What this 16-bit DAC brings to the rail
The Texas Instruments DAC80501MDQFT is a single-channel, 16-bit voltage-output digital-to-analog converter built around an R-2R ladder architecture. It delivers a buffered voltage output with a typical settling time of 5µs, making it a fit for precision control loops, waveform generation, and programmable voltage references where the output needs to land fast and stay accurate. Both the analog and digital supply rails run from a single 2.7V to 5.5V supply, which simplifies power distribution — no separate AVDD and DVDD rails to route. The digital interface supports both I2C and SPI, so it can drop into existing bus architectures without a protocol translator. The -40°C to 125°C operating range covers industrial and automotive under-hood environments. That temperature grade, combined with the 2x2 mm 8-WSON package, means this part can live on a compact board near a hot processor or motor driver without derating concerns.
Package and mounting
The 5µs typical settling time to ±0.5 LSB means the output voltage reaches its final value within one 200 kHz update cycle. That is fast enough for most closed-loop analog control systems running below 100 kHz update rates, but if you are pushing 1 Msps through an external sample-and-hold, the DAC's own settling will be the bottleneck. INL and DNL are both specified at ±1 LSB maximum. That guarantees monotonicity — the output always increases when the digital code increments — which matters for servo positioning and ramp generation where a non-monotonic step would cause a control reversal. The ±1 LSB DNL also means no missing codes at 16-bit resolution.
Supply and interface: one rail, two buses
With a single 2.7V to 5.5V supply covering both analog and digital domains, the DAC80501MDQFT runs cleanly off a 3.3V or 5V rail. No separate analog regulator needed unless the system's digital rail is noisy — in that case, a ferrite bead and 1 µF cap on the AVDD pin is the usual fix. The I2C and SPI interfaces share the same pins, selected by the state of a dedicated pin at power-up. SPI mode supports clock rates up to 50 MHz (typical), while I2C runs at standard/fast mode up to 400 kHz. The 8-WSON package has an exposed thermal pad that should be soldered to a ground plane for heat sinking, even though the part's quiescent current is low.
Lifecycle and sourcing reality
The DAC80501MDQFT carries an Active product status with ROHS3 compliance.