Wavelength Electronics

The PLD Series Laser Diode Drivers deliver the reliability and performance you expect from a Wavelength Electronics laser driver in a compact and easy-to-integrate package. Tens of thousands of  PLD drivers are deployed in particle counters, manufacturing vision systems, wavefront scanners, fiber aligners, and other laser systems around the world, proving beyond doubt the reliability and  stability of the design.The PLD drivers operate from a single 5 V power supply. To accommodate high compliance lasers, or multiple stacked lasers, the PLD laser diode drivers allow the laser to be driven from a separate power supply up to 30 V.

The QCL OEM Series drivers use patented1 circuitry to produce the lowest current noise density of any commercially available QCL driver. The 500 mA QCL driver exhibits noise performance of 0.5 µA RMS to 100 kHz, and average current noise density of 1 nA / √Hz - the lowest available. In order to maintain their characteristically tight center linewidths and minimize jitter, quantum cascade lasers must be powered by drivers with exceptionally low current noise density. Our customers have reported achieving narrower linewidths with these drivers than any other they've used.Key Features Off-the-shelf models at 500 mA, 1 A, 1.5 A, 2 A Can be delivered in other current ranges up to 2 A Compliance voltage 16 V (standard), Compliance 7-20 V with factory modification Safety features protect your QCL investment Adjustable soft-clamping current limit Brown-out, reverse-voltage, & over-voltage protection Driver over-temperature protection circuit Relay shorts output when current is disabled Local and Remote Power-On and Enable control,TTL-compatible Analog modulation input between -5V and +5V.

The advanced and reliable circuitry of the HTC Series achieves 0.0009°C temperature stability. Its low profile package is ideal for designs with space constraints. The ultrastable linear, PI control loop offers maximum stability while the bipolar current source has been designed for higher efficiency. The HTC1500 drives up to 1.5 A for either Thermoelectrics (bipolar) or Resistive Heaters (unipolar). The HTC3000 drives up to ±3 A. An evaluation board simplifies prototyping: HTCEVALPCB. A heatsink that mounts directly to the HTC is available: HTCHTSK. The HTC1500 is designed for 0.031" thick printed circuit boards (PCBs). The HTC1500-62 is designed for 0.062" thick PCBs. The HTC Series temperature controllers are easily configured for any design. Virtually any type of temperature sensor can be used with the HTC and a built in sensor bias current source simplifies use with resistive temperature sensors. The independently adjustable Proportional Gain (P) and Integrator Time Constant (I) can be modified to optimize temperature overshoot and stability.Other features offer added flexibility. A single resistor sets the maximum output current to load. Add a diode to operate resistive heaters with a unipolar output current. An onboard reference voltage simplifies potentiometer control of the temperature setpoint. You can also choose to operate remotely with an external setpoint voltage. Two monitor pins provide access to the temperature setpoint voltage and the actual sensor voltage.The HTC1500 has proven reliable in such diverse fields as medical, defense, communications and manufacturing. The HTC is particularly suited to applications where temperature is scanned across ambient. Key Features Compact Size - 1.5 and 3.0 A Models Interfaces with Thermistors, IC Sensors, &RTDs Single supply operation +5 V to +12 VDC (contact factory for higher voltage operation) +11 V compliance with +12 V input Stabilities as low as 0.0009°C Temperature Setpoint, Output Current Limit, Sensor Bias, Proportional Gain, and Integrator Time Constant are User Adjustable Monitor outputs for Temperature Setpoint and Actual Temperature Linear Bipolar or Unipolar Output operates thermoelectrics or resistive heaters

The robust circuitry of the PID1500 achieves 0.003°C temperature stability. Onboard controls make this package plug and play. The linear, PI control loop offers maximum stability while the bipolar current source has been designed for higher efficiency. The PID1500 drives up to 1.5 A for either Thermoelectrics (bipolar) or Resistive Heaters (unipolar). An evaluation board simplifies prototyping: PIDEVALPCB. Heatsinking is already provided to support operation across a -20°C to +85°C operating range. The PID1500 temperature controller is easily configured for any design. Virtually any type of temperature sensor can be used with the PID1500 and a built in switchable sensor bias current source simplifies use with resistive temperature sensors. The Proportional Gain (P) is adjustable with an onboard single turn trimpot. Use an onboard trimpot to adjust the setpoint or the Analog Input pin for  remote control. Use another onboard trimpot to set the maximum output current to the load or set it with a resistor between pins 1 & 2. A switch between those pins acts as a remote enable / disable. Remove a jumper to operate resistive heaters with a unipolar output current. Two monitor pins provide access to the temperature setpoint voltage and the actual sensor voltage.The PID1500 has proven reliable in such diverse fields as spectroscopy, defense, and medical research. Key Features Single supply operation: +5 V to +12 V Up to 1.5 A output current available < 0.005°C stability (24-hour) Adjustable current limit Remote Analog Input to adjust Temperature Setpoint Supports Thermistors, IC Sensors, or RTDs Temperature Setpoint, Proportional Gain, and Current Limit are user adjustable Remotely Enable/Disable output Can be wired for Resistive Heater control

The advanced and reliable circuitry of the HTC series achieves 0.0009°C temperature stability. Its small, low profi le package is ideal for designs with space constraints. The linear, PI control loop offers maximum stability while the bipolar current source has been designed for higher efficiency.The HTC temperature controllers are easily configured for any design. Virtually any type of temperature sensor can be used with the HTC and a built in sensor bias current source simplifi es use with resistive temperature sensors. The independently adjustable Proportional Gain (P) and Integrator Time Constant (I) can be modifi ed to optimize temperature overshoot and stability.Other features offer added flexibility. A single resistor sets the maximum output current to your load. Add a diode to operate resistive heaters with a unipolar output current. An onboard reference voltage simplifies potentiometer control of the temperature setpoint. You can also choose to operate remotely with an external setpoint voltage. Two monitor pins provide access to the temperature setpoint voltage and the actual sensor voltage. Key Features Compact Size - 1.5 and 3.0 A Models Interfaces with Thermistors, IC Sensors, & RTDs Single supply operation +5 V to +12 VDC (contact factory for higher voltage operation) +11 V compliance with +12 V input Stabilities as low as 0.0009°C Temperature Setpoint, Output Current Limit, Sensor Bias, Proportional Gain, and Integrator Time Constant are User Adjustable Monitor outputs for Temperature Setpoint and Actual Temperature Linear Bipolar or Unipolar Output operates thermoelectrics or resistive heaters

The PLD Series Laser Diode Drivers deliver the reliability and performance you expect from a Wavelength Electronics laser driver in a compact and easy-to-integrate package. Tens of thousands of PLD drivers are deployed in particle counters, manufacturing vision systems, wavefront scanners, fiber aligners, and other laser systems around the world, proving beyond doubt the reliability and stability of the design. The PLD drivers operate from a single 5 V power supply. To accommodate high compliance lasers, or multiple stacked lasers, the PLD laser diode drivers allow the laser to be driven from a separate power supply up to 30 V. Key Features Models: 200 mA, 500 mA, 1.25 A, 5 A, and 6.5 A Operates from a 5 VDC supply Separate power supply can be used to drive high-compliance lasers up to 28 V Constant Current or Constant Power modes Safety features protect your laserAdjustable latching current limitSlow-start circuitryRelay shorts output when current is disabled Local and Remote Power-On and Enable controls Integral heatsink and fan on high current model

The PTC-CH Series Chassis Mount Temperature Controllers deliver the precision performance and long-term reliability you expect from a Wavelength Electronics temperature controller. PTC-CH Series controllers are found in such diverse applications as particle and droplet measurement, manufacturing machine vision systems, biomolecular interaction analysis, and more. They are CE certified. A PDF version of the Declaration of Conformance is available.PTC-CH controllers are available in different models so you can choose the one that best suits your application: PTC2.5K-CH delivers up to ±2.5 A output current PTC5K-CH for applications requiring up to ±5 A PTC10K-CH drives up to ±10 A PTC10K-SL can be tied to the 10 A driver to deliver a combined ±20 A output current The PTC-CH controllers operate from a single power supply between 4.5 V and 30 V. The linear bipolar controller drives a Peltier thermoelectric cooler or a resistive heater, and the chassis-mount package integrates easily into OEM applications. PTC-CH controllers interface with a variety of temperature sensors, and the bias current is adjustable in order to maximize controller sensitivity and stability for your application. The compact chassis-mount design simplifies heatsinking and requires minimal space. PTC-CH controllers are quick to configure for your prototype project, and there are no surprises when it's time to integrate the controller into the final design. If you are using a Quantum Cascade Laser or need low noise performance with a laser diode, we offer the PTC-CH nested in the QCL OEM drivers. Information is available here. Key Features Built-in features make your product more robust to real-world operating conditions and minimize your electronics overhead: If the optional remote temperature setpoint signal is lost, the controller defaults to a standard "safe" temperature setpoint (25ºC when a 10 kΩ thermistor is used). The safe temperature can be changed at the factory; call for details. An on-board trimpot is used to set the output current limit to prevent over-driving the TEC, and helps protect your load from thermal runaway situations. Proportional gain is easily adjusted with an on-board trimpot. Low temperature coefficient design remains stable across a wide range of ambient conditions. When used with Wavelength's laser drivers, such as the PLD Series, these temperature controllers provide stable and reliable performance that sets your system apart from your competitors' and keeps your customers satisfied.

The PLD10K-CH is a 10 A Laser Diode Driver in a small chassis mount package. Operating from a single +5 V supply minimizes internal heat dissipation. Modular packaging makes it easy to integrate the PLD into your system. For applications that require a higher forward voltage, a separate laser diode power supply input lets you provide a higher compliance voltage.Key Features Models: 5 A, 10 A, 12.5 A 5 A and 10 A models operate from a single 5 VDC supply; 12.5 A model requires two supplies Separate power supply can be used to drive high-compliance lasers up to 28 V Constant Current or Constant Power modes Safety features protect your laserAdjustable latching current limitSlow-start circuitry Local and Remote Enable controls

The PLD10000 is powered by a 5 V supply, and the laser can be driven from the same supply. High-compliance lasers can be driven by using a separate supply up to 30 V. Key Features Two models: 10 A and 12.5 A output current PLD10000 can be operated from a 5 VDC supply Separate power supply can be used to drive high-compliance lasers, up to 27.5 V Constant Current or Constant Power modes Safety features protect your laserAdjustable latching current limitSlow-start circuitry Remote Enable controls Optimized heatsink and fan simplifi es integration

The PTC Series PCB-Mount Temperature Controllers are based on our long-proven PTC-CH linear controllers, and deliver the precision performance and reliability you expect from Wavelength Electronics. PTC Series controllers are found in such diverse applications as particle and droplet measurement, communications, manufacturing test, and medical systems.The PTC controllers operate from a single power supply between 5 V and 30 V, and two models drive ±5 A or ±10 A to a Peltier thermoelectric cooler or a resistive heater. These controllers mount directly to your circuit board. PTC controllers interface with a variety of temperature sensors, and the bias current is adjustable in order to maximize controller sensitivity and stability for your application. You can use the PTCEVAL board to quickly confi gure the PTC controller for prototyping. Using the same controller for development and production helps guarantee there are no surprises when it's time to integrate the final design. Key Features Drive ±5 or ±10 A of TEC or heater current Single supply operation: 5 to 30 VDC Small package: 2.32" x 2.15" x 3.85" Remote Output Enable and Temperature Setpoint controls Short term stability of 0.0012°C (off-ambient) Long term stability 0.002°C Selectable sensor bias current Adjustable current limit PI Control with "Smart Integrator" Failsafe Setpoint default in case of remote temperature setpoint signal error

The PLD12.5K-CH is a 12.5 A Laser Diode Driver in a small chassis mount package. Modular packaging makes it easy to integrate the PLD into your system. For applications that require a higher forward voltage, a separate laser diode power supply input lets you provide a higher compliance voltage. One power supply is required for the internal electronics; a separate supply is required to power the laser diode.Key Features Models: 5 A, 10 A, 12.5 A 5 A and 10 A models operate from a single 5 VDC supply; 12.5 A model requires two supplies Separate power supply can be used to drive high-compliance lasers up to 28 V Constant Current or Constant Power modes Safety features protect your laser »» Adjustable latching current limit»» Slow-start circuitry Local and Remote Enable controls

The high current PLD drivers couple the high-reliability architecture of Wavelength Electronics' lower-current PLD Series with a robust high-current output stage. Tens of thousands of PLD drivers are deployed in laser systems around the world, proving beyond doubt the reliability and stability of the design. PLD Series laser power supplies are found in fiber laser pumping, materials processing, pyrotechnic ignition, industrial welding and cutting applications, and laser diode LIV testers. It is CE certified. A PDF version of the Declaration of Conformance is available.The PLD10000 drives up to 10 A, and the PLD12500 drives up to 12.5 A. With a compliance voltage capability of 27.5 volts, these PLD drivers are ideal for driving laser bars and stacks for high-power industrial applications. Lower-current drivers are offered in the PLD Series, available in SIP PCB-mounted models at 200 mA, 500 mA, 1.25 A, 5 A, and 6.5 A output.Key Features Two models: 10 A and 12.5 A output current PLD10000 can be operated from a 5 VDC supply Separate power supply can be used to drive high-compliance lasers, up to 27.5 V Constant Current or Constant Power modes Safety features protect your laserAdjustable latching current limitSlow-start circuitry Remote Enable controls Optimized heatsink and fan simplifies integration

The LDTC Laser Diode Driver and Temperature Controller combines Wavelength's proprietary FL500 and highly stable WTC3243 in one compact module. LDTC modules are in use around the world providing trouble-free reliability in range finders, telecom laser modules, military-aerospace research and development, airborne metrology, academic research, laser diode LIV testers, and more.Key Features Small package size Single supply operation possible LD current range 500 mA or 1 A Compatible with Type A and B lasers Slow start laser diode protection Constant Current or Constant Power modes Adjustable laser diode current limit Brownout protection Drive up to ±2.2 A of TEC current Internal or External setpoint control Failsafe setpoint default Ultra-stable PI control loop Separate Heat & Cool current limits

These Low Noise QCL Drivers have the lowest current noise density of any commercially available driver. Powering your QCL with this patented driver will enable better performance - at lower cost and in less time - than otherwise possible. This is the right driver for lasers that require a high-precision and ultra-low noise current source. The 500 mA QCL laser driver exhibits noise performance of 0.5 µA RMS to 100 kHz, and an average current noise density of 1.5 nA / √Hz - the lowest available today.Key Features Off-the-shelf models at 500 mA, 1 A, 1.5 A, 2 A Can be delivered in other current ranges up to 2 A Compliance voltage 16 V (standard), Compliance 7-20 V with factory modification Safety features protect your QCL investmentAdjustable soft-clamping current limitBrown-out, reverse-voltage, & over-voltage protectionDriver over-temperature protection circuitRelay shorts output when current is disabled Local and Remote Power-On and Enable control, TTL-compatible

The LDTC 2/2 combines a 2.2 Amp laser driver and 2.2 Amp temperature controller on one small board. Available as an open frame or in a chassis mount enclosure.The WTC3243 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 heart of the laser driver section is the WLD3343 2.2 Amp Laser Driver. It maintains precision laser diode current (Constant Current mode) or stable photodiode current (Constant Power mode) using electronics compatible with A/B Type lasers.Ideal for integrated laser driver or LED packages that include termperature control, often utilized in medical diagnostic equipment, remote sensing, analytical instrumentation, military and communications applications. Key Features LDTC2/2 Small package size Single supply operation possible Cost Effective Key Features Laser Diode Driver Default current range is 2.2 A. Custom ranges,from 3 mA up, are easily configured Slow start laser diode protection Constant Current or Constant Power modes Compatible with A or B type laser diodes Adjustable laser diode current limit Remote TTL Shutdown / Interlock Key Features Temperature Controller Drive up to 2.2 A of TEC current Set temp using D/A - includes default to 1 Volt to avoid drive when D/A is turned off or signal is lost Ultra-stable PI control loop Separate Heat & Cool current limits Single power supply operation possible

The WTC3293-14001 is a mini-instrument temperature controller with a temperature (not resistance) display and onboard adjustments.Wrapped around the precision WTC3243 temperature controller, it is configured for use with a TCS610 thermistor. Wire your thermoelectric cooler and thermistor to the board with the cable provided. Add the appropriate DC power supply and indicate the input voltage on the jumper. With the output disabled, adjust the on-board 12-turn trimpot and watch the setpoint temperature change on the  4-digit display. Switch to Actual temperature and display your thermistor temperature. Watch the LED tree to see "over/under temperature" or "stable at setpoint" status. Enable the output current and watch the temperature quickly lock in on the setpoint.The green LED on the In-Range indicator lights when actual temperature is within 0.05°C of the setpoint. If the actual temperature exceeds the setpoint, the upper LED will light. If it is below the  setpoint temperature, the lower LED will light.The WTC3293-14001 has been designed to work with various thermoelectrics driving up to ±2.2 Amps. It operates with +7 V, +9 V, or +12 V input voltage. Key Features Low noise, maximum temperature stability commercially available Display thermistor temperature directly - no tables to convert resistance to temperature LED indicator shows over temperature, stable at setpoint, or under temperature status Adjust setpoint with a 12-turn potentiometer or an external voltage Control temperature using a 10 k© thermistor Fixed resistors set Proportional Gain, Integrator Time Constant, and thermoelectric current limits Enable/Disable Output Current Switch Includes Output Cable & DC Power Supply Works with a wide range of thermoelectrics

The MPL2500 is a very low noise laser diode driver, It operates from +12 to +15 V and is very easy to set up for any laser diode / photodiode configuration, Cabling to the female Dsub15 connector is available: WCB102. Key Features Low Noise - up to 2.5 A LD current Operates all LD / PD pin configurations Single supply operation: +12 to +15 V Slow Start & Current Limit Protection Mechanical Relay Protection RMS Noise and Ripple: < 10 μA 24 hour Current Stability: < 75 ppm Constant Current or Constant Power Mode Onboard setpoint and limit controls Size: 3.55 x 3.5 x 1" chassis mount

The PTC-CH Series Chassis Mount Temperature Controllers deliver the precision performance and long-term reliability you expect from a Wavelength Electronics temperature controller. PTC-CH Series controllers are found in such diverse applications as particle and droplet measurement, manufacturing machine vision systems, biomolecular interaction analysis, and more.The PTC-CH controllers operate from a single power supply between 4.5 V and 30 V, and a selection of models allows you to optimize the current output level for your application. The linear bipolar controller drives a Peltier thermoelectric cooler or a resistive heater, and the chassis-mount package integrates easily into OEM applications. PTC-CH controllers interface with a variety of temperature sensors, and the bias current is adjustable in order to maximize controller sensitivity and stability for your application.The compact chassis-mount design simplifies heatsinking and requires minimal space. PTC-CH controllers are quick to configure for your prototype project, and there are no surprises when it's time to integrate the controller into the final design.Practical Features For Real-World Conditions Built-in features make your product more robust to real-world operating conditions and minimize your electronics overhead: If the optional remote temperature setpoint signal is lost, the controller defaults to a standard "safe" temperature setpoint (25ºC when a 10 k© thermistor is used). The safe temperature can be changed at the factory; call for details. An on-board trimpot is used to set the output current limit to prevent over-driving the TEC, and helps protect your load from thermal runaway situations. Proportional gain is easily adjusted with an on-board trimpot. Low temperature coefficient design remains stable across a wide range of ambient conditions. When used with Wavelength's laser drivers, such as the PLD Series, these temperature controllers provide stable and reliable performance that sets your system apart from your competitors' and keeps your customers satisfied. Key Features Drive up to ±2.5, ±5.0, or ±10.0 A of linear bipolar TEC or heater current Add a booster unit to drive up to ±20.0 A Single supply operation: 5 to 30 VDC Small package: 3.0" x 3.2" x 1.1" Use a wide variety of temperature sensors Remote Output and Setpoint controls Short term stability: 0.0012°C Selectable sensor bias current Adjustable current limit Failsafe Setpoint default in case of remote temperature setpoint signal error

Combine the drive power of the WLD3343 with the temperature stability of the WTC3243.The LDTC 2/2 combines a 2.2 Amp laser driver and 2.2 Amp temperature controller on one small board. Available as an open frame or in a chassis mount enclosure. The WTC3243 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 heart of the laser driver section is the WLD3343 2.2 Amp Laser Driver. It maintains precision laser diode current (Constant Current mode) or stable photodiode current (Constant Power mode) using electronics compatible with A/B Type lasers.Key Features Laser Diode Driver: Default current range is 2.2 A. Custom ranges,from 3 mA up, are easily configured Slow start laser diode protection Constant Current or Constant Power modes Compatible with A or B type laser diodes Adjustable laser diode current limit Remote TTL Shutdown / Interlock Key Features Temperature Controller: Drive up to 2.2 A of TEC current Set temp using D/A - includes default to 1 Volt to avoid drive when D/A is turned off or signal is lost Ultra-stable PI control loop Separate Heat & Cool current limits Single power supply operation possible

The LDD P Series of laser diode drivers come in three compact models to work with all laser diode / photodiode configurations. Each model is available in 200 mA and 400 mA versions to best fit your laser diode requirements. When it is essential to have high performance in your application, these low noise drivers offer excellent current stability in constant current mode or power stability in constant power mode. Precisely control the laser diode or photodiode setpoint current with the on-board Output Current Adjust trimpot or via a remote voltage to the modulation input. The modulation input's small signal 3 dB bandwidth is DC to 2 MHz in constant current mode and dependent on photodiode speed in constant power mode.Key Features Up to 400 mA Current Drive Capacity Operates in Constant Current or Constant Power Modes +5 to +12 V single supply operation Output power stability <0.02% typical (24 hours, ambient conditions) 12-Turn Trimpots control Current Setpoint and Limit Setpoint Operates all low power Laser Diodes Constant Current Modulation to 2 MHz Slow start circuitry Buffered Measurement Outputs

The LDD P Series of laser diode drivers come in three compact models to work with all laser diode / photodiode configurations. Each model is available in 200 mA and 400 mA versions to best fit your laser diode requirements. When it is essential to have high performance in your application, these low noise drivers offer excellent current stability in constant current mode or power stability in constant power mode. Precisely control the laser diode or photodiode setpoint current with the on-board Output Current Adjust trimpot or via a remote voltage to the modulation input. The modulation input's small signal 3 dB bandwidth is DC to 2 MHz in constant current mode and dependent on photodiode speed in constant power mode.Key Features Up to 400 mA Current Drive Capacity Operates in Constant Current or Constant Power Modes +5 to +12 V single supply operation Output power stability <0.02% typical (24 hours, ambient conditions) 12-Turn Trimpots control Current Setpoint and Limit Setpoint Operates all low power Laser Diodes Constant Current Modulation to 2 MHz Slow start circuitry Buffered Measurement Outputs

The LDD P Series of laser diode drivers come in three compact models to work with all laser diode / photodiode configurations. Each model is available in 200 mA and 400 mA versions to best fit your laser diode requirements. When it is essential to have high performance in your application, these low noise drivers offer excellent current stability in constant current mode or power stability in constant power mode. Precisely control the laser diode or photodiode setpoint current with the on-board Output Current Adjust trimpot or via a remote voltage to the modulation input. The modulation input's small signal 3 dB bandwidth is DC to 2 MHz in constant current mode and dependent on photodiode speed in constant power mode.Key Features Up to 400 mA Current Drive Capacity Operates in Constant Current or Constant Power Modes +5 to +12 V single supply operation Output power stability <0.02% typical (24 hours, ambient conditions) 12-Turn Trimpots control Current Setpoint and Limit Setpoint Operates all low power Laser Diodes Constant Current Modulation to 2 MHz Slow start circuitry Buffered Measurement Outputs

The MPL250 is a very low noise laser diode driver. It operates from +12 to +15 V and is very easy to set up for any laser diode / photodiode configuration. Cabling to the female Dsub15 connector is available: WCB102. A smaller low noise laser diode driver is available in the FL500. Two photodiode ranges provide variable sensitivities for optimum operation. You can maintain excellent stabilty when operating in both constant current and constant power mode. Setpoint and current limit trimpots are easilly accessible and offer precision control. A slow start circuit, mechanical shorting relay, and current limit offer maximum protection for your laser diode even when power is removed. The level of current set by the current limit is always drawn from the DC power supply.

The QCL Series drivers use patented circuitry to produce the lowest current noise density of any commercially available QCL driver. The 500 mA QCL driver exhibits noise performance of 0.5 µA RMS to 100 kHz, and average current noise density of 1 nA / √Hz - the lowest available. Key Features Off-the-shelf models at 500 mA, 1 A, 1.5 A, 2 A Can be delivered in other current ranges up to 2 A Compliance voltage 16 V (standard),Compliance 7-20 V with factory modification Safety features protect your QCL investment » Adjustable soft-clamping current limit» Brown-out, reverse-voltage, & over-voltage protection» Driver over-temperature protection circuit» Relay shorts output when current is disabled Local and Remote Power-On and Enable control,TTL-compatible Applications: The QCL Series drivers are used in trace element detection systems, both laboratory-based and field-deployed. This driver is well suited to applications requiring fast measurement times and ultra high sensitivity.