5 ns settling — the speed axis for this multiplying DAC
The AD9768SE is an 8-bit multiplying DAC from the AD9768 series, delivering a current-buffered output with a 5 ns settling time. That settling figure — 5 ns to within 1/2 LSB — sets the update rate ceiling: with a parallel interface, the data bus must present a new word and hold it long enough for the internal current switches to settle before the next strobe. For a multiplying DAC, the reference input can be modulated at speed, so the 5 ns spec governs both the digital word update and the analog reference bandwidth.
Military temperature grade and hermetic package
Rated for -55°C to 125°C operating temperature, the AD9768SE spans the full military temperature band. The 20-CLCC package (ceramic leadless chip carrier) with a 9x9 mm 20-LCCC footprint provides a hermetic seal — moisture ingress is blocked, so the die sees no humidity-driven corrosion or parametric drift over decades of storage or cycling. This combination targets avionics, satellite payloads, and downhole instrumentation where the board must survive thermal shock and vacuum without outgassing. The multiplying DAC architecture accepts an external reference — the reference input doubles as a second signal input, so the output is the product of the digital code and the analog reference voltage. With no differential output, the single-ended current output drives into a transimpedance amplifier or directly into a summing node. The parallel data interface writes all 8 bits simultaneously, which is the fastest way to load a new code when the bus width matches.
Active lifecycle and compliance posture
Note that the RoHS compliance status is listed as non-compliant, which is expected for a hermetic ceramic package containing lead-based solder seals; this part is exempt from RoHS restrictions for military/aerospace applications under the exemption for high-reliability solders.