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STDS75

Digital temperature sensor and thermal watchdog
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The STDS75 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 TSSOP package.

The device contains a bandgap temperature sensor and programmable 9- to 12-bit ADC which monitor and digitize the temperature to a resolution up to 0.0625 °C. The STDS75 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 STDS75 defaults to 9-bit resolution for software compatibility with the STLM75.

The STDS75 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 (125 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 STDS75 is factory-calibrated and requires no external components to measure temperature.

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Errata Sheet
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Datasheet

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: 125 μA (typ)
  • No external components required
  • 2-wire I2C/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 150 ms (max)
  • Programmable temperature threshold and hysteresis set points
  • Wide power supply range - operating voltage range: 2.7 V to 5.5 V
  • Pin- and software-compatible with DS75 (drop-in replacement)
  • 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)
  • MSOP8 (TSSOP8) package

Circuit Diagram

Design Resources

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Technical Documentation

Product Specifications

Description Version Size
pdf
DS5156: Digital temperature sensor and thermal watchdog
9.0 600 KB

Application Notes

Description Version Size
pdf
AN2680: Fan speed controller based on STDS75 or STLM75 digital temperature sensor and ST72651AR6 MCU
1.4 126 KB

User Manual

Description Version Size
pdf
UM0452: Temperature sensor evaluation board
1.3 1,155 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STEVAL-IFS017V1 Multiple-device temperature sensor and RTC demonstration board based on the STM32
STSW-ST7055 Fan speed controller based on STDS75 or STLM75 digital temperature sensor and ST72651AR6 MCU

Publications and Collaterals

Flyer

Description Version Size
pdf
STTS75
1.0 707 KB

Sample & Buy

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Part Number Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
@
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STDS75DS2FActiveMSOP/TSSOP 8Tape And Reel-55125_-Distributor reported inventory date: 2014-12-22
Distributor NameRegionStockMin. order
RS COMPONENTSOrder NowEUROPE6455
DIGIKEYOrder NowWORLDWIDE21211
FUTUREOrder NowWORLDWIDE10001000
MOUSEROrder NowWORLDWIDE14871
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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
(**) 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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