The temperature sensor IC from Seiko Technology has been developed using CMOS technology and typically consumes an operating current of 50 µA. The S-5855A IC alters a frequency’s duty cycle according to ambient temperature. The duty cycle is also preset with a capacitor.
The temperature at which the sensor IC begins to modulate the output signal is determined during the time of order. It may be chosen between 40°C and 80°C in increments of 10°C. The IC’s temperature sensitivities that need to be calculated during the time of order are -4%/°C, -3%/°C, -2%/°C and -1%/°C.
The sensor IC is particularly suitable for computer LCD monitors and flat television sets. It is also suitable for an array of applications that require shielding against overheating. The IC reduces the heating power by decreasing the energy supply’s duty cycle. It is also used in applications where lamps or any other lighting equipment are manufactured using LEDs.
The IC, available in SOT-23-5 and SNT-4A packages, has N-channel open drain and CMOS as output form. The packages also facilitate high-density mounting.
Source: http://www.seiko-instruments.de/