DS1721U+

DS1721U+ is a 2-wire digital thermometer and thermostat. It provides 12-bit temperature readings, which indicate the temperature of the device. Thermostatic settings and temperature readings are all communicated to/from the DS1721 over a simple 2-wire serial interface. No additional components are required; the device is truly a “temperature-to-digital” converter. The DS1721 has three address bits that allow a user to multidrop up to eight sensors along the 2-wire bus, greatly simplifying the bussing of distributed temperature sensing networks. The thermal alarm output, TOUT, is active when the temperature of the device exceeds a user-defined temperature TH. The output remains active until the temperature is equal to or below the user-defined temperature TL, allowing for any hysteresis necessary. Applications for DS1721 include personal computers/services, cellular telephones, office equipment, or any microprocessor-based, thermally sensitive system.

• Temperature measurements require no external components with ±1°C accuracy
• Temperature resolution is configurable from 9 to 12 (default) bits (0.5°C to 0.0625°C resolution)
• Maximum conversion time (9-bit resolution) of 93.75 ms
• Thermostatic settings are user-definable
• Data is read/written via a 2-wire serial interface (open drain I/O lines); 3-bit addressability
• Wide power supply range (2.7V - 5.5V)
• Standby current is 0.8µA max at -55°C to +125°C; 2.7V ≤ VDD ≤ 5.5V
• 8-pin uSOP package
• Measures temperatures from -55°C to +125°C

Warnings

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party