Quadra DAC - 4 Channel 12 / 14 / 16 Bits
Quadra DAC - 4 Channel 12 / 14 / 16 Bits
Anabit's Quadra DAC is a four-channel, open-source, buffered voltage-output platform for precise, synchronized analog control. Choose from 16-, 14-, or 12-bit resolutions, which support sampling rates up to 200 kSPS per channel. A precision 2.5 V internal reference sets the span for all channels via a global gain select (1× or 2×), yielding 0–2.5 V or 0–5 V full-scale across every output. The on-board 2.5V reference can be routed out to bias external circuits. Quadra DAC is powered from a single 5 V DC rail, while the digital/SPI circuits can share the 5 V rail or use an auto-detected 1.8–5.0 V logic supply for clean level matching. The LDAC or Load DAC feature enables hardware based timing for simultaneous four-channel updates for phase-coherent steps and edges. Each output is rail-to-rail op-amp buffered; drive capability +/-5mA with built-in short circuit protection.
For deterministic power-on behavior, the Quadra DAC exposes RSTSEL so you can define power-on output state (zero-scale or mid-scale). The design layout, component selection, and power noise filtering stage emphasize low drift and low noise, while the straightforward SPI interface keeps firmware simple—check out our tutorial with example code. Whether you’re trimming setpoints, simulating sensors, or orchestrating synchronized steps, Quadra DAC provides a robust, compact backbone for deterministic analog generation.
Example use cases:
- Industrial / process control: multi-channel setpoints for PLC/DAQ stimulation and closed-loop control
- HIL sensor/actuator simulation: coherent 4-channel analog control signals
- Multi-rail biasing: optics, RF, and precision amplifier bias control
- Filter/ADC/amplifier characterization: DC sweeps and small-signal steps
Product features
Product features
--> 4 Channel DAC with excellent accuracy and low noise specifications. Available in 12 / 14 / 16 bit variants.
--> Supports update rates of ~200kSPS for each output, see settling time specifications for more information
--> Flexibility to control each DAC channel with simultaneous or individual output update control
--> Ability to control the DAC channel's output voltage range, 0 to 2.5V (gain 1) or 0 to 5V (gain 2).
--> Set the power on behavior of the DAC outputs, 0V or midscale.
--> Flexible digital I/O — digital circuit power auto-selects: use the main 5 V, or plug in an optional 2.7–5.0 V digital supply and it routes itself—no jumpers to remember.
--> Low power consumption, especially with the outputs off. Great for portable or remote battery powered applications
Specifications
Specifications
Accuracy (25 °C, no user calibration, internal ref on):
--> 16-bit model: ±(0.10% of reading + 2 LSB)
--> 14-bit model: ±(0.10% of reading + 1 LSB)
--> 12-bit model: ±(0.10% of reading + 1 LSB)
Max SPI clock rate — 50 MHz.
DAC output settling time (¼→¾ Full Scale, to ±2 LSB) — 5 µs typ, 8 µs max (16-/14-bit); 5 µs typ, 7 µs max (12-bit).
Max recommended DAC update rate (from settling spec) — about 200 kS/s typ (1/5 µs); 125–143 kS/s worst-case (1/8–1/7 µs). Derived from settling-time table.
Analog Devices
Analog output drive — Stable for RL ≥ 1 kΩ with CL up to 2 nF (or 10 nF when RL = 1 kΩ). Output current capability ±5 mA (per channel). Short-circuit ≈40 mA
Quadra DAC 5 V input power current consumption (no load) — ~1.1 mA typ, 1.3 mA max with internal reference enabled. Current consumption with max load on outputs 50mA.
Internal 2.5 V reference — 2 ppm/°C typ (5 ppm/°C max) tempco; available on VREF pin and can source ±5 mA to external loads.
Form factor (see tutorial section for pin descriptions):
--> Dimensions: 38 mm x 35.5 mm
--> Mounting holes: 3.5 mm diameter
--> Pin headers: 2.54 mm spacing
Bulk Pricing and Discount Information
Bulk Pricing and Discount Information
Discount for large orders
5% discount for quantities of 10 or above, automatically applied at checkout. Contact Anabit for bulk pricing on quantities of 50 or more.
Resources
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Tutorials
Explore tutorials and getting started guides to get the most out of your product.
Increasing a DAC's Output Accuracy Using the Two-Point Calibration Method
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Open-Source Downloads
Download open source hardware files, including PCB design files and schematic files
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Forum & Discussion
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