The LM135 series are precision, easily-calibrated, integrated circuit temperature sensors. Operating as a 2-terminal zener, the LM135 has a breakdown voltage directly proportional to absolute temperature at +10 mV/°K. With less than 1W dynamic impedance the device operates over a current range of 400 μA to 5 mA with virtually no change in performance. When calibrated at 25°C the LM135 has typically less than 1°C error over a 100°C temperature range. Unlike other sensors the LM135 has a linear output | July 1997 LM135 LM235 LM335 LM135A LM235A LM335A Precision Temperature Sensors LM135 LM235 LM335 General Description The LM135 series are precision easily-calibrated integrated circuit temperature sensors. Operating as a 2-terminal zener the LM135 has a breakdown voltage directly proportional to absolute temperature at 10 mV less than 1Q dynamic impedance the device operates over a current range of 400 pA to 5 mA with virtually no change in performance. When calibrated at 25 C ttie LM135 haa tyyically lees tlnaa 1 C errorovvra 100oCtemperaturerangg. Unlikeetharses-sors the LM135 has a linear output. Applications for the LM135 include almost any type of temperature sensing over a -55 C to 130oCtemperatnre range. The low impedance and linear output make interfacing to readout or control circuitry especially easy. The LM135 operates over a -55 C to 1350Ctemperatnre range while the LM235 operates over a -40 C to 1 i C temperature range. The LM335 operates from -40 C to 100 LM133 LM225 LM333 aae anailenle paaaaneS in hermetic TO-46 transistor packages while the LM335 is also available in plastic TO-92 packages. Features Directly calibrated in Kelvin 1 O irnticlaocaraoc anailenle Operates from 400 pA to 5 mA Less than 1Q dynamic impedance Easily calibrated Wide operating temperature range 200 . overrange Low cost Schematic Diagram DS005698-1 1997 National Semiconductor Corporation DS005698 PrintDate 1997 07 11 PrintTime 10 51 35 10228 ds005698 Rev. No. 3 Proof 1 Connection Diagrams TO-92 Plastic Package DS005698-8 Bottom View Order Number LM335Z or LM335AZ See NS Package Number Z03A SO-8 Surface Mount Package DS005698-25 Order Number LM335M or LM335AM See NS Package Number M08A TO-46 Metal Can Package DS005698-26 Case is connected to negative pin Bottom View Order Number LM135H LM135H-MIL LM235H LM335H LM135AH LM235AH or LM335AH See NS Package Number H03H 2 PrintDate 1997 07 11 PrintTime 10 51 36 10228 ds005698 Rev. No. 3 .