: Laser Diode Drivers: www.teamwavelength.com/support/design-tools/soa-ld-calculator/ Temperature Controllers: www.teamwavelength.com/support/design-tools/soa-tc-calculator/ SOA charts are included in this datasheet for quick reference (page 18), but we recommend you use the online tools instead. To ensure safe operation of the LDTC controller, it is imperative that you determine if the unit is going to be operating within the internal heat dissipation Safe Operating Area (SOA). For more information on Safe Operating Area, see our Operating Area. When you assemble and mount the TEC (or heater), heatsink, and temperature sensor, make sure the physical connections between the components are solid. We recommend using thermal paste or thermal washers at the load/TEC and TEC / heatsink interfaces. The thermistor must be in firm contact with the load in order to achieve stable and reliable temperature control. PREVENT DAMAGE FROM ELECTROSTATIC DISCHARGE Before proceeding, it is critical that you take precautions to prevent electrostatic discharge (ESD) damage to the driver and your laser. ESD damage can result from improper handling of sensitive electronics, and is easily preventable with simple precautions. For more information regarding ESD, see our Application Note AN-LDTC06: Electrostatic Discharge Basics. We recommend that you always observe ESD precautions when handling the LDTC controller and loads.

Operate the LDTC2/2 with all loads attached. damage to an expensive laser diode. include RTDs, the LM335, and the AD590. Table 3. Trimpot Function vs. Sensor & Load Type to your thermoelectric or resistive heater. Table 4. Wiring vs. Sensor & Load Type different sensor, please contact Wavelength for details. the tec or heater, potentially damaging it. Alternate Temperature Sensors” on page 14.

Operate the LDTC2/2 with all loads attached. damage to an expensive laser diode. A sliding switch selects operating mode. that is directly proportional to Laser Diode ISET. Current mode, or the CP position for Constant Power Mode. this jumper only when power is not applied to VDD. Figure 8. Select the photodiode range with the PDset If you would prefer a different range, contact Wavelength. before applying power to the LDTC2/2. voltage for the WLD33ND Laser Driver. WLD and WTC will not require more than 6.0 A. supplies in a range of output voltage and current capacities.

(R14 & R15). See Figure 12 for their location. appropriate RSENSE resistance. Table 5. Laser Diode Current Sense Resistor RSENSE vs. Equation 7. Calculating RSENSE for Constant Power Mode. Equation 8. Calculating RSENSE for Constant Current Mode.

  • Never use a carbon film resistor for RSENSE.
  • Avoid resistors with high parasitic inductance.
  • Select a resistor with a low temperature coefficient (1%, <100 ppm/°C).
  • Use Equation 9 for determining the power rating of RSENSE. Equation 9. Calculating the Power Rating for RSENSE. RATING = 1.25 · (ILDMAX)2 · RSENSE 1R SENSE = R14 + R15 R14 R15

Figure 12. Location of RSENSE

Figure 13. Block Diagram for WLD33ND Connections

Figure 14. Block Diagram for WTC32ND Connections

© 2022 www.teamWavelength.com 19 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER TROUBLESHOOTING – TEMPERATURE CONTROLLER PROBLEM POTENTIAL CAUSES SOLUTIONS Temperature is decreasing when it should be increasing. –OR– Temperature is increasing when it should be decreasing. The TEC may be connected backwards to the LDTC. The convention is that the red wire on the TEC module connects to TEC+ (pin 6) and the black wire to TEC- (pin 5). If your TEC is connected in this manner and the problem persists, the TEC module itself may be wired in reverse. Switch off power to the system, reverse the connections to the LDTC, and then try again to operate the system. TEC wiring polarity is dependent on temperature sensor type (NTC vs. PTC). Verify that the polarity is correct for the sensor type you are using (Table 4). Temperature increases beyond the setpoint and will not come down. The heatsink may be inadequately sized to dissipate the heat from the load and TEC module, and now the system is in a condition called thermal runaway. Increase the size of the heatsink, add a fan to blow air over the heatsink, and/or reduce the ambient air temperature around the heatsink. Apply a thin layer of thermal paste or use thermal washers between the load, the TEC surfaces, and the heatsink. The TEC is not adequately sized for the thermal load. The heat being generated by the load may be too great for the TEC to pump to the heatsink; a larger TEC may be needed. Consult our technical note TN-TC01: Optimizing Thermoelectric Temperature Control Systems at www.teamwavelength.com/download/applicationtechnotes/tn-tc01.pdf The temperature of my heater- based system increases without stopping. The current limits might not be correctly configured. When using a heater the current limit trimpots LIM A and LIM B must be set according to the temperature sensor type you are using. If the load temperature increases past the setpoint and continues to increase, one of the current limit trimpots may have been improperly set. Refer to Table 3 and “Configuring heating and cooling current limits” on page 9 for more information. Temperature does not stabilize very well at the setpoint. Poor thermal contact between components of the thermal load. Use thermal paste or washers between the load/TEC and TEC/heatsink interfaces. Make sure the temperature sensor is in good thermal contact with the load. Operating outside of the ideal region of the temperature sensor. The sensor type and bias current should be selected to maximize sensitivity at the target temperature. Thermistors provide the best performance, particularly for applications where a single setpoint temperature must be accurately maintained. For example, at 25°C a 10 kΩ thermistor has a sensitivity of 43 mV/°C, whereas an RTD sensor has a sensitivity of 4 mV/°C. Proportional control term is set too high. Reduce the value of the proportional term. For more information, contact the factory. Temperature does not reach the setpoint. Insufficient current driven to the TEC or Heater. Increase the current limit - but DO NOT exceed the specifications of the TEC or heater. The controller does not have sufficient compliance voltage to drive the TEC or heater. Increase the power supply voltage; be certain to verify that the controller is within the Safe Operating Area; the SOA calculator is found at: www.teamwavelength.com/support/design-tools/soa-tc-calculator/ LDTC does not respond to external temperature setpoint input. The EXT T SET signal is below the minimum signal value of 0.3 V. If the R TC SET signal falls below 0.3 V, the LDTC defaults to a “safe temperature” setpoint voltage of 1 V (for a 10 kΩ thermistor at 100 µA bias current, the default temperature setpoint is 25°C). The safe temperature setpoint voltage can be changed at the factory if your application requires it. To reset the safety circuit, the R TC SET signal must be greater than 0.4 V. Temperature is slow to stabilize and is not within the specifications. Setpoint temperature is set close to the ambient temperature. Set the temperature at least 10°C above ambient when using a resistive heater. A resistive heater is unable to precisely maintain temperature near ambient because once the temperature overshoots the setpoint, the controller turns off and relies on ambient temperature to cool the load. If setting the temperature 10°C or more above ambient is not possible, then choose a thermoelectric cooler, which can alternately heat and cool the load to maintain a more precise setpoint temperature. Setpoint is 1 V even when the Tset trimpot is fully OFF. Failsafe circuit has been activated due to low setpoint. Increase the temperature setpoint to a value above 0.3 V. Once the Tset value becomes greater than 0.3 V, the failsafe circuit will be disabled and the setpoint will be at the set value.

© 2022 www.teamWavelength.com 20 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER TROUBLESHOOTING – LASER DRIVER PROBLEM POTENTIAL CAUSES SOLUTIONS Driver will not switch on. Improperly configured power supply. Carefully check the wiring diagram on page 2. Make sure the power supply polarity is not reversed. Output will not enable. Improperly configured enable switch on the LDTC. If the LDTC is configured to use the LD SHD remote enable input, the onboard LD Enable toggle switch must be set to ON (enable). Make sure this switch is properly set. Remote Enable signal is not correct. To enable the laser output, float or provide a zero Volt signal to LD SHD. Input a 3 to 5 V signal to disable the output. Laser output power too low in Constant Current mode. Laser current setpoint too low. Increase the setpoint either by adjusting the I SET trimpot counter- clockwise, or by increasing the signal voltage on the R LD SET input (Pin 5 on Connector J2). Laser current limit too low. Refer to page 12 for instructions on setting the laser driver current limit. Laser driver is compliance limited. Check the laser diode specifications to determine the forward voltage (VF). Make sure that the LDTC2/2 is not compliance limited. Refer to the Electrical Specifications table on page 6. If the driver is compliance limited, VDD may need to be increased. Verify that the LDTC2/2 will be operating within the Safe Operating Area if VDD is increased. Laser does not reach desired output in Constant Power mode. Laser current limit too low. Check the laser diode datasheet to determine the approximate laser drive current at the desired optical power output level. Then verify that the current limit is set slightly higher than that. Refer to page 12 for instructions on setting the laser driver current limit. Do not exceed the maximum current for the laser diode. Photodiode feedback current is out of range for the LDTC. Refer to the laser diode datasheet to determine the approximate photodiode (PD) current at the desired output power level. If the PD current exceeds the LDTC PD current range, the LDTC will require modification. Contact the Wavelength Electronics Sales department for assistance.

© 2022 www.teamWavelength.com 21 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER CABLING SPECIFICATIONS POWER CABLE – WCB300 (INCLUDED WITH LDTC2/2) – CONNECTS TO J1 WCB-300 LDTC2/2 SERIES POWER CABLE RED WHT BLK MOLEX PART #10-11-2033 TERMINAL HOUSING MOLEX #08-50-0005 0.100" CRIMP TERMINAL PIN NAME VDD VS GND

4 CONDUCTOR 22AWG FOIL SHIELD CABLE

36.0" LENGTH WIRE COLOR RED WHITE BLACK

DESCRIPTION

OUTPUT CABLE TO TEC & LD – WCB301 (INCLUDED WITH LDTC2/2) – CONNECTS TO J3

10 CONDUCTOR 22AWG FOIL SHIELD CABLE

36.0" LENGTH MOLEX #08-50-0005 0.100" CRIMP TERMINAL MOLEX PART #10-11-2103 TERMINAL HOUSING BLK WHT BLU RED GRN RED/BLK ORG WHT/BLK ORG/BLK GRN/BLK PIN NAME LDC PDA PDC LDA COM TEC+ TEC- SEN+ SEN- COM WIRE COLOR BLACK WHITE BLUE RED GREEN RED / BLACK ORANGE WHITE / BLACK ORANGE / BLACK GREEN / BLACK SENSOR POSITIVE CONNECTION SENSOR NEGATIVE CONNECTION LOW CURRENT GROUND I/O CABLE – WCB309 (INCLUDED WITH LDTC2/2) – CONNECTS TO J2

12 CONDUCTOR 22AWG CABLE

36.0" LENGTH MOLEX # 08-50-0005 0.100" CRIMP TERMINAL MOLEX PART # 10-11-2123 TERMINAL HOUSING TAN PINK GREY VIOLET YELLOW ORANGE BLUE BROWN GREEN RED WHITE BLACK PIN WIRE COLOR BLACK WHITE RED GREEN BROWN BLUE ORANGE YELLOW VIOLET GREY PINK TAN NAME COM R TCSET SET T M ACT T M LD I M LD P M COM R LDSET COM LD SHD PD MON COM REMOTE TEMPERATURE SETPOINT SETPOINT TEMPERATURE MONITOR ACTUAL TEMPERATURE MONITOR LASER DIODE CURRENT MONITOR PHOTODIODE MONITOR LOW CURRENT GROUND REMOTE LASER DIODE SETPOINT LOW CURRENT GROUND LASER DIODE SHUTDOWN PHOTODIODE MONITOR IN CC MODE LOW CURRENT GROUND NOTE: LDTC2/2E & LDTC2/2O Rev. A DO NOT HAVE PINS 1 & 2 of WCB309. These were labeled as spares for Rev. A.

© 2022 www.teamWavelength.com 22 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER MECHANICAL SPECIFICATIONS DIMENSIONS – LDTC2/2E (WITH ENCLOSURE) 2.70" [68.6 mm] 0.15" [3.8 mm] 2.40" [61.0 mm] 4.80" [121.9 mm] 4.20" [106.7 mm] 0.15" [3.8 mm] 4.50" [114.3 mm] Ø0.13" [Ø3.2 mm]

4 PLACES

0.30" [7.6 mm] 1.28" [32.5 mm] .500 1.27.875 2.22 .125 0.32 3.700 9.40 .550 1.40 4.800 12.19 2.400 6.10 2.200 5.59 .250 0.64 2.700 6.86 1.350 3.43 All tolerances ±5%; units in inches [mm].

© 2022 www.teamWavelength.com 23 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER MECHANICAL SPECIFICATIONS DIMENSIONS – LDTC2/2O (OPEN FRAME) 0.350 [8.9] 0.575 [14.6] 0.512 [13.0] 2.200 [55.9] 0.15 [3.81] 2.50 [63.5] 3.700 [94.0] 0.15 [3.81] 4.00 [101.6] .156 THROUGH

4 PLS

0.750 2.000 3.700 4.000 0.150 2.200 2.500 0.150 6-32 UNC-2A X 1/4" SCREW Wavelength Electronics circuit board Customer mounting surface Use the longer standoff when mounting unit with a fan. Use the smaller standoff for mounting directly to instrument. All tolerances ±5%; units in inches [mm].

© 2022 www.teamWavelength.com 24 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER MECHANICAL SPECIFICATIONS DIMENSIONS – HEATSINK FOOTPRINT 0.78" 0.68" [17.2 mm] 0.945" [24.0 mm] 2.40" [60.9 mm] 0.945" [24.0 mm] 1.25" [31.7 mm] Ø0.156" [Ø4.0 mm] 4-40 tapped holes in device 0.15" [3.8 mm] 2.20" [55.9 mm] 0.15" [3.8 mm] 3.70" [94.0 mm] All tolerances ±5%; units in inches [mm].

© 2022 www.teamWavelength.com 25 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER CERTIFICATION AND WARRANTY CERTIFICATION Wavelength Electronics, Inc. (Wavelength) certifies that this product met its published specifications at the time of shipment. Wavelength further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by that organization’s calibration facilities, and to the calibration facilities of other International Standards Organization members. WARRANTY This Wavelength product is warranted against defects in materials and workmanship for a period of one (1) year from date of shipment. During the warranty period, Wavelength will, at its option, either repair or replace products which prove to be defective. WARRANTY SERVICE For warranty service or repair, this product must be returned to the factory. An RMA is required for products returned to Wavelength for warranty service. The Buyer shall prepay shipping charges to Wavelength and Wavelength shall pay shipping charges to return the product to the Buyer upon determination of defective materials or workmanship. However, the Buyer shall pay all shipping charges, duties, and taxes for products returned to Wavelength from another country. LIMITATIONS OF WARRANTY The warranty shall not apply to defects resulting from improper use or misuse of the product or operation outside published specifications. No other warranty is expressed or implied. Wavelength specifically disclaims the implied warranties of merchantability and fitness for a particular purpose. EXCLUSIVE REMEDIES The remedies provided herein are the Buyer’s sole and exclusive remedies. Wavelength shall not be liable for any direct, indirect, special, incidental, or consequential damages, whether based on contract, tort, or any other legal theory. REVERSE ENGINEERING PROHIBITED Buyer, End-User, or Third-Party Reseller are expressly prohibited from reverse engineering, decompiling, or disassembling this product. NOTICE The information contained in this document is subject to change without notice. Wavelength will not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material. No part of this document may be translated to another language without the prior written consent of Wavelength. SAFETY There are no user-serviceable parts inside this product. Return the product to Wavelength Electronics for service and repair to ensure that safety features are maintained. LIFE SUPPORT POLICY This important safety information applies to all Wavelength electrical and electronic products and accessories: As a general policy, Wavelength Electronics, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the Wavelength product can be reasonably expected to cause failure of the life support device or to significantly affect its safety or effectiveness. Wavelength will not knowingly sell its products for use in such applications unless it receives written assurances satisfactory to Wavelength that the risks of injury or damage have been minimized, the customer assumes all such risks, and there is no product liability for Wavelength. Examples of devices considered to be life support devices are neonatal oxygen analyzers, nerve stimulators (for any use), auto-transfusion devices, blood pumps, defibrillators, arrhythmia detectors and alarms, pacemakers, hemodialysis systems, peritoneal dialysis systems, ventilators of all types, and infusion pumps as well as other devices designated as “critical” by the FDA. The above are representative examples only and are not intended to be conclusive or exclusive of any other life support device.

REVISION HISTORY

DOCUMENT NUMBER: LDTC2-2-00400 REV. DATE CHANGE J August 2014 Extended warranty, updated cable drawings and specification table. K February 2016 Updated WCB301 cable diagram. L January 2019 Updated to new format. Clarified limit-setting procedure. M April 2022 Updated Height Dimensions

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