stcn75 STMicroelectronics, stcn75 Datasheet - Page 6

• Manufacturer Part Number: stcn75
• Description: Digital Temperature Sensor And Thermal Watchdog
• Manufacturer: STMicroelectronics

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Summary description
The STCN75 is a high-precision digital CMOS temperature sensor IC with a sigma-delta
temperature-to-digital converter and an I
on page
thermal management, electronics equipment, and industrial controllers, and is packaged in
the industry standard 8-lead TSSOP and SO8N packages.
The device contains a band gap 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.
STCN75 is specified for operating at supply voltages from 2.7V to 5.5V. Operating at 3.3V,
the supply current is typically (125µA).
The on-board 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.
Serial communications
The STCN75 has a simple 2-wire I
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 400kHz. 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.
7). It is targeted for general applications such as personal computers, system
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C-compatible digital serial interface which allows the
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C-compatible serial digital interface (see
Figure 1