STTS75DS2F STMicroelectronics, STTS75DS2F Datasheet - Page 6

• Manufacturer Part Number: STTS75DS2F
• Description: IC TEMP SENSOR DGTL WCHDG 8MSOP
• Manufacturer: STMicroelectronics

Specifications of STTS75DS2F

• Function: Temp Sensor, Watchdog
• Topology: ADC (Sigma Delta), Comparator, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Full Temp Accuracy: +/- 3 C
• Digital Output - Bus Interface: Serial (2-Wire, I2C)
• Digital Output - Number Of Bits: 12 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• For Use With: 497-8844 - EVAL DAUGHTER STTS75 8-TSSOP497-8419 - BOARD ST72651AR6/STTS75/STLM20
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6331-2

Description
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1.1
1.2
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Description
The STTS75 is a high-precision CMOS (digital) temperature sensor IC with a delta-sigma
analog-to-digital (ADC) converter and an I
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.
Serial communications
The STTS75 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 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 STTS75 registers to
customize operation of the device.
Temperature sensor output
The STTS75 temperature sensor has a dedicated open drain overlimit signal/alert
(OS/INT/Alert) output which features a thermal alarm function. This function provides a
user-programmable trip and turn-off temperature. It can operate in either of two selectable
modes:
●
●
At power-up the STTS75 comes up in 9-bit mode and immediately begins measuring the
temperature and converting the temperature to a digital value. The resolution of the digital
output data is user-configurable to 9, 10, 11, or 12 bits which correspond to temperature
increments of 0.5 °C, 0.25 °C, 0.125 °C, and 0.0625 °C, respectively.
Section 2.3: Comparator
Section 2.4: Interrupt
mode.
Doc ID 13298 Rev 11
mode, and
2
C-compatible digital serial interface which allows the
2
C-compatible serial digital interface. It is targeted
STTS75