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QDAC-II
- Channels 24
- Resolution 25-bit
- Sample Rate 1 MS/s
- Voltage Step 0.12 μV
- Filters 3-range switchable
- Applications Gate, flux bias
QDAC-II is Quantum Machines’ 24-channel, ultra-low-noise voltage source for precise DC and intermediate-frequency control of quantum electronics and QPUs.
Each of its 24 channels runs five voltage generators in parallel, DC, sine, triangle, square, and arbitrary waveform, alongside a dedicated current sensor for gate-leakage detection. A 300 kHz filter handles fast, multi-dimensional gate voltage sweeps during tune-up, then switches to a 10 Hz filter for ultra-low-noise, 25-bit DC operation once the device reaches its operating point, with minimal transients between the two.
Overview
QDAC-II is Quantum Machines’ 24-channel, ultra-low-noise voltage source for DC and intermediate-frequency control of quantum electronics, from gate electrodes to flux bias coils. Its per-channel current sensors and switchable filters make it equally suited to fast tune-up sweeps and stable, long-duration operation points across a full quantum experiment.
Specifications
- 24 channels, 25-bit resolution, 1 MS/s sample rate per channel
- Voltage step size: 0.12 microvolts
- Three switchable low-pass filters: 300 kHz, 10 kHz, 10 Hz cut-off
- Each channel: DC, sine, triangle, square, and arbitrary waveform generators
- Per-channel current sensing for gate-leakage detection and monitoring
- Applications: gate electrodes and flux bias coils for qubits
Additional Information
- Stacks and synchronizes with multiple OPX+ and QDAC-II units as one system
- 25-bit resolution holds in ultra-low-noise DC mode; 20-bit in faster bandwidth modes
- Used for gate-leakage detection, fast tune-up algorithms, and stable operation points
- Also available as QDAC-II Compact, the same features in a 1U footprint
- Made by Quantum Machines, available in India exclusively through Globetek
