Low-Voltage, ±0.5°C Accuracy Digital Thermometer and Thermostat

First Digital, Temperature Sensor to Operate Down to 1.7V

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The DS620 digital thermometer and thermostat provides low-voltage (1.7V < VDD < 3.5V) temperature measurements with ±0.5°C accuracy from 0°C to +70°C and an operating temperature range of -55°C to +125°C. The DS620 communicates over a 2-wire digital interface. For distributed-sensing applications, it is multidroppable with three address pins that allow up to eight DS620s to operate on a single bus.

The DS620 has thermostat functionality with userdefined thresholds stored in EEPROM registers, and it can be configured for standalone thermostat operation. The programmable output (PO) pin serves as the thermostat output, and this pin can also be configured to function as an active-low control for peripheral devices.

DS620: Typical Operating Circuit DS620: Typical Operating Circuit Enlarge+

Key Features

  • Low-Voltage Operation: 1.7V to 3.5V
  • ±0.5°C Accuracy from 0°C to +70°C
  • Operating Temperature Range: -55°C to +125°C (-67°F to +257°F)
  • Temperature Measurements Require No External Components
  • Resolution is User-Selectable to 10-, 11-, 12-, or 13-Bits (0.5°C, 0.25°C, 0.125°C, and 0.0625°C LSb Weight, Respectively)
  • Multidroppable
  • Fast (200ms max) Temperature-to-Digital Conversion Time
  • Thermostatic Settings are User-Definable and Nonvolatile
  • Standalone Thermostat Capability
  • Data is Read/Written Through a 2-Wire Serial Interface
  • Package: 8-Pin µSOP


  • Computers/Servers
  • Industrial
  • Low-Voltage Temperature-Sensitive Applications
  • Medical Instruments
  • Portable Applications
  • Test Equipment

See parametric specs for Temperature Sensors (113)

Part NumberSensor TypeFunctionsInterfaceChannelsAccuracy
Parasite Pwr.Temp. Thresh.Temp. Resolution
Multi DroppableOper. Temp.
See Notes
DS620 LocalStandalone Thermostat2-Wire/I2C/SMBusOne0.5NoProgrammable (NV)
Yes-55 to +125
$1.93 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Product Reliability Reports: DS620.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


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