--- title: "QDAC-II Compact" date: "2024-02-05T08:44:12+00:00" modified: "2025-07-28T11:40:45+00:00" url: "https://www.quantum-machines.co/products/qdac-compact/" description: "Highly stable, low-noise, 24-channel voltage source to control quantum electronics and QPUs. Learn more by clicking this link." --- # QDAC-II Compact ![](https://www.quantum-machines.co/wp-content/uploads/2025/05/QdacII-Compact-1.png) ## Low-Noise Single Rack Unit DAC Advanced DC and Low-Frequency Voltage Source for Ultra-Stable Control of Quantum Devices #### QDAC-II Compact is an ultra-stable voltage source designed for the precise and accurate initialization of quantum devices, setting a new benchmark in the field. With unmatched channel density, it delivers 24 channels in a compact, single-rack-unit form factor. Seamlessly integrated with the [OPX1000](/products/opx1000/) Hybrid Control platform, QDAC-II Compact provides the most comprehensive hybrid control stack for high-performance quantum computing. ## **Compact and Multifunctional** Harness the power of 24 ultra-precise DC voltage sources (±10 V), complete with built-in current sensing and sub-MHz function generators. Its 1U design minimizes the need for space, making it perfect for compact quantum labs. ![](https://www.quantum-machines.co/wp-content/uploads/2025/05/Frame-12-min.png) ## 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. ![](https://www.quantum-machines.co/wp-content/uploads/2025/05/Frame-15-min.png) ## **Seamless Integration with OPX1000 and Smooth Scalability** QDAC-II Compact seamlessly integrates and synchronizes with the OPX1000 Hybrid Control platform. Scale your quantum control infrastructure by stacking multiple OPX1000 hybrid controllers and QDAC-II Compact units in any combination. [Get QDAC-II Compact Spec Sheet](/request-the-qdac-compact-spec-sheet/) ![](https://www.quantum-machines.co/wp-content/uploads/2025/05/Seamless-Scale-with-OPX1000-1-min-1.png) [Get QDAC-II Compact Spec Sheet](/request-the-qdac-compact-spec-sheet/) ## **Advanced Synchronization and Triggering** Synchronize multiple QDAC-II Compact units or external devices with sub-μs accuracy. With an advanced triggering system and external clock compatibility, it ensures seamless coordination for complex signal generation and precise integration in large-scale setups. ![](https://www.quantum-machines.co/wp-content/uploads/2025/05/Asset-5-1-min.png) ## **QDAC-II** QDAC-II is also available in its 4U original QDAC-II hardware version, with 24 BNC connectors. [Get QDAC-II Spec Sheet](/request-the-qdac-compact-spec-sheet/) ![](https://www.quantum-machines.co/wp-content/uploads/2025/05/QDACIIbcd-1-min.png) [Get QDAC-II Spec Sheet](/request-the-qdac-compact-spec-sheet/) ![](https://www.quantum-machines.co/wp-content/uploads/2025/05/QDAC-II-rebranded-2.png) ## Key Features ![](https://www.quantum-machines.co/wp-content/uploads/2025/05/Frame-13-min.png) - 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) - 1M 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 ![](https://www.quantum-machines.co/wp-content/uploads/2025/05/Vector.svg) #### Optimal Signal Quality Ultra-stable voltage source delivering ultra-low noise, minimal crosstalk, and minimal transients for reliable qubit operation. ![](https://www.quantum-machines.co/wp-content/uploads/2025/05/Layer_28.svg) #### 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. ![](https://www.quantum-machines.co/wp-content/uploads/2025/05/Layer_28-1.svg) #### 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. ![](https://www.quantum-machines.co/wp-content/uploads/2025/05/Group-206128.svg) #### Easy to Use Controlled via SCPI, Python, and QCoDeS, with example Jupyter notebooks for quick setup. Includes low-noise cable assembly and setup instructions. Supports advanced QUA integration through the QUAM framework for optimized, synchronized quantum experiments. ## Accelerate the Realization of Practical Quantum Computing [Contact us](/contact-us/) ## Take the Next Step ![](https://www.quantum-machines.co/wp-content/uploads/2023/05/Asset-3.svg) Have a specific experiment in mind and wondering about the best quantum control and electronics setup? [Talk to an Expert](https://www.quantum-machines.co/contact-us/) ![](https://www.quantum-machines.co/wp-content/uploads/2023/02/Group-175897-1.svg) Want to see what our quantum control and cryogenic electronics solutions can do for your qubits? [Request a Demo](https://www.quantum-machines.co/request-demo/)