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.

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 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 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

Download

Resources

Technical Documentation

Product Specifications

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

Application Notes

	Description	Version	Size
	AN2680: Fan speed controller based on STDS75 or STLM75 digital temperature sensor and ST72651AR6 MCU	1.4	125 KB

Publications and Collaterals

Flyers

	Description	Version	Size
	STTS75	2.2	706 KB

Tools and Software

Embedded Software

MCUs Embedded Software

Part Number	Manufacturer	Description
STSW-ST7055	ST	Fan speed controller based on STDS75 or STLM75 digital temperature sensor and ST72651AR6 MCU

Sample & Buy

Part Number	Package	Packing Type	Operating Temperature (°C) (min)	Operating Temperature (°C) (max)	Marketing Status	Unit Price (US$) *	Quantity	ECCN (US)	Country of Origin	More info	Order from ST	Order from Distributors
STDS75DS2F	MSOP/TSSOP 8	Tape And Reel	-55	125	Active : Product is in volume production	1.15	-	EAR99	MALAYSIA	MORE INFO	Buy Direct Add to cart	DISTRIBUTOR AVAILABILITY

(*) 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	RoHS Compliance Grade	Material Declaration**
STDS75DS2F	Active	MSOP/TSSOP 8	Ecopack2

(**) 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.