AD590 Two-Terminal IC Temperature Transducer [INTERSIL FEATURES Linear current output: 1 A/K Wide range: 55C to + 150C Two-terminal device: Voltage in/current out Laser trimmed to + 0.5C calibration accuracy (AD590M) Excellent linearity: + 0.5C over full range (ADS90M) Wide power supply range: + 4V to + 30V Sensor Isolation from case Low cost GENERAL DESCRIPTION The ADS590 is a two-terminal integrated circuit temperature transducer which produces an output current proportional to absolute temperature. The device acts as a high impedance constant current regulator, passing 1 A/K for supply voit- ages between +4V and + 30V. Laser trimming of the chips thin film resistors is used to calibrate the device to 298.2 pA output at 298.2K (+ 25C). The AD590 should be used in any temperature sensing appli- cation between 55C and +150C in which conventional electrical temperature sensors are currently employed. The inherent low cost of a monolithic integrated circuit combined with the elimination of support circuitry makes the AD590 an attractive alternative for many temperature measurement situations. Linearization circuitry, precision voltage amplifi- ers, resistance-measuring circuitry and cold junction com- pensation are not needed in applying the ADS9O. In the simplest application, a resistor, a power source and any voltmeter can be used to measure temperature. In addition to temperature measurement, applications in- clude temperature compensation or correction of discrete components, and biasing proportional to absolute tempera- ture. The AD590 is available in chip form making it suitable for hybrid circuits and fast temperature measurements in protected environments. The AD590 is particularly useful in remote sensing applica- tions. The device is insensitive to voltage drops over long lines due to its high impedance current output. Any weil- insulated twisted pair is sufficient for operation hundreds of feet from the receiving circuitry. The output characteristics also make the AD590 easy to multiplex: the current can be switched by a CMOS multiplexer or the supply voltage can be switched by a logic gate output. SCHEMATIC DIAGRAM sh eR > 3 2 > 260 > 10400 CHIP SUBSTRATE 3 Ra > Ska Rs 1480 wd, q- / PIN CONFIGURATIONS CASE _ + [] ! + {Outline Drawing TO-52) (Outline Drawing DH) ORDERING INFORMATION NON-LINEARITY 10-52 CERAMIC (C) PACKAGE | PACKAGE + 3.0 ADS90IH ADS901F +15 ADS590JH ADS90JF 08 AD590KH | ADS90KF +0.4 ADS90LH | ADS9OLF +03 AD590MH | ADS90MF 5-55AD590 ABSOLUTE MAXIMUM RATINGS (Ta = + 25C unless otherwise noted) Forward Voltage(V+ toV) Reverse Voltage (V+ tov ) + 44V 20V Rated Performance Temperature Range . . Storage Temperature Range INWERSIL -- 55C to + 150C -- 65C to +175C Breakdown Voltage (Case toV+ orV~)........... #200V Lead Temperature (Soldering, 10sec)........... +300C SPECIFICATIONS (typicat values at Ty = + 25C, V+ =5V unless otherwise noted) CHARACTERISTICS AD5901 ADS590J AD590K ADS590L AD590M UNITS Output Nominal Output Current 298.2 298.2 298.2 298.2 298.2 BA @ + 25C (298.2K) Nomina! Temperature 1.0 1.0 41.0 1.0 1.0 pAlcK Coefficient Calibration Error + 10.0 max + 5.0 max #2.5 max + 1.0 max + 0.5 max C @ +25C (Notes) Absolute Error (- 55C to + 160C) Without External + 20.0 max + 10.0 max + 5.5 max + 3.0 max + 1.7 max C Calibration Adjustment With External Calibration + 5.8 max + 3.0 max ~ +2.0 max +1.6 max +1.0 max C Adjustment Non-Linearity + 3.0 max +1.5 max +0.8 max + 0.4 max +0.3 max C Repeatability (Note 2) + 0.1 max + 0.1 max + 0.1 max + 0.1 max + 0.1 max . C Long Term Drift (Note 3) +0.1 max +0.1 max +.0.1 max + 0.1 max +0.1 max *Cimonth Current Noise 40 40 40 40 40 pAia/ Hz Power Supply Rejection +4<Vt<+5V 0.5 0.5 0.5 0.5 0.5 BAIV +5<Vt<4+16V 0.2 0.2 0.2 0.2 0.2 BAIV +15V<Vt < 4+30V 0.1 0.1 0.1 041 01 pA Case Isolation to Either Lead 10 40 10' 191 19" % Effective Shunt Capacitance 100 100 100 100 100 pF Electrical Turn-On Time (Note 1) 20 20 20 20 20 KS Reverse Bias Leakage Current . 10 10 10 10 10 pA (Note 4) Power Supply Range +4to +30 +4 to +30 +4to +30 +4 to +30 +4to +30 Vv 2. Maximum deviation between + 25C reading after temperature cycling between - 55C and + 150C. Notes 1. Does not include self heating effects. 3. Conditions: Constant + 5V, constant + 125C. 4. Leakage current doubles every + 10C. TYPICAL APPLICATIONS OUTPUT CURRENT (A) > ns o 3 S Nn = a 218K =298.2K 9 =423K (- 55C) (+ 25C) (+ 150C) TEMPERATURE TA 8 AD590 5-56 se TNC ANS +___0 > < > Sika 2 Typical Connection O +5V Vy - Imvrk i~