Fan controller with integrated sigma-delta ADC
The Microchip EMC2103-4-AP-TR combines fan control and temperature monitoring in a single 16-QFN package, integrating a sigma-delta ADC, multiplexer, and register bank on-chip. It reads temperature from both an internal sensor and an external diode-connected transistor, reporting values with ±2°C accuracy over the measurement range.
What ±2°C accuracy buys in a thermal management loop
The ±2°C accuracy means the controller can trigger a fan-speed change or an overtemperature alarm within a tight thermal window — important when a 3°C margin separates normal operation from a derating event or system shutdown. The on-chip sigma-delta ADC converts the temperature reading into a digital word that the SMBus interface transmits to the host; the register bank holds the limit thresholds and fan-control parameters locally, so the host does not have to poll continuously.
16-QFN package and 3.3V supply rail
It runs from a single 3.3V supply, which is common in server, telecom, and industrial control backplanes where the fan tachometer and SMBus already share that rail.
Active lifecycle and compliance baseline
It is offered in both Tape & Reel for automated pick-and-place and Cut Tape for prototype or low-volume builds.