Digital temperature sensor and thermal watchdog

The STTS75 is a high-precision CMOS (digital) temperature sensor IC with a delta-sigma analog-to-digital (ADC) converter and an I2C-compatible serial digital interface. It is targeted for general applications such as personal computers, system thermal management, electronics equipment, and industrial controllers, and is packaged in the industry standard 8-lead MSOP(TSSOP) and SO8 packages.

The device contains a band gap temperature sensor and programmable 9- to 12-bit ADC which monitor and digitize the temperature to a resolution up to 0.0625 °C. The STTS75 is typically accurate to (±3 °C - max) over the full temperature measurement range of –55 °C to 125 °C with ±2 °C accuracy in the –25 °C to +100 °C range. At power-up, the STTS75 defaults to 9-bit resolution for software compatibility with the STLM75.

The STTS75 is specified for operating at supply voltages from 2.7 V to 5.5 V. Operating at 3.3 V, the supply current is typically (75 μA).

The onboard delta-sigma analog-to-digital converter (ADC) converts the measured temperature to a digital value that is calibrated in °C; for Fahrenheit applications a lookup table or conversion routine is required.

The STTS75 is factory-calibrated and requires no external components to measure temperature.

Key Features

  • Measures temperatures from –55 °C to +125 °C (–67 °F to +257 °F)
    • ±0.5 °C (typ) accuracy
    • ±2 °C (max) accuracy from –25 °C to +100 °C
  • Low operating current: 75 μA (typ)
  • No external components required
  • 2-wire I2 C/SMBus-compatible serial interface
    • Selectable serial bus address allows connection of up to eight devices on the same bus
  • Thermometer resolution is user-configurable from 9 (default) to 12 bits (0.5 °C to 0.0625 °C)
  • 9-bit conversion time is 45 ms (typ)
  • Programmable temperature threshold and hysteresis set points
  • Wide power supply range-operating voltage range: 2.7 V to 5.5 V
  • Power saving one-shot temperature measurement
  • Power-up defaults permit standalone operation as thermostat
  • Shutdown mode to minimize power consumption
  • Separate open drain output pin operates as an interrupt or comparator/thermostat output (dual purpose event pin)
  • Packages:
    • SO8
    • MSOP8 (TSSOP8)

Circuit Diagram

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Resources

Technical Documentation

Product Specifications
Description Version Size
Digital temperature sensor and thermal watchdog 11.1 664 KB

Publications and Collaterals

Flyers
Description Version Size
STTS75 2.2 706 KB
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Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STTS75DS2F MSOP/TSSOP 8 Tape And Reel -55 125 Active - - NEC EAR99 MALAYSIA MORE INFO DISTRIBUTOR AVAILABILITY
STTS75M2F SO-8 Tape And Reel -55 125 Active - - NEC EAR99 MOROCCO MORE INFO DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STTS75DS2F ActiveMSOP/TSSOP 8IndustrialEcopack2 0 0
STTS75M2F ActiveSO-8IndustrialEcopack1 (*) 0 0
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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