--- title: "QDAC" date: "2023-04-16T07:14:48+00:00" modified: "2025-11-05T12:08:59+00:00" url: "https://www.quantum-machines.co/products/qdac/" description: "Tune quantum dots and keep them stable with a state-of-the-art multi-channel voltage source solution; by QDevil, part of Quantum Machines" --- # QDAC ![](https://www.quantum-machines.co/wp-content/uploads/2023/11/banner_QDAC2-1.png) ![](https://www.quantum-machines.co/wp-content/uploads/2023/05/QDAC.jpg) A state-of-the-art 25-bit voltage source solution [Get the Spec Sheet](https://www.quantum-machines.co/request-the-qdac-ii-spec-sheet/) [Request a Quote](https://www.quantum-machines.co/request-a-quote-qdac/) #### QDAC-II is a 24-channel high-precision low-noise voltage generator for DC and intermediate-frequency control of quantum electronics and QPUs, including gate electrodes and flux bias coils for qubits. With current sensing and AWGs on each channel, a very versatile instrument that can be used for gate-leakage detection, fast tune-up algorithms, providing stable operation points, and many more applications. ## Precision Voltage Generators QDAC-II 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 0.12 μ. Each of the 24 channels has five voltage generators working in parallel: One for DC, a sine generator, a triangle generator, a square wave generator, and an arbitrary waveform generator. ![](https://www.quantum-machines.co/wp-content/uploads/2023/04/QDAC-shadow-2.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, QDAC-II 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/2023/05/Layer-2.png) ## Complete and Scalable Solution QDAC-II offers a high-performance and versatile solution with an endless number of applications. Multiple OPX+ and QDAC units can be stacked and synchronized to operate as one advanced quantum control system. [Get the Full QDAC-II Spec Sheet](https://www.quantum-machines.co/request-the-qboard-spec-sheet/) ![](https://www.quantum-machines.co/wp-content/uploads/2023/04/QDAC-shadow-4.png) [Get the Full QDAC-II Spec Sheet](https://www.quantum-machines.co/request-the-qboard-spec-sheet/) ![](https://www.quantum-machines.co/wp-content/uploads/2023/04/QDAC-II-rebranded-2.png) ## Key Features ![](https://www.quantum-machines.co/wp-content/uploads/2023/04/QDac-shadow-1-1024x670.png) - Ultra-low noise and ultra-stable 24-channel voltage source - 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 bandwidth mode (10 kHz cut-off), and in high bandwidth (fast) mode (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 ## Why Leading Experts Worldwide Choose Quantum Machines ![](https://www.quantum-machines.co/wp-content/uploads/2024/01/Princeton.jpg) ### Disentangling Losses in Tantalum Superconducting Circuits “QM’s chip packaging solutions are exquisite pieces of engineering that have enhanced our resonator Q-factors to as much as 200 million. It is clearly a very highly engineered product that I’m sure will be widely adopted in the field.” [Check case study>>](https://www.quantum-machines.co/wp-content/uploads/2024/01/Kevin-Princeton.png) ![](https://www.quantum-machines.co/wp-content/uploads/2024/01/Kevin.webp) **PhD Student, Kevin D Crowley** Houck Lab, Princeton University ![](https://www.quantum-machines.co/wp-content/uploads/2024/01/Princeton.jpg) ![](https://www.quantum-machines.co/wp-content/uploads/2023/12/Picture1.png) ### iSWAP with multiplexed readout​ in 10 lines of QUA code​ “We were extremely surprised by the **flexibility** that OPX offers and by how much easier it makes our experiments. Moreover, OPX provides **extreme speed-ups**. No more frustration due to long waiting times for unwanted results!” [See case study>>](https://www.quantum-machines.co/wp-content/uploads/2023/12/Tse-ming.pdf) ![](https://www.quantum-machines.co/wp-content/uploads/2023/12/Picture2.png) **Prof. Tse-Ming Chen** National Cheng Kung University, Taiwan ![](https://www.quantum-machines.co/wp-content/uploads/2023/12/Picture1.png) ![](https://www.quantum-machines.co/wp-content/uploads/2023/11/Picture2.jpg) ### A partner you can trust ”QM's control electronics provide the **best real-time features** along with an **intuitive and well-documented programming** interface. At TII, we successfully **controlled a 25-q chip** and conducted multiplexed characterization of all qubits using QM’s OPX and Octave. What we appreciate most, however, is the QM’s **unwavering support and commitment** to helping us achieve our targets, even going so far as to send some of their best scientists when needed.” ![](https://www.quantum-machines.co/wp-content/uploads/2023/11/1550691783929-300x300.jpg) **Alvaro Orgaz** Lead Quantum Computing Control, TII ![](https://www.quantum-machines.co/wp-content/uploads/2023/11/Picture2.jpg) ![](https://www.quantum-machines.co/wp-content/uploads/2023/10/Picture1.png) ### Substantially reducing coding complexity and time to results “OPX has been a **powerful enabler** in our lab, helping us quickly characterize the performance of our recently discovered qubits. The hardware removes time wasted in uploading and waiting during pulse programming. QUA has **substantially reduced the complexity** of writing quantum protocols, allowing us to code dynamical decoupling and RB sequences in just a few lines. It remarkably s**aves our time** in optimizing the processes and visualizing the results, allowing us to focus more on understanding the physics of our new qubits.” [See case study >>](https://www.quantum-machines.co/wp-content/uploads/2024/01/Dafei-Jin.png) ![](https://www.quantum-machines.co/wp-content/uploads/2023/10/download-1.jpg) **Prof. Dafei Jin** Associate Prof., Dep. of Physics & Astronomy, University of Notre Dame ![](https://www.quantum-machines.co/wp-content/uploads/2023/10/Picture1.png) ![](https://www.quantum-machines.co/wp-content/uploads/2023/10/1-300x265.png) ### RT Bayesian estimation for drifts mitigation and improved coherence time “The OPX’s fast feedback and unique real-time processing capabilities were critical for our experiment. Combining these with the OPX’s intuitive programming and QM’s state-of-the-art cryogenic electronics allowed us to do something that we have dreamt of doing for years.” [See case study >>](https://www.quantum-machines.co/wp-content/uploads/2023/10/Prof.-Ferdinand-Kuemmeth.pdf) ![](https://www.quantum-machines.co/wp-content/uploads/2023/10/CF20_0374_Ferdinand-Kuemmeth-300x263.jpg) **Prof. Ferdinand Kuemmeth** Professor at Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Denmark ![](https://www.quantum-machines.co/wp-content/uploads/2023/10/1-300x265.png) ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/logo-uibk.svg) ### Saved two years of development “Developing a functional qubit control electronic system absorbs a PhD-student full time at least for two years. QM’S Quantum Orchestration Platform allowed us set up experiments for full qubit characterization in 2-3 days with an undergraduate summer school student.” ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/Prof.-Dr.-Gerhard-Kirchmair-1.png) **Prof. Gerhard Kirchmair** University of Innsbruck ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/logo-uibk.svg) ![](https://www.quantum-machines.co/wp-content/uploads/2022/03/usc-logo-trans-300x169.png) ### The QOP dramatically expedites research “We are very pleased with the Quantum Orchestration Platform (QOP) control solution. It’s remarkably easy to use, reliable, and flexible, supporting our advanced quantum research needs. The QOP dramatically expedites our research. The Quantum Machines customer success team has been instrumental in addressing all our needs to help us to maximize the full potential of the solution. We already use two systems and strongly recommend it.” [See case study>>](https://www.quantum-machines.co/wp-content/uploads/2022/03/USC_case-study.jpg) ![](https://www.quantum-machines.co/wp-content/uploads/2022/03/ELI-300x300.png) **Prof. Eli Levenson-Falk** University of Southern California ![](https://www.quantum-machines.co/wp-content/uploads/2022/03/usc-logo-trans-300x169.png) ![](https://www.quantum-machines.co/wp-content/uploads/2022/02/Seoul-National-Lab.png) ### Revolutionizing spin qubit control, all in one box “The quantum orchestration platform (QOP) platform completely changed the way we control semiconductor quantum dot spin qubits. Key qubit control schemes we previously developed individually using time-consuming hardware description languages are now easily implemented in one box.” [See case study>>](https://www.quantum-machines.co/wp-content/uploads/2022/02/Seoul-case-study.jpg) ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/Prof.-Dohum-Kim.png) **Prof. Dohum Kim** Seoul National University ![](https://www.quantum-machines.co/wp-content/uploads/2022/02/Seoul-National-Lab.png) ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/WeizmannLogo-300x114-1.gif) ### Simplified lab workflow and faster runtimes “Replacing three devices with one synchronized, orchestrated machine tremendously simplified lab workflow. Now our pulse sequences run in a fraction of the time of any other device combo. Plus, we can “talk” to the FPGA in human-speak, to run real-time calculations that were too complicated before! Along with the yoga-level.” ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/Prof.-Amit-Finkler.webp) **Prof. Amit Finkler** Weizmann Institute of Science ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/WeizmannLogo-300x114-1.gif) ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/WeizmannLogo-300x114-1.gif) ### This system will revolutionize our space “The first time I was introduced to Quantum Machines, It surprised me how people were getting so excited about it. Only later did I realize, it was like explaining the value of a Laser before it existed, and all you knew are light bulbs. Today I truly believe that these systems will revolutionize our space.” ![Prof. Barak Dayan, Weizmann Institute of Science](https://www.quantum-machines.co/wp-content/uploads/2020/03/Group-283-300x300.png) **Prof. Barak Dayan** Weizmann Institute of Science ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/WeizmannLogo-300x114-1.gif) ## Why Leading Experts Worldwide Choose Quantum Machines Disentangling Losses in Tantalum Superconducting Circuits “QM’s chip packaging solutions are exquisite pieces of engineering that have enhanced our resonator Q-factors to as much as 200 million. It is clearly a very highly engineered product that I’m sure will be widely adopted in the field.” [Check case study>>](https://www.quantum-machines.co/wp-content/uploads/2024/01/Kevin-Princeton.png) ![](https://www.quantum-machines.co/wp-content/uploads/2024/01/Kevin.webp) **PhD Student, Kevin D Crowley** Houck Lab, Princeton University ![](https://www.quantum-machines.co/wp-content/uploads/2024/01/Princeton.jpg) iSWAP with multiplexed readout​ in 10 lines of QUA code​ “We were extremely surprised by the **flexibility** that OPX offers and by how much easier it makes our experiments. Moreover, OPX provides **extreme speed-ups**. No more frustration due to long waiting times for unwanted results!” [See case study>>](https://www.quantum-machines.co/wp-content/uploads/2023/12/Tse-ming.pdf) ![](https://www.quantum-machines.co/wp-content/uploads/2023/12/Picture2.png) **Prof. Tse-Ming Chen** National Cheng Kung University, Taiwan ![](https://www.quantum-machines.co/wp-content/uploads/2023/12/Picture1.png) A partner you can trust ”QM's control electronics provide the **best real-time features** along with an **intuitive and well-documented programming** interface. At TII, we successfully **controlled a 25-q chip** and conducted multiplexed characterization of all qubits using QM’s OPX and Octave. What we appreciate most, however, is the QM’s **unwavering support and commitment** to helping us achieve our targets, even going so far as to send some of their best scientists when needed.” ![](https://www.quantum-machines.co/wp-content/uploads/2023/11/1550691783929-300x300.jpg) **Alvaro Orgaz** Lead Quantum Computing Control, TII ![](https://www.quantum-machines.co/wp-content/uploads/2023/11/Picture2.jpg) Substantially reducing coding complexity and time to results “OPX has been a **powerful enabler** in our lab, helping us quickly characterize the performance of our recently discovered qubits. The hardware removes time wasted in uploading and waiting during pulse programming. QUA has **substantially reduced the complexity** of writing quantum protocols, allowing us to code dynamical decoupling and RB sequences in just a few lines. It remarkably s**aves our time** in optimizing the processes and visualizing the results, allowing us to focus more on understanding the physics of our new qubits.” [See case study >>](https://www.quantum-machines.co/wp-content/uploads/2024/01/Dafei-Jin.png) ![](https://www.quantum-machines.co/wp-content/uploads/2023/10/download-1.jpg) **Prof. Dafei Jin** Associate Prof., Dep. of Physics & Astronomy, University of Notre Dame ![](https://www.quantum-machines.co/wp-content/uploads/2023/10/Picture1.png) RT Bayesian estimation for drifts mitigation and improved coherence time “The OPX’s fast feedback and unique real-time processing capabilities were critical for our experiment. Combining these with the OPX’s intuitive programming and QM’s state-of-the-art cryogenic electronics allowed us to do something that we have dreamt of doing for years.” [See case study >>](https://www.quantum-machines.co/wp-content/uploads/2023/10/Prof.-Ferdinand-Kuemmeth.pdf) ![](https://www.quantum-machines.co/wp-content/uploads/2023/10/CF20_0374_Ferdinand-Kuemmeth-300x263.jpg) **Prof. Ferdinand Kuemmeth** Professor at Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Denmark ![](https://www.quantum-machines.co/wp-content/uploads/2023/10/1-300x265.png) Saved two years of development “Developing a functional qubit control electronic system absorbs a PhD-student full time at least for two years. QM’S Quantum Orchestration Platform allowed us set up experiments for full qubit characterization in 2-3 days with an undergraduate summer school student.” ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/Prof.-Dr.-Gerhard-Kirchmair-1.png) **Prof. Gerhard Kirchmair** University of Innsbruck ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/logo-uibk.svg) The QOP dramatically expedites research “We are very pleased with the Quantum Orchestration Platform (QOP) control solution. It’s remarkably easy to use, reliable, and flexible, supporting our advanced quantum research needs. The QOP dramatically expedites our research. The Quantum Machines customer success team has been instrumental in addressing all our needs to help us to maximize the full potential of the solution. We already use two systems and strongly recommend it.” [See case study>>](https://www.quantum-machines.co/wp-content/uploads/2022/03/USC_case-study.jpg) ![](https://www.quantum-machines.co/wp-content/uploads/2022/03/ELI-300x300.png) **Prof. Eli Levenson-Falk** University of Southern California ![](https://www.quantum-machines.co/wp-content/uploads/2022/03/usc-logo-trans-300x169.png) Revolutionizing spin qubit control, all in one box “The quantum orchestration platform (QOP) platform completely changed the way we control semiconductor quantum dot spin qubits. Key qubit control schemes we previously developed individually using time-consuming hardware description languages are now easily implemented in one box.” [See case study>>](https://www.quantum-machines.co/wp-content/uploads/2022/02/Seoul-case-study.jpg) ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/Prof.-Dohum-Kim.png) **Prof. Dohum Kim** Seoul National University ![](https://www.quantum-machines.co/wp-content/uploads/2022/02/Seoul-National-Lab.png) Simplified lab workflow and faster runtimes “Replacing three devices with one synchronized, orchestrated machine tremendously simplified lab workflow. Now our pulse sequences run in a fraction of the time of any other device combo. Plus, we can “talk” to the FPGA in human-speak, to run real-time calculations that were too complicated before! Along with the yoga-level.” ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/Prof.-Amit-Finkler.webp) **Prof. Amit Finkler** Weizmann Institute of Science ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/WeizmannLogo-300x114-1.gif) This system will revolutionize our space “The first time I was introduced to Quantum Machines, It surprised me how people were getting so excited about it. Only later did I realize, it was like explaining the value of a Laser before it existed, and all you knew are light bulbs. Today I truly believe that these systems will revolutionize our space.” ![Prof. Barak Dayan, Weizmann Institute of Science](https://www.quantum-machines.co/wp-content/uploads/2020/03/Group-283-300x300.png) **Prof. Barak Dayan** Weizmann Institute of Science ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/WeizmannLogo-300x114-1.gif) ![](https://www.quantum-machines.co/wp-content/uploads/2024/01/Princeton.jpg) Disentangling Losses in Tantalum Superconducting Circuits ![](https://www.quantum-machines.co/wp-content/uploads/2023/12/Picture1.png) iSWAP with multiplexed readout​ in 10 lines of QUA code​ ![](https://www.quantum-machines.co/wp-content/uploads/2023/11/Picture2.jpg) A partner you can trust ![](https://www.quantum-machines.co/wp-content/uploads/2023/10/Picture1.png) Substantially reducing coding complexity and time to results ![](https://www.quantum-machines.co/wp-content/uploads/2023/10/1-300x265.png) RT Bayesian estimation for drifts mitigation and improved coherence time ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/logo-uibk.svg) Saved two years of development ![](https://www.quantum-machines.co/wp-content/uploads/2022/03/usc-logo-trans-300x169.png) The QOP dramatically expedites research ![](https://www.quantum-machines.co/wp-content/uploads/2022/02/Seoul-National-Lab.png) Revolutionizing spin qubit control, all in one box ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/WeizmannLogo-300x114-1.gif) Simplified lab workflow and faster runtimes ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/WeizmannLogo-300x114-1.gif) This system will revolutionize our space ## Benefits ![](https://www.quantum-machines.co/wp-content/uploads/2023/04/Icon-Multiple-waveforms.svg) #### Multiple Waveforms Each of the 24-channels has five voltage generators working in parallel: one for DC, a sine, triangle and square wave generator, and an arbitrary waveform generator (1 million points/second) ![](https://www.quantum-machines.co/wp-content/uploads/2023/04/Icon-Built-in-sensors.svg) #### Built-in Sensitive Current Sensors Each channel includes a DC current sensor with a resolution down to a few tens of pA, typically used for gate leakage detection and with sample rates up to 3 kHz ![](https://www.quantum-machines.co/wp-content/uploads/2023/04/Icon-Ultra-stable-voltage.svg) #### Ultra Stable Voltage Source Low noise floor (<20 nV/√Hz), ensuring reliable qubit operation points ![](https://www.quantum-machines.co/wp-content/uploads/2023/04/Icon-Reduce-costs.svg) #### Reduces Experiment Setup Costs Built-in function generators (including AWG) and current sensors reduce the need for additional instruments ### Additional Resources Brochures QDAC-II: Ultra-Low-Noise 24-Channel DAC [ Read More ](https://www.quantum-machines.co/resources/brochures/qdac-ii-ultra-low-noise-24-channel-dac/) Blog **Quantum Machines Introduces QDAC-II Compact and QSwitch – Ultra-Low-Noise Quantum Electronics Solutions** [ Read More ](https://www.quantum-machines.co/blog/qm-introduces-quantum-electronics-solutions-qdac-and-qswitch/) 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** [ Read More ](https://www.quantum-machines.co/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/) Brochures QDAC-II: Ultra-Low-Noise 24-Channel DAC [Read More](https://www.quantum-machines.co/resources/brochures/qdac-ii-ultra-low-noise-24-channel-dac/) Blog **Quantum Machines Introduces QDAC-II Compact and QSwitch – Ultra-Low-Noise Quantum Electronics Solutions** [Read More](https://www.quantum-machines.co/blog/qm-introduces-quantum-electronics-solutions-qdac-and-qswitch/) 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** [Read More](https://www.quantum-machines.co/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/) ## More Products ![](https://www.quantum-machines.co/wp-content/uploads/2024/02/OPX1000-new.png)### OPX1000 A state-of-the-art controller designed for large-scale quantum computers. ![](https://www.quantum-machines.co/wp-content/uploads/2024/02/QSwitch-1.jpg)### QSwitch A versatile low-frequency signal routing box with 240 software-controlled relays. [ Learn More ](https://www.quantum-machines.co/products/qswitch/) ![](https://www.quantum-machines.co/wp-content/uploads/2024/02/QDAC-II-compact-1.jpg)### QDAC-II Compact An extremely stable, low-noise, 24-channel, single rack unit DAC. [ Learn More ](https://www.quantum-machines.co/products/qdac-compact/) ![](https://www.quantum-machines.co/wp-content/uploads/2023/04/QBox.2-1.png)### QBox Reliable 24-channel fully shielded Fischer connector to BNC breakout box, with sample protection. [ Learn More ](https://www.quantum-machines.co/products/qbox/) ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/octave-mob-bg-small.png)### Octave Auto-calibrated IQ mixing and local oscillator system, for signals up- and down- conversion, extending the OPX+ range to 18GHz. [ Learn More ](https://www.quantum-machines.co/products/octave/) ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/OPX2.png)### OPX+ FPGA-based controller for real-time quantum sequences, offering the lowest analog feedback latency and the shortest runtimes. [ Learn More ](https://www.quantum-machines.co/products/opx/) ![](https://www.quantum-machines.co/wp-content/uploads/2023/11/QBoard-II-1.png)### QBoard-II A modular, PCB-based sample holder system for low-temperature spin-qubit chips, general transport experiments, and superconducting circuits. [ Learn More ](https://www.quantum-machines.co/products/qboard/) ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/QCage.2-1.png)### QCage Sample holder for microwave resonators-based quantum devices, allowing high-fidelity operation of tens of qubits up to 18 GHz. [ Learn More ](https://www.quantum-machines.co/products/qcage/) ![](https://www.quantum-machines.co/wp-content/uploads/2023/03/QFilter2.png)### QFilter-II Compact multi-stage low-pass cryogenic filter ensuring millikelvin electron temperature in 24 lines simultaneously. [ Learn More ](https://www.quantum-machines.co/products/qfilter/) ## 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/)