Norwood, Mass. Analog Devices Inc. unveiled a complete digital temperature monitoring IC, which includes an on-chip temperature sensor that comes in two performance grades.
The B-grade accurately measures ambient temperature to ±1.0°C maximum within the range of 0° C to +70°C, and the A-grade is accurate to ±2.0°C over a wider range. Both grades communicate using a I²C compatible digital bus.
The ADT75 digital temperature sensor consists of a band gap temperature sensor and 12-bit analog-to-digital converter (A/D converter) to monitor and digitize the temperature to a resolution of 0.0625°C.
The ADT75 is specified for operation at supply voltages from 3 V to 5.5 V. Power consumption is typically 69 μW at 3.3 V. Operating at 3.3 V, the supply current is typically 300 μA. The ADT75 offers a shutdown mode that powers down the device and gives a shutdown current of 3 μA typically. Three pins (A0, A1 and A2) are available for address selection. There is also an open-drain OS/ALERT output that becomes active when temperature exceeds a programmable limit. This pin can operate in either comparator or interrupt mode.
Typical applications for the ADT75 include isolated sensors, environmental control systems, computer thermal monitoring, thermal protection, industrial process control, power-system monitors, and hand-held applications.
The device is offered in an 8-lead MSOP or 8-lead SOIC. Available now, pricing for the ADT75 starts at 65 cents each in 1,000-piece quantities.Click here for the ADT75 data sheet.
Analog Devices , 1-800-262-5643, www.Analog.com.