Wide-voltage-range, low-power temperature sensors

November 21, 2014 // By Graham Prophet
Atmel has a family of high-precision digital temperature sensors with the widest Vcc range from 1.7V to 5.5V. The new family delivers higher temperature accuracy and faster I²C bus communication speeds, and are available with integrated nonvolatile registers and serial EEPROM memory for consumer, industrial, computer, and medical applications.

Inventory of one device covers all Vcc requirements in a variety of applications. Currently, Atmel says, digital temperature sensors on the market are available with a very limited Vcc range requiring users to purchase multiple temperature sensors. The new family also delivers a higher accuracy rate at ±0.5°C accuracy (typical) across the 0°C to +85°C temperature range, across the entire wide voltage range (1.7V to 5.5V). The low voltage operation of the devices also reduce the overall power consumption.

The new family also delivers a faster I²C bus communication with speeds of up to 1 MHz, increasing the data throughput for both temperature sensor operations and for devices with integrated Serial EEPROM.

The sensor family includes six high-precision, digital temperature sensors based on the industry-standard LM75 functionality offered by a number of vendors. All the devices accurately measure and monitor temperature to address the thermal monitoring requirements for a wide variety of applications and are highly configurable. They include devices with serial EEPROM memory from 2k-, 4k- or 8k-bits to store system parameters and user preference data. The base part numbers include AT30TSE752A, AT30TSE754A or AT30TSE758A. The user can also access the EEPROM, which is fully functional and drop-in compatible with industry-standard I²C serial EEPROMs. This integration reduces overall system cost by replacing the stand-alone serial EEPROM. The integrated nonvolatile register feature allows user-configured settings to be retained across power cycles.

The new temperature sensor family includes the AT30TS74, AT30TS75A, AT30TS750A, AT30TSE752A, AT30TSE754A, and the AT30TSE758A and replaces the existing AT30TS75, AT30TS750, AT30TSE752, AT30TSE754, and the AT30TSE758 devices.Pricing starts at $0.32 for the AT30TS74 (5,000).

Atmel; www.atmel.com/products/tempsensors/