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Part: LM335A
Category:
Power Management
-> Voltage References
Description: Precision Temperature Sensors
Company: ST Microelectronics, Inc.
Datasheet: Download LM335A datasheet File size : 113 kB
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Datasheet text preview:
LM135 LM235 - LM335,A
PRECISION TEMPERATURE SENSORS
s s s s
DIRECTLY CALIBRATED IN °K 1°C INITIAL ACCURACY OPERATES FROM 450µA TO 5mA LESS THAN 1 DYNAMIC IMPEDANCE
Z TO92 (Plastic Package)
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 1 and operates within a range of current from 450µA to 5mA without alteration of its characteristics. Calibrated at +25°C, the LM135, LM235, 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.
D SO8 (Plastic Micropackage)
ORDER CODE
Part Number LM135 LM235 LM335,A Temperature Range -55°C, +150°C -40°C, +125°C -40°C, +100°C Package Z · · · D · · ·
Z = TO92 Plastic package - also available in Bulk (Z), Tape & Reel (ZT) and Ammo Pack (AP)e D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top view)
TO92 (Top view) SO8 (Top view)
ADJ
v+
v-
May 2003
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LM135 - LM235 - LM335,A
SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol IR IF Toper Current Reverse Forward Operating Free-air Temperature Range 1) Continuous Intermittent Storage Temperature Range -55 to +150 +150 to +200 Parameter LM135 LM235 15 10 -40 to +125 +125 to +150 -65 to +150 -40 to +100 +100 to +125 LM335,A Unit mA
°C °C
TStg
1. Tj 150°C
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LM135 - LM235 - LM335,A
TEMPERATU RE ACCURACY
Parameter LM135 - LM235 LM335A Min. Operating Output Voltage Tcase = +25°C, IR = 1mA Uncalibrated Temperature Error (IR = 1mA) Tcase = +25°C Tmin. Tcase Tmax. Temperature Error with 25°C Calibration Tmin. Tcase Tmax., IR = 1mA LM135 - LM235 LM335 LM335A Calibrated Error at Extended Temperature Tcase = Tmax. (intermittent) Non-linearity (IR = 1mA) LM135 - LM235 LM335 LM335A 0 .3 0 .3 1 0.3 1.5 1.5 °C 2.95 Typ. 2.98 1 2 0 .5 0 .5 2 Max. 3.01 3 5 1.5 1 1 2 °C 2 Min. 2.92 LM335 Unit Typ. 2.98 5 4 Max. 3.04 6 9 V °C
°C
ELECTRICAL CHARACTERISTICS - (note 1)
LM135 - LM235 Parameter Min. Operating output voltage change with current 450µA IR 5mA at constant temperature Dynamic Impedance (IR = 1mA) Output Voltage Temperature Drift Time Constant Still Air Air 0.5m/s Stirred Oil Typ. 2.5 0.5 +10 80 10 1 0.2 Max. 10 Min. Typ. 3 0.6 +10 80 10 1 0.2 Max. 14 mV mV/°C s °C/kh LM335,A Unit
Time Stability (Tcase = +125°C)
1. Accuracy measurements are made in a well-stirred oil bath. For other conditions, self heating must be considered
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