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Temperature Switch Achieves High Accuracy

Wed, 06/02/2010 - 10:41am
Seiko S-5843ASeiko Instruments announced the availability of their S-5843A Series temperature switch IC which detects temperature with a temperature accuracy of ±2.5ºC. The output inverts when temperature reaches the detection temperature. This IC restores the output voltage when the temperature drops to the level of release temperature. The S-5843A Series operates at the lower power supply voltage of 1.65 V and its current consumption is 4.5 ?A typ. due to CMOS configuration. A temperature sensor with the negative temperature coefficient, a reference voltage generation circuit, a comparator and a delay circuit are all integrated on one chip, and enclosed into the small packages SNT-6A and SOT-23-5.

Product features include:
• Detection temperature: +40°C to +120°C, +1°C step, detection accuracy: ±2.5°C
• Low voltage operation: VDD (min.) = 1.65 V
• Low current consumption: 4.5 °A typ. (Ta = +25°C)
• Hysteresis temperature: selectable in 2°C, 4°C, 10°C or 20°C
• Selectable output logic in active “H” or “L”
• Selectable output form in CMOS or Nch open drain
• Prevent functions for false detection operation and false release operation
• Small packages: SNT-6A, SOT-23-5
• Lead-free product

Typical applications include:
• Fan control
• Air conditioning system
• Mobile phones
• Game consoles
• Various electronic devices

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