What it is: a dual 8-bit DAC on an I²C bus
The Maxim Integrated MAX518AESA+ is an 8-bit digital-to-analog converter with two voltage-buffered outputs, controlled over an I²C serial interface. It comes in a standard 8-pin SOIC package and operates from a single 5V supply for both analog and digital rails. Typical settling time is 6 µs, making it suitable for closed-loop control adjustments, set-point generation, or trimming applications where a single-supply, moderate-speed DAC is needed. The dual channel reduces BOM count when two analog outputs are required on a shared bus.
Where it fits — typical applications and environments
This DAC is a natural fit for industrial control modules, programmable logic controllers, and test equipment that need a few analog outputs for trimming, calibration, or supervisory set-points. The I²C interface keeps the wiring simple — two bus lines plus the reference and output — so it integrates easily into mixed-signal boards with a microcontroller. The industrial temperature range and 5V-only supply suit it for factory-floor sensor transmitters, motor drive bias circuits, and building-automation controllers. It is not a high-resolution or high-speed part; the 8-bit resolution and 6 µs settling target the adjustment and monitoring role, not precision audio or high-frequency arbitrary waveform generation.
Lifecycle and sourcing reality
For a BOM line that needs a dual 8-bit I²C DAC, this is a current, non-obsolescent choice. No direct pin-compatible second source is listed in the official records.