Functional Breakdown of Low-Power Industrial-Grade Temperature Sensor Chip

  ^{September 1, 2025 — Driven by the growing demand for high-precision temperature monitoring, the digital temperature sensor TMP117AIDRVR is emerging as an ideal solution for medical devices, industrial automation, and consumer electronics, thanks to its exceptional measurement accuracy and ultra-low power consumption. According to the technical datasheet (datasheet number SBOS901) provided by Mouser Electronics, the chip utilizes advanced CMOS integrated circuit technology, supports a wide temperature measurement range from -55°C to +150°C, and achieves a high accuracy of ±0.1°C (from -20°C to +50°C), providing reliable sensing support for various high-precision temperature monitoring applications.}

^{The TMP117AIDRVR comes in a 6-pin WSON package, measuring only 1.5mm × 1.5mm with a height of 0.5mm. According to the Mouser Electronics datasheet, the chip integrates a 16-bit high-precision Σ-Δ ADC converter, achieving a temperature resolution of 0.0078°C. It features built-in non-volatile memory (EEPROM) to store user settings for eight configuration registers. With an operating voltage range of 1.8V to 5.5V, it is compatible with various power supply systems. The digital interface supports the I2C protocol with a maximum data transfer rate of 400kHz.}

^{1.The TMP117AIDRVR comes in a compact 6-pin WSON package, with each pin precisely and practically designed for specific functions. The VDD pin serves as the positive power supply input, supporting a wide operating voltage range from 8V to 5.5V, and requires an external 0.1μF ceramic decoupling capacitor for stable operation. The GND pin is the ground connection, which should be thoroughly connected to the PCB ground plane to ensure measurement stability.}

^{2.Supports connecting up to 3 chips on the same bus to meet multi-point monitoring requirements; the INT pin serves as an interrupt output, asserting low when new measurement data is available or temperature exceeds preset thresholds, providing immediate anomaly feedback to the host controller. The overall pin design balances stability, flexibility, and practicality, adapting to temperature monitoring scenarios across diverse electronic systems.}

^{The TMP117 is a digital output temperature sensor designed for thermal-management and thermal-protection applications. The TMP117 is two-wire, SMBus, and I2C interface-compatible. The device is specified over an ambient air operating temperature range of –55 °C to 150 °C.}

• ^{PCB Layout and Thermal Management: To achieve the highest measurement accuracy, PCB layout and thermal design are critical. The TMP117AIDRVR should be placed away from heat-generating components (such as CPUs, power inductors, and power management ICs), and as close as possible to the target temperature measurement point. Proper copper pour and the addition of thermal vias help minimize errors caused by self-heating or environmental thermal gradients.}
• ^{Power Supply Decoupling: A 0.1μF ceramic decoupling capacitor should be placed close to the V+ and GND pins of the chip to ensure stable power supply and suppress noise interference.}
• ^{I2C Bus: Pull-up resistors (e.g., 4.7kΩ) are typically required on the SDA and SCL lines to the logic supply voltage to ensure reliable communication.}

^{1.The sensor supports multiple operational modes:
2.High-Precision Measurement Mode: ±0.1℃ accuracy at 25℃, ±0.5℃ full range (-40℃ to 125℃)
3.Programmable Resolution Mode: Switchable 12-bit to 16-bit ADC for precision/ speed balance
4.Low-Power Mode: 7.5μA active current, 0.1μA shutdown current for battery devices
5.Alarm Mode: Configurable high/low temperature thresholds, INT pin triggers alert
6.Multi-Device Mode: 3 programmable I²C addresses (0x48/0x49/0x4A) for bus expansion}

^{1.The TMP117AIDRVR supports multiple device function modes:
2.High-Accuracy Temperature Sensing Mode: ±0.1℃ precision at 25℃, ±0.5℃ over -40℃~125℃ range, 16-bit ADC for stable data
3.Programmable Measurement Rate Mode: 0.125Hz~8Hz adjustable rate, balancing response speed and power consumption
4.Ultra-Low Power Mode: 7.5μA active current, 0.1μA shutdown current, 适配 battery-powered devices}

^{5.Threshold Alarm Mode: Configurable high/low temp thresholds, INT pin outputs alert signal when exceeded
6.Multi-Sensor Bus Mode: 3 programmable I²C addresses (0x48/0x49/0x4A), enabling multi-device parallel monitoring}

^{Design Requirements}

^{The TMP117 operates only as a slave device and communicates with the host through the I2C-compatible serial interface. SCL is the input pin, SDA is a bidirectional pin, and ALERT is the output. The TMP117 requires a pullup resistor on the SDA, and ALERT pins. The recommended value for the pullup resistors is 5 kΩ. In some applications, the pullup resistor can be lower or higher than 5 kΩ. A 0.1-µF bypass capacitor is recommended to be connected between V+ and GND. An SCL pullup resistor is required if the system microprocessor SCL pin is open-drain. Use a ceramic capacitor type with a temperature rating that matches the operating range of the application, and place the capacitor as close as possible to the V+ pin of the TMP117. The ADD0 pin can be connected directly to GND, V+, SDA and SCL for address selection of four possible unique slave ID addresses. Table 7-1 explains the addressing scheme. The ALERT output pin can be connected to a microcontroller interrupt that triggers an event that occurred when the temperature limit exceeds the programmable value in registers 02h and 03h. The ALERT pin can be left floating or connected to ground when not in use.}

^{Key considerations for typical application circuits:}

^{1.Each PVDD pin requires a 10μF ceramic decoupling capacitor}

^{2.Bootstrap capacitors: Recommended 100nF/50V X7R dielectric}

^{3.Overcurrent threshold set by external resistor on OC_ADJ pin}

^{4.Thermal pad must have good contact with PCB, recommended to use thermal via array}

^{5.Signal ground and power ground connected in star topology}

Contact our trade specialist:

--------------

^{Email: xcdzic@163.com}

^{WhatsApp: +86-134-3443-7778
Visit the ECER product page for details: [链接]}