The SGM446 is a 2-terminal temperature sensor with an output current proportional to absolute temperature. It can be considered as a constant-current and high-impedance regulator passing 1μA/K in the supply voltage range from 4V to 35V. The SGM446 is calibrated to 298.2μA output current at 298.2K (+25℃).
Compared with the traditional electrical temperature sensor, the SGM446 does not need resistance measurement circuit, linearization circuit, precision voltage amplifier and cold junction compensation. It also integrates the compensation of temperature, flow rate measurement, discrete-component correlation, biasing proportional to absolute temperature, level detection of fluids and anemometry.
The high-impedance current output of the SGM446 makes the device insensitive to voltage drops especially on long lines. Therefore, it is particularly suitable for remote sensing applications. The multiplex of the SGM446 is achieved by switching the current through a CMOS multiplexer or switching the supply voltage through the logic gate.
The SGM446 is available in Green UTDFN-2×2-2L and UTDFN-2×2-4L packages. It is specified over a wide temperature range of -55℃ to +150℃.
2-Terminal Device: Voltage to Current
Linear Current Output: 1μA/K
Calibration Error: ±2℃
Excellent Linearity: ±0.6℃ over Full Temperature Range
Wide Supply Voltage Range: 4V to 35V
Operating Temperature Range: -55℃ to +150℃
Available in Green UTDFN-2×2-2L and UTDFN-2×2-4L Packages
Temperature Sensing and Compensation
Industrial Temperature Measurement
Thermocouple Cold Junction Compensation
Remote Temperature Sensing
