Quad-channel 8-bit DAC with a single SPI bus
The TLV5627CD from Texas Instruments packs four 8-bit voltage-output DACs into a 16-SOIC package, all fed through a single SPI data interface. The 18 µs settling time means the loop update rate for all four channels is bounded by the serial clock speed and the DAC's own conversion time, not by per-channel sequencing overhead.
Supply rails and reference — what to budget on the board
The reference is external only; the board must carry a precision reference voltage source that sets the output span for all four channels. The output type is voltage-buffered, meaning each DAC channel drives its output through an internal buffer amplifier capable of sourcing or sinking current to the load without an external op-amp.
Accuracy floor for an 8-bit part
Integral non-linearity is ±0.3 LSB typical and differential non-linearity is ±0.03 LSB typical. For an 8-bit converter with 256 code steps, ±0.3 LSB INL means the transfer curve stays within a third of an LSB from the ideal line — well inside the ½-LSB threshold that would cause a missing code. The architecture is a string DAC — a resistor-ladder topology that guarantees monotonicity and gives the low DNL figure.
Temperature grade and package handling
This suits controlled indoor environments — benchtop instrumentation, telecom line cards, or industrial control cabinets with forced airflow — but not extended or automotive ambient. The footprint matches the industry-standard SOIC-16 land pattern; no thermal pad or exposed paddle to route.