LM20

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SNIS106P – DECEMBER 1999 – REVISED FEBRUARY 2013

LM20 2.4V, 10µA, SC70, DSBGA Temperature Sensor

Check for Samples: LM20

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FEATURES

DESCRIPTION

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Rated for full

−55°C to +130°C range

The LM20 is a precision analog output CMOS

•

Available in an SC70 and DSBGA package

integrated-circuit temperature sensor that operates

•

Predictable Curvature Error

over a

−55°C to 130°C temperature range. The

power supply operating range is 2.4 V to 5.5 V. The

•

Suitable for Remote Applications

transfer function of LM20 is predominately linear, yet

has a slight predictable parabolic curvature. The

APPLICATIONS

accuracy of the LM20 when specified to a parabolic

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Cellular Phones

transfer function is ±1.5°C at an ambient temperature

of 30°C. The temperature error increases linearly and

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Computers

reaches a maximum of ±2.5°C at the temperature

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Power Supply Modules

range extremes. The temperature range is affected

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Battery Management

by the power supply voltage. At a power supply

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FAX Machines

voltage of 2.7 V to 5.5 V the temperature range

extremes are 130°C and

−55°C. Decreasing the

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Printers

power supply voltage to 2.4 V changes the negative

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HVAC

extreme to

−30°C, while the positive remains at

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Disk Drives

130°C.

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Appliances

The LM20 quiescent current is less than 10

μA.

Therefore, self-heating is less than 0.02°C in still air.

KEY SPECIFICATIONS

Shutdown capability for the LM20 is intrinsic because

its inherent low power consumption allows it to be

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Accuracy at 30°C ±1.5 to ±4 °C (max)

powered directly from the output of many logic gates

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Accuracy at 130°C and

−55°C ±2.5 to ±5 °C

or does not necessitate shutdown at all.

(max)

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Power Supply Voltage Range 2.4 to 5.5 V

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Current Drain 10

μA (max)

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Nonlinearity ±0.4% (typ)

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Output Impedance 160

Ω (max)

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Load Regulation

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PRODUCTION DATA information is current as of publication date.

Copyright © 1999–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.