ZNI1000 Temperature sensor Description The ZNI1000 is a Ni thin film Resistance Temperature Detector (RTD), specified to DIN 43760. The high temperature coefficient offers higher signal outputs than other RTD's, which results in higher accuracy with smaller temperature changes. Features • Resistance at 0°C: 1000 • Nickel temperature detector • Specified to DIN 43760 • SOT23 package Applications • Automotive electronic • Circuit protection • Temperature compensation • Temperature measurement Ordering information 1 Device Reel size (inches) Tape width (mm) Quantity per reel Device marking ZNI1000TA 7 8 3,000 ZNI ZNI1000TC 13 8 10,000 ZNI 3 2 Pinout - top view Pin 1 - Ni1000 Pin 2 - Ni1000 Pin 3 - Need a good thermal contact for short response time Issue 5 - June 2007 © Zetex Semiconductors plc 2007 1 www.zetex.com ZNI1000 Absolute maximum ratings Parameter Limit Unit ICC 5 mA Total power dissipation PTOT 20 mW Operating temperature range TA -55 to +150 °C Storage temperature range Tstg -55 to +150 °C Continuous Symbol current(a) NOTES: (a) Limited by operating temperature [ ICCⱕ(20mW/R)½ , R=func(TA)=718 to 1986⍀]. Recommended operating conditions Symbol Parameter IMDC Steady state measurement current(b) Min. Typ. Max. Unit 0,1 1,2 3,0 mA NOTES: (b) limited by self heating effects (recommended current range 0,1 to 1,5mA) [ typ. case → temperature error ⌬T= (R⭈1,2mA⭈1,2mA)/1,7mW/K ⱕ 1,7K ] [ worst case → temperature error ⌬T= (1,986k⍀⭈3,0mA⭈3,0mA)/1,4mW/K = 13,8K ]. Electrical characteristics Symbol Parameter Conditions Min. Typ. Max. Unit R0 Resistance 0°C T=0°C, IM<1mA - 1000 - ⍀ R25 Resistance 25°C T=25°C, IM = 3mA(c) 1100 1141 1200 ⍀ R100 Resistance 100°C T=100°C, IM <1mA - 1618 - ⍀ Tolerance class B(d) -55 to 0°C - ±(0.4+0.028 x ¦T¦) - °C Tolerance class B(d) 0 to 150°C - ±(0.4+0.007 x ¦T¦) - °C Long Term stability: 1000h at 150°C ⌬R 0.1 % NOTES: (c) Measured under pulse conditions. (d) See ZNi1000 Tolerance class figure. Issue 5 - June 2007 © Zetex Semiconductors plc 2007 2 www.zetex.com ZNI1000 Characteristics according to DIN43760 Resistance at a given temperature R0 Resistance at 0°C B 6.650 x 10-6 T Temperature in °C C 2.805 x 10-11 A 5.485 x 10-3 D -2.000 x 10-17 R(T) = R0 x (1 + A x T + B x T2 + C x T4+ D x T6) Formula for temperature at a given resistance 5 T(R) = A + B × 1 + C × R + D × R + E × R coefficients: 7 A = -412.6 B = 140.41 C = 0.00764 D = -6.25 x 10-17 E = -1.25 x 10-24 Self heating For accurate temperature measurement it's recommended to choose a small current in order to avoid self heating of the resistor. The temperature failure caused by the measurement current can be calculated with: ⌬T = P/EK where P = I² * R is the heat power caused by the measurement current and EK is the self heating coefficient. The self heating coefficient for the Ni1000-SOT is: EK = (1.7 ± 0.3) mW/K (Air: 23°C; no air flow). Issue 5 - June 2007 © Zetex Semiconductors plc 2007 3 www.zetex.com ZNI1000 Issue 5 - June 2007 © Zetex Semiconductors plc 2007 4 www.zetex.com ZNI1000 Package outline - SOT23 E e e1 b 3 leads L1 D E1 A A1 Dim. L c Millimeters Inches Dim. Millimeters Min. Max. Min. Max. A - 1.12 - 0.044 e1 A1 0.01 0.10 0.0004 0.004 E 2.10 2.64 0.083 0.104 b 0.30 0.50 0.012 0.020 E1 1.20 1.40 0.047 0.055 c 0.085 0.20 0.003 0.008 L 0.25 0.60 0.0098 0.0236 D 2.80 3.04 0.110 0.120 L1 0.45 0.62 0.018 0.024 - - - - - e 0.95 NOM Min. 0.037 NOM Max. Inches 1.90 NOM Min. Max. 0.075 NOM Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches Issue 5 - June 2007 © Zetex Semiconductors plc 2007 5 www.zetex.com ZNI1000 Definitions Product change Zetex Semiconductors reserves the right to alter, without notice, specifications, design, price or conditions of supply of any product or service. Customers are solely responsible for obtaining the latest relevant information before placing orders. Applications disclaimer The circuits in this design/application note are offered as design ideas. It is the responsibility of the user to ensure that the circuit is fit for the user’s application and meets with the user’s requirements. No representation or warranty is given and no liability whatsoever is assumed by Zetex with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Zetex does not assume any legal responsibility or will not be held legally liable (whether in contract, tort (including negligence), breach of statutory duty, restriction or otherwise) for any damages, loss of profit, business, contract, opportunity or consequential loss in the use of these circuit applications, under any circumstances. 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Samples may be available “Active” Product status recommended for new designs “Last time buy (LTB)” Device will be discontinued and last time buy period and delivery is in effect “Not recommended for new designs” Device is still in production to support existing designs and production “Obsolete” Production has been discontinued Datasheet status key: “Draft version” This term denotes a very early datasheet version and contains highly provisional information, which may change in any manner without notice. “Provisional version” This term denotes a pre-release datasheet. It provides a clear indication of anticipated performance. However, changes to the test conditions and specifications may occur, at any time and without notice. “Issue” This term denotes an issued datasheet containing finalized specifications. However, changes to specifications may occur, at any time and without notice. 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