QDAC-II Compact is the reduced-size version of the best-selling QDAC-II, with all the same high-performance features in one rack unit. It is an extremely stable, low-noise, 24-channel voltage source to control quantum electronics and QPUs. Highly versatile, the Compact can be used for gate-leakage detection, fast tune-up algorithms, stable operation points, and numerous other applications – all via a single 24-pin Fischer output. 

High-Performance Precision Voltage Generators

QDAC-II Compact is a high-precision, 25-bit resolution, ultra-low-noise DAC with 24 voltage channel generators with a 1 MS/s sample rate and a step size of <0.2 μV. Each of the 24 channels has five voltage generators working in parallel: DC, sine, triangle, square, and arbitrary waveform. 

Fast Tune-Up and Operation Point Control

Performs fast multi-dimensional gate voltage sweeps using a 300 kHz output filter. Once at your operation point, the QDAC is switchable to an ultra-low noise DC voltage with a 10 Hz output filter and 25-bit resolution, with minimal transients. 

Complete and Scalable Solution

QDAC-II Compact is a versatile and easy-to-use solution. Controlled directly by SCPI commands with an endless number of applications, it can be stacked with multiple OPX1000 and QSwitch units to operate as one advanced quantum control system. 

 

 

Key Features

  • Ultra-low noise and ultra-stable 24-channel voltage source in one rack unit
  • Unique low pass filter with 3 ranges that can be switched between with minimal transients: cut-off 300 KHz, cut-off 10 KHz, and cut-off 10 Hz
  • 25-bit resolution in DC mode (10 Hz cut-off), 20-bit in medium and high bandwidth mode (10 kHz and 300 kHz cut-off)
  • One million samples per second per channel
  • Each channel has multiple standard waveform generators and an arbitrary waveform generator
  • Individual high-resolution low-frequency current sensors on every channel, measuring current simultaneously on all channels
  • Advanced triggering and synchronization functions between channels with sub-microsecond precision

Benefits

Optimal Signal Quality

Ultra-stable voltage source delivering ultra-low noise, minimal crosstalk, and minimal transients for reliable qubit operation. 

Compact and Versatile

24 DC voltage sources (±10 V) with built-in current sensing and individual sub-MHz function generators, all in one rack unit, reducing the need for additional instruments.   

Timesaving

Multi-dimensional gate electrode sweeps are performed in less than a second. The advanced triggering system allows the coordination of signals internally or externally with sub-μs precision.

Easy to Use

Controlled directly by SCPI commands or from Python or QCoDeS. Example Jupyter notebooks are provided. Includes flexible, low-noise cable assembly and setup instructions to implement your experiment scripts within minutes.

Additional Resources

Brochures

QDAC-II: Ultra-Low-Noise 24-Channel DAC

Blog

QDevil, a division of Quantum Machines, Niels Bohr Institute, and KU Tech Transfer Office Honored with 2024 Technology Transfer Prize by the German Physical Society

Blog

Quantum Machines Introduces QDAC-II Compact and QSwitch – Ultra-Low-Noise Quantum Electronics Solutions

Brochures

QDAC-II: Ultra-Low-Noise 24-Channel DAC

Blog

QDevil, a division of Quantum Machines, Niels Bohr Institute, and KU Tech Transfer Office Honored with 2024 Technology Transfer Prize by the German Physical Society

Blog

Quantum Machines Introduces QDAC-II Compact and QSwitch – Ultra-Low-Noise Quantum Electronics Solutions

Beyond the Microsecond: A Quantum Revolution in Electron Charge Qubits

QM Product Portfolio: Quantum Control and Electronics

We support any existing qubit processor and quantum device, from millikelvin to room temperature.

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