12-Bit + Sign Temperature Sensor with SPI-Compatible Serial Interface

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° resolution. The temperature data is readable at any time through the serial interface. The operating temperature range is -55° to +150°.

The MAX6662 provides two programmable watchdog interrupt outputs. Active-Low ALERT is used for lower temperature warning functions, while active-low 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.

Applications

* HVAC * Refrigeration * Test Equipment

* 12-Bit + Sign, 0.0625°C Resolution

* Accuracy

* ±1°C max (+30°C to +50°C)

* ±1.6°C max (0°C to +70°C)

* ±2.5°C max (-20°C to +85°C)

* ±2.5 typ (+150°C)

* Extended Temperature Measurement Range

* -55°C to +150°C

* Low Average Supply Current, 125µA (typ)

* Shutdown Mode to Minimize Power Consumption in Portable Applications

* Two Programmable Temperature Fault Outputs

* Switchable Fault Queue to Eliminate False Tripping in Noisy Environments