16-bit R-2R DAC with SPI — board-fit and timing
The MAX542ACSD+ is a single-channel 16-bit digital-to-analog converter using an R-2R ladder architecture, delivering an unbuffered voltage output. Settling time is 1 µs typical, which sets the update rate ceiling for closed-loop control or waveform generation — the SPI data interface must clock in the 16-bit word within that window to avoid throughput bottlenecks. Integral and differential nonlinearity are both ±0.5 LSB, meaning the output stays within half a least-significant bit of the ideal transfer curve — no missing codes across the full 16-bit range. This is a monotonicity guarantee for precision set-point applications.
Both analog and digital supplies are tied to a single 5 V rail — no dual-supply sequencing needed. The 14-SOIC (0.154-inch body width) footprint is a standard JEDEC outline — the PCB land pattern and decoupling capacitor placement follow the same guidelines as any SOIC-14 op-amp or interface IC. Tube packaging suits manual assembly or low-volume reflow; the tube quantity is typically 50 or 56 units per tube depending on the supplier's packing standard.