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AD592:  Current Output – Precision IC Temperature Transducer

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The AD592 is a two terminal monolithic integrated circuit temperature transducer that provides an output current proportional to absolute temperature. For a wide range of supply voltages the transducer acts as a high impedance temperature dependent current source of 1 µA/K. Improved design and laser wafer trimming of the IC's thin film resistors allows the AD592 to achieve absolute accuracy levels and nonlinearity errors previously unattainable at a comparable price.

The AD592 can be employed in applications between -25°C and +105°C where conventional temperature sensors (i.e., thermistor, RTD, thermocouple, diode) are currently being used. The inherent low cost of a monolithic integrated circuit in a plastic package, combined with a low total parts count in any given application, make the AD592 the most cost effective temperature transducer currently available. Expensive linearization circuitry, precision voltage references, bridge components, resistance measuring circuitry and cold junction compensation are not required with the AD592.

Typical application areas include: appliance temperature sensing, automotive temperature measurement and control, HVAC (heating/ventilating/air conditioning) system monitoring, industrial temperature control, thermocouple cold junction compensation, board-level electronics temperature diagnostics, temperature readout options in instrumentation, and temperature correction circuitry for precision electronics. Particularly useful in remote sensing applications, the AD592 is immune to voltage drops and voltage noise over long lines due to its high impedance current output. AD592s can easily be multiplexed; the signal current can be switched by a CMOS multiplexer or the supply voltage can be enabled with a tri-state logic gate.

The AD592 is available in three performance grades: the AD592AN, AD592BN and AD592CN. All devices are packaged in a plastic TO-92 case rated from -45°C to +125°C. Performance is specified from -25°C to +105°C. AD592 chips are also available, contact the factory for details.

FEATURES and BENEFITS

  • High Precalibrated Accuracy:
    0.5°C max @ +25°C
  • Excellent Linearity: 0.15°C max (0°C to +70°C)
  • Wide Operating Temperature Range:
    -25°C to +105°C
  • Single Supply Operation: +4 V to +30 V
  • Excellent Repeatability and Stability
  • High Level Output: 1 µA/K
  • Two Terminal Monolithic IC:
    Temperature In/Current Out
  • Minimal Self-Heating Errors

Typical Application Circuit for AD592

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Documentation

Title Content Type File Type
AD592: Low Cost, Precision IC Temperature Transducer Data Sheet (Rev A, 07/1993) (pdf, 302 kB) Data Sheets PDF
AN-892: Temperature Measurement Theory and Practical Techniques  (pdf, 733 kB) Application Notes PDF
ADT7301: Accurate, SPI-Compatible Temperature Sensor in SOT Package  (htm)
(analogZone September 1, 2003)
Product Reviews HTM
Selection Guide: Temperature Sensors  (pdf, 807 kB) Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

AD592 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD592ACHIPS Status: Production CHIPS OR DIE 0 Comm. Tray, 210 $2.44 $2.44 Y  Material Info PCN Purchase
AD592AN Status: Production 3 ld TO-92 3 Ind Tray, 100 $2.70 $2.10 N  Material Info PCN Purchase
AD592ANZ Status: Production 3 ld TO-92 3 Ind Tray, 100 $2.46 $1.91 Y  Material Info PCN Purchase Sample
AD592BN Status: Production 3 ld TO-92 3 Ind Tray, 100 $8.39 $6.55 N  Material Info PCN Purchase
AD592BNZ Status: Production 3 ld TO-92 3 Ind Tray, 100 $7.65 $5.97 Y  Material Info PCN Purchase
AD592CN Status: Production 3 ld TO-92 3 Ind Tray, 100 $11.20 $9.39 N  Material Info PCN Purchase
AD592CNZ Status: Production 3 ld TO-92 3 Ind Tray, 100 $10.20 $8.55 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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