Solid State Temperature Sensor Models AD590J and AD590K

Solid State Temperature Sensor - Linear 1 Microamp per Kelvin Output
AD590 Series

Features
	Linear Current Output
	Broad Range –55 to 150°C
	No Linearization Circuity Required
	Versatile and Economical
	Fast Response

AD590 - Two Styles Available:
	Low-Cost Metal TO-52 Case
	Miniature Ceramic Flat Pack
Two Accuracies Available:
	J for Low Cost
	K for Increased Accuracy
AD590 Applications
	Use in Custom-Made Probes
	Use on PC Boards for Accurate Measurements

The AD590 is a small temperature transducer that converts a temperature input into a proportional current output.

The advanced technology in the AD590 is especially suited for special temperature measurement and control applications between –55 and 150°C when solid state reliability, linearity and accuracy are required. The AD590 can be used to determine minimum, average, and differential temperatures, in addition to being used for thermocouple cold junction compensation and temperature control applications. The size and responsiveness of the AD590 make it perfect for uses where size is a consideration, such as on PC boards or heat sinks.

Just power up and measure absolute temperature (Kelvin). No linearization, amplification or cold junction compensation is required (Fig. 1). To convert reading to °C, subtract 273.15.

Specifications
Absoute Maximum Ratings
Forward Voltage (E+ to E–): +44 V
Reverse Voltage (E+ to E–): –20 V
Breakdown Voltage (case to E+ or E–): ±200 V
Lead Temperature: 300°C

Power Supply
Voltage Range: +4 to +30 Vdc

Output
Nominal Current Output at 25°C (298.2 K): 298.2 µA
Nominal Temperature Coefficient: 1 µA/K
Calibration Error: J: ±5.0°C maximum (K: ±2.5°C)
Absolute Error: w/o external
Calibration Adjustment: J: ±10.0°C maximum (K: ±5.5°C); W/25°C error set to zero J: ±3.0°C maximum (K: ±2.0°C)
Repeatability: ±0.1°C maximum
Long-Term Drift: ±0.1°C/month max.

Model #	Linearity	TO-52 Case	Flat Pack

AD590J	±1.5°C	AD590JH	AD590JF
AD590K	±0.8°C	AD590KH	AD590KF