LM235AH National Semiconductor, LM235AH Datasheet

no-image

LM235AH

Manufacturer Part Number
LM235AH
Description
Manufacturer
National Semiconductor
Datasheet

Specifications of LM235AH

Temperature Sensor Function
Temp Sensor
Output Type
Analog
Operating Temperature (min)
-40C
Operating Temperature (max)
125C
Operating Temperature Classification
Automotive
Operating Supply Voltage (min)
5V
Lead Free Status / RoHS Status
Not Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM235AH
Manufacturer:
NS
Quantity:
20 000
© 2008 National Semiconductor Corporation
LM135/LM235/LM335, LM135A/LM235A/LM335A
Precision Temperature Sensors
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/°K. With less than 1Ω dy-
namic 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.
Applications for the LM135 include almost any type of tem-
perature sensing over a −55°C to 150°C temperature range.
The low impedance and linear output make interfacing to
readout or control circuitry especially easy.
The LM135 operates over a −55°C to 150°C temperature
range while the LM235 operates over a −40°C to 125°C tem-
Schematic Diagram
5698
perature range. The LM335 operates from −40°C to 100°C.
The LM135/LM235/LM335 are available packaged in hermet-
ic TO-46 transistor packages while the LM335 is also avail-
able in plastic TO-92 packages.
Features
Directly calibrated in °Kelvin
1°C initial accuracy available
Operates from 400 μA to 5 mA
Less than 1Ω dynamic impedance
Easily calibrated
Wide operating temperature range
200°C overrange
Low cost
December 17, 2008
569801
www.national.com

Related parts for LM235AH

LM235AH Summary of contents

Page 1

... The LM135 operates over a −55°C to 150°C temperature range while the LM235 operates over a −40°C to 125°C tem- Schematic Diagram © 2008 National Semiconductor Corporation perature range. The LM335 operates from −40°C to 100°C. The LM135/LM235/LM335 are available packaged in hermet- ic TO-46 transistor packages while the LM335 is also avail- able in plastic TO-92 packages ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Reverse Current Forward Current Storage Temperature 8-Pin SOIC Package TO-92 Package TO-46 Package Temperature Accuracy LM135/LM235, LM135A/LM235A Parameter Operating Output Voltage ...

Page 3

... Units Tape and Reel 95 Units/Rail LM335M 2.5k Units Tape and Reel LM335AZ 1800 Bag LM335Z 1800 Bag LM135AH 1000 Bag LM135H 1000 Bag LM235AH 1000 Bag LM235H 1000 Bag LM335AH 1000 Bag LM335H 1000 Bag 3 TO-46 400°C/W N/A TO-46 ...

Page 4

Typical Performance Characteristics Reverse Voltage Change Reverse Characteristics Dynamic Impedance www.national.com Calibrated Error 569827 Response Time 569829 Noise Voltage 569831 4 569828 569830 569832 ...

Page 5

Thermal Resistance Junction to Air Thermal Response in Still Air 569835 Forward Characteristics 569837 Thermal Time Constant 569833 Thermal Response in Stirred Oil Bath 5 569834 569836 www.national.com ...

Page 6

... If the sensor is used in an ambient where the thermal resis- tance is constant, self heating errors can be calibrated out. This is possible if the device is run with a temperature stable current. Heating will then be proportional to zener voltage and therefore temperature. This makes the self heating error pro- portional to absolute temperature the same as scale factor errors ...

Page 7

... Remote Temperature Sensing Wire length for 1°C error due to wire drop AWG *For I = 0.5 mA, the trim pot must be deleted. R 569819 Isolated Temperature Sensor Simple Temperature Controller 0.5 mA FEET FEET 4000 8000 2500 5000 1600 3200 1000 2000   1250 625   ...

Page 8

... R2 for 2.554V across LM336. Adjust R1 for correct output. *Adjust for 2.7315V at output of LM308 www.national.com Simple Temperature Control Ground Referred Fahrenheit Thermometer Centigrade Thermometer 8 569821 569822 569823 ...

Page 9

... T 293Ω K 45.8Ω S Adjustments: Compensates for both sensor and resistor tolerances 1. Short LM329B 2. Adjust R1 for Seebeck Coefficient times ambient temperature (in degrees K) across R3. 3. Short LM335 and adjust R2 for voltage across R3 corresponding to thermocouple type. J 14. 11.79 mV Fahrenheit Thermometer Compensation for Grounded Thermocouple ...

Page 10

... COUPLE J 1.05K 856Ω T 816Ω K 128Ω 46.3Ω S Adjustments: 1. Adjust R1 for the voltage across R3 equal to the Seebeck Coefficient times ambient temperature in degrees Kelvin. 2. Adjust R2 for voltage across R4 corresponding to thermocouple. J 14. 11. 11. 1.768 mV www.national.com Single Power Supply Cold Junction Compensation ...

Page 11

... OUT 4. Remove short across LM329B and adjust R2 so that V 5. Remove short across thermocouple. †Adjust greater V than D2. Z Charge terminates on 5°C temperature rise. Couple D2 to battery. = 246 mV @ 25°C. OUT Fast Charger for Nickel-Cadmium Batteries Differential Temperature Sensor 569807 11 ...

Page 12

... Differential Temperature Sensor Variable Offset Thermometer ‡ ...

Page 13

... Ground Referred Centigrade Thermometer Air Flow Detector* Calibrated Temperature Error: The error between operating output voltage and case temperature at 10 mV/°K over a tem- perature range at a specified operating current with the 25°C error adjusted to zero. 13 ...

Page 14

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 8-Pin SOIC NS Package Number M08A TO-92 NS Package Z03A 14 ...

Page 15

TO-46 NS Package Number H03H 15 www.national.com ...

Page 16

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

Related keywords