LM135

LM135-LM235-LM335 Precision temperature sensors Features ■ Directly calibrated in °K ■ 1°C initial accuracy ■ Operates from 450µA to 5mA ■ Less than 1Ω dynamic impedance Description The LM135, LM235, LM335 are precision temperature sensors which can be easily calibrated. They operate as a 2-terminal Zener and the breakdown voltage is directly proportional to the absolute temperature at 10mV/°K. The circuit has a dynamic impedance of less than 1Ω and operates within a range of current from 450µA to 5mA without alteration of its characteristics. Calibrated at +25°C, the LM135, LM235, and LM335 have a typical error of less than 1°C over a 100°C temperature range. Unlike other sensors, the LM135, LM235, LM335 have a linear output. TO-92 (Plastic package) SO-8 (Plastic micropackage) Pin connections TO-92 (Bottom view) ADJ v+ v- SO-8 (Top view) V+ NC NC ADJ 8 7 6 5 1 2 3 NC NC NC 4 V - February 2008 Rev 3 1/16 www.st.com 16 Schematic diagram 1 Schematic diagram Figure 1. Schematic diagram LM135-LM235-LM335 2 Absolute maximum ratings Table 1. Absolute maximum ratings (AMR) Symbol Parameter LM135 LM235 LM335LM335A Unit Current IR IF Reverse Forward Toper Operating free-air temperature range(1) Continuous Intermittent Tstg Storage temperature range 1. Tj ≤ 150°C 15 mA 10 °C -55 to +150 -40 to +125 -40 to +100 +150 to +200 +125 to +150 +100 to +125 -65 to +150 °C 2/16 LM135-LM235-LM335 3 Temperature accuracy Temperature accuracy Tab...