The MAX6662 is a 12-bit + sign temperature sensor combined with a programmable overtemperature alarm and a 3-wire (SPI-compatible) serial interface in a single package. It converts its die temperature into digital values using an internal analog-to-digital converter (ADC). The temperature data is stored in a temperature register as a 13-bit word, which allows 0.0625°C resolution. The temperature data is readable at any time through the serial interface. The operating temperature range is -55°C to +150°C. The MAX6662 provides two programmable watchdog interrupt outputs. ALERT is used for lower temperature warning functions, while OT is used for higher temperature-critical functions, such as power-supply shutdown. The MAX6662 features a shutdown mode that saves power by disabling everything except the serial interface. The temperature sensor is available in an 8-pin SO package.
The MAX6662 is a 12‑bit signed temperature sensor that provides 0.0625 °C resolution and programmable over‑temperature alarms. It operates over a temperature range of –55 °C to +150 °C and is supplied in an 8‑pin SO package. Features include low average supply current, shutdown mode, and two programmable fault outputs (ALERT and OT).
The device uses a SPI‑compatible three‑wire serial interface (CS, SCLK, SIO) with a fixed 24‑clock‑cycle transaction. It contains six registers (Temperature, Configuration, THyst, Tmax, TLow, THIGH) that can be read or written to configure limits, polarity, and shutdown. Detailed timing diagrams, command codes, and pin descriptions are provided for integration into HVAC, automotive, and test equipment applications.
| Resolution | 0.0625 °C |
|---|---|
| Accuracy | +1 °C max (430 °C to +50 °C) |
| Operating Temperature Range | -55 °C to +150 °C |
| Supply Voltage Range | 3.0 V to 5.5 V |
| Average Operating Current | 125 µA (typ) |
| Serial Clock Frequency | 25 MHz |
| Package | 8‑pin SO |
The sensor provides a resolution of 0.0625 °C per LSB.
It is supplied in an 8‑pin SO package.
The device operates from 3.0 V to 5.5 V.
ALERT is an open‑drain active‑low output (default) that can be programmed for active‑high, and operates in either comparator or interrupt mode.