Shenzhen Fuanou Technology Co., Ltd.

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AD590JH Features and Benefits

Linear output current: 1uA/K

Wide temperature range: -55°C to +150°C

Probe Compatible Ceramic Sensor Packages

Double-Terminal Devices: Voltage Input/Current Output

Laser Trimmed to ±0.5°C Calibration Accuracy (AD590M)

Excellent linearity: ±0.3°C full scale range (AD590M)

Wide supply voltage range: 4 V to 30 V

The sensor is insulated from the housing

low cost

The AD590JH is a dual-terminal integrated circuit temperature sensor whose output current is proportional to absolute temperature. The device acts as a high impedance, constant current regulator with a regulation factor of 1 uA/K over the 4 V to 30 V supply voltage range. The on-chip thin-film resistors are laser trimmed and can be used to calibrate the device to output 298.2 μA at 298.2K (25°C).

The AD590JH is suitable for any temperature sensing application below 150°C where conventional electrical temperature sensors are currently used. The low cost of a single-chip integrated circuit and the absence of supporting circuitry make it an attractive alternative for many temperature measurement applications. When applying the AD590JH, linearization circuits, precision voltage amplifiers, resistance measurement circuits, and cold junction compensation are not required.

In addition to temperature measurement, it can also be used for temperature compensation or correction of discrete devices, bias proportional to absolute temperature, flow rate measurement, liquid level detection, and wind speed measurement. Available in die form, the AD590JH is suitable for hybrid circuits and fast temperature measurements in protected environments.

The AD590JH is ideal for remote sensing applications. It provides a high impedance current output and is insensitive to voltage drops on long lines. Any well-insulated twisted pair wire will work, up to hundreds of feet away from the receiving circuit. This output feature also facilitates multiplexing of the AD590JH: the output current can be switched by a CMOS multiplexer, or the supply voltage can be switched by a logic gate output.