DS1621S+

DS1621S+ is a digital thermometer and thermostat. It provides 9-bit temperature readings, which indicate the temperature of the device. 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 drops below the user-defined temperature TL, allowing for any hysteresis necessary. User-defined temperature settings are stored in non-volatile memory so parts may be programmed prior to insertion in a system. Temperature settings and temperature readings are all communicated to/from the device over a simple 2-wire serial interface. It is used in applications such as thermostatic controls, industrial systems, consumer products, and thermometers.

• Supply voltage range from 2.7V to 5.5V
• Thermometer error is ±2°C maximum at (-55°C to +125°C; VDD = 2.7V to 5.5V)
• Active current is 1000µA typical at (-55°C to +125°C; VDD = 3.0V to 5.5V)
• I/O capacitance is 10pF maximum at (-55°C to +125°C; VDD = 3.0V to 5.5V)
• Thermometer resolution is 12-bits
• Thermostatic settings are user definable and non-volatile
• Data is read from/written via a 2-wire serial interface (open drain I/O lines)
• Temperature measurements require no external components
• Converts temperature to digital word in less than 1s
• Operating temperature range from -55°C to +125°C, SOIC package

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