Reduced-size humidity sensor aims at wearables
The SHTW1 is similar to Sensirion’s established SHTC1 humidity sensor but in a smaller package. The SHTW1 measures 1.3mm by 0.7mm by 0.5mm and operates at 1.8V with a power consumption of 2-microwatts when delivering one measurement per second. Sensirion states that the sensor, one of the first to use wafer-level chip-scale packaging, is suitable for use in the wearable and mobile equipment markets.
The SHTW1 is based on the CMOSens technology, which integrates the sensor component and the signal evaluation circuit on the same silicon chip.
The unit measures relative humidity across a range of 0 to 100 percent RH, with a typical accuracy of +/-3 percent RH. The temperature measurement ranges from -30 °C to 100 degrees C with a typical accuracy of +/- 0.3 degrees C. The completely calibrated sensor features an I2C interface and is reflow solderable.
These are the same specifications as the SHTC1, which comes in a package measuring 2mm by 2mm by 08mm.
Sensirion will present the reduced-size SHTW1 sensor at the Mobile World Congress, which takes place in Barcelona from February 24 to 27.
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