Temperature sensors

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Switzerland – Global semiconductor manufacturer STMicroelectronics recently introduced its new precision temperature sensor that requires supply current of less than 4.3µA and comes in a four-lead UDFN package.

ST claims that the STLM20 temperature sensor is the lowest-current drop-in alternative to industry-standard LM20 devices, making it suitable for 3G mobile phones and other battery-operated products that require low power, compact size, and high levels of accuracy and linearity over full temperature range.

The sensor operates within the -55°C to 130°C range and functions from a supply voltage of 2.4V to 5V. The device's temperature-to-voltage accuracy is ±1.5°C at 25°C, and ±2.5°C over the whole operating temperature range. The sensors are available in either 1x1.3x0.5mm four-lead UDFN package or in five-lead SOT323 package.

The new product's other applications include monitoring transmitter power amplifiers, temperature-compensated crystal oscillators, battery chargers, GPS devices and medical instruments.