The MAX6690MEE+ from Analog Devices (formerly Maxim Integrated) is a digital temperature sensor that monitors both its own die temperature and one external diode-connected transistor. It resolves temperature to 10-bit resolution and communicates over an I²C/SMBus interface, making it a straightforward add to any digital bus. Supply voltage spans 3V to 5.5V, so it runs off a 3.3V or 5V rail without a separate regulator. Accuracy is rated at ±2.5°C typical and ±5°C maximum over the full temperature range — adequate for board-level thermal management, fan control, and system protection where you need to know a temperature is drifting, not measure it to a tenth of a degree.
Built-in features that save firmware cycles
The MAX6690MEE+ includes a One-Shot mode for on-demand conversions without continuous polling, a programmable temperature limit with an open-drain output switch that can assert an interrupt or trigger a fan, and a Standby Mode that drops power consumption when the system is idle. These features reduce the host microcontroller's overhead — the sensor can flag an overtemperature event without being polled.
Housed in a 16-pin SSOP (0.154" body width, 3.90 mm) and also specified as the 16-QSOP supplier device package. Surface-mount, fine-pitch — standard for a small mixed-signal IC. The tube shipping medium is fine for prototype builds; production volumes typically come on tape and reel.