STCN75DS2F View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STCN75DS2F

Digital temperature sensor and thermal watchdog

STMicroelectronics 

Description

1

Description

STCN75

The STCN75 is a high-precision digital CMOS temperature sensor IC with a sigma-delta

temperature-to-digital 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 9-bit ADC which monitor and

digitize the temperature to a resolution up to 0.5 °C. The STCN75 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. The STCN75 is pin-for-pin and software

compatible with the TCN75.

The STCN75 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 sigma-delta analog-to-digital converter (ADC) converts the measured

temperature to a digital value that is calibrated in degrees centigrade; for Fahrenheit

applications a lookup table or conversion routine is required.

The STCN75 is factory-calibrated and requires no external components to measure

temperature.

1.1

Serial communications

The STCN75 has a simple 2-wire I2C-compatible digital serial interface which allows the

user to access the data in the temperature register at any time. It communicates via the

serial interface with a master controller which operates at speeds up to 400 kHz. Three pins

(A0, A1, and A2) are available for address selection, and enable the user to connect up to 8

devices on the same bus without address conflict.

In addition, the serial interface gives the user easy access to all STCN75 registers to

customize operation of the device.

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Doc ID 13307 Rev 9

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