ADT6503

Data Sheet Low Cost, 2.7 V to 5.5 V, Micropower Temperature Switches in SOT-23 ADT6501/ADT6502/ADT6503/ADT6504 FEATURES ±0.5°C (typical) threshold accuracy Factory-set trip points from −45°C to +15°C in 10°C increments +35°C to +115°C in 10°C increments No external components required Maximum temperature of 125°C Open-drain output (ADT6501/ADT6503) Push-pull output (ADT6502/ADT6504) Pin-selectable hysteresis of 2°C and 10°C Supply current of 30 µA (typical) Space-saving, 5-lead SOT-23 package APPLICATIONS Medical equipment Automotive Cell phones Hard disk drives Personal computers Electronic test equipment Domestic appliances Process control GENERAL DESCRIPTION The ADT6501/ADT6502/ADT6503/ADT6504 are trip point temperature switches available in a 5-lead SOT-23 package. Each part contains an internal band gap temperature sensor for local temperature sensing. When the temperature crosses the trip point setting, the logic output is activated. The ADT6501/ ADT6503 logic output is active low and open-drain. The ADT6502/ADT6504 logic output is active high and push-pull. The temperature is digitized to a resolution of 0.125°C (11-bit). The factory trip point settings are 10°C apart starting from −45°C to +15°C for the cold threshold models and from +35°C to +115°C for the hot threshold models. These devices require no external components and typically consume 30 μA supply current. Hysteresis is pin-selectable at 2°C and 10°C. The temperature switch is specified to operate over the...