Description:Board Mount Temperature Sensors Automotive grade, ultra-small, dual-channel, 0.5- A, resistor-programmable temperature switch 6-SOT-5X3 -55 to 130
TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,DUAL TRIP POINT
Supply Voltage-Max:
5.5 V
Supply Voltage-Min:
1.62 V
Surface Mount:
YES
Terminal Finish:
Nickel/Palladium/Gold (Ni/Pd/Au)
Termination Type:
SOLDER
TMP390AQDRLTQ1 Frequently Asked Questions (FAQs)
Texas Instruments provides a recommended PCB layout in the TMP390 application note (SLUAAC4) that includes guidelines for thermal vias, copper pours, and component placement to ensure optimal thermal performance.
The TMP390 has a built-in calibration mechanism that can be accessed through the I2C interface. The calibration process involves writing specific values to the device's registers to compensate for offset and gain errors. Refer to the TMP390 datasheet and application note (SLUAAC4) for detailed calibration procedures.
The maximum cable length for the I2C interface depends on the clock frequency, cable capacitance, and noise environment. As a general guideline, keep the cable length below 1 meter for a 400 kHz clock frequency. To ensure signal integrity, use twisted-pair cables, add pull-up resistors, and consider using I2C bus repeaters or buffers for longer cable lengths.
To handle thermal shock and vibration, ensure that the TMP390 is properly mounted and secured to the PCB using a suitable thermal interface material (TIM). Use a robust PCB design with adequate mechanical support, and consider adding mechanical stress relief features such as thermal pads or heat sinks.
The recommended power-up sequence for the TMP390 is to apply VCC first, followed by the I2C clock signal. When powering down, ensure that the I2C clock signal is stopped before removing VCC. The TMP390 has a low-power shutdown mode that can be controlled through the I2C interface; refer to the datasheet for details on power-down modes and power consumption.
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TMP390AQDRLTQ1 Overview
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
