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DDTC: Diode Driver & Temperature Controller

DDTC: Diode Driver & Temperature Controller


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  • Fully Integrated laser diode driver & temperature controller
  • Low noise current driver for wide variety of low/high compliance laser diodes
  • Multiple layers of diode protection
  • High precision temperature control
  • External modulation inputs
  • Web based interface
  • Ethernet connectivity


Ice Bloc DDTC is an integrated precision diode driver and temperature controller for building laser-based photonic systems in research, experimental and production applications. Driving the latest generation of high power laser diodes, the DDTC combines high current, low noise output with high accuracy, high resolution current set points.

The temperature controller can control either a TEC or resistive heater with user-programmable output current, current polarity, voltage limits, PID feedback parameters and ramp time. Its compact form factor with customisable software interface allows easy integration of the DDTC with experiments or OEM setups.


Output current range 0 - 5 A
Output compliance voltage range 1.2 - 22 V
Output current noise density 1A output: 280 nA and 5A output: 445 nA / √ Hz (DC to 100 kHz)
Current setting resolution 1 mA
Current accuracy ±0.1%
Current temperature stability 75 ppm/°C
Input sensitivity 0.1 A/V
Modulation range 0 - 0.5 A above the set point
Modulation frequency response DC - 20 kHz
Input impedance 840 Ω
Maximum safe input 0 - 5.5 V (protected)
Input impedance 20 Ω (transimpedance)
Transimpedance gain range 80 V/A – 20 k V/A
Maximum safe input ±5 V (protected)
Input linear range ±10 mA
Input resolution 24 bits
Output voltage range 1.2 V - 22 V
Output type Bi-directional, linear
Output current range 0 – 5 A
Current limit range 0.5 A – 5.5 A
Temperature set point resolution 0.001 °K - typical value, steady state
Temperature control stability <1 mK
Set point temperature coefficient <5 ppm/°K
Temperature set point range -20.15 °C to +79.85 °C
NTC thermistor range 10 kΩ - 100 kΩ
Extended thermistor range 1 kΩ - 1 MΩ (slightly lower resolution)
External auxiliary device power supply  
Output voltage 5.5 V
Maximum current 200mA
Open circuit voltage 3.3V
Closed maximum resistance 5.6 kΩ
Maximum safe input voltage ±10 V
Emission LED  
Output voltage +5.5 V
Current limiting resistance 360 Ω
Mains input voltage 100-240 V AC, 50/60 Hz, 350 VA (typical power: 15 W)
Size (W x H x D) Half rack (203mm) x 2U (89mm) x 345mm (8” x 3.5” x 13.6”)
Weight 4.1 kg
Operating temperature 0 °C to 70 °C
Storage temperature -20 °C to 85 °C
Relative humidity <90 % humidity, non-condensing
Indoor/outdoor use Indoor use only
Altitude <2000 m