National Semiconductor LM20EP Technical data

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LM20EP
Enhanced Plastic 2.4V, 10µA, SC70, micro SMD
Temperature Sensor

LM20EP Enhanced Plastic 2.4V, 10µA, SC70, micro SMD Temperature Sensor

May 2004

General Description

The LM20EP is a precision analog output CMOS integrated­circuit temperature sensor that operates over a −55˚C to
+130˚C temperature range. The power supply operating
range is +2.4 V to +5.5 V. The transfer function of LM20EP is
predominately linear, yet has a slight predictable parabolic
curvature. The accuracy of the LM20EP when specified to a
parabolic transfer function is
ture of +30˚C. The temperature error increases linearly and
reaches a maximum of
extremes. The temperature range is affected by the power
supply voltage. At a power supply voltage of 2.7 V to 5.5 V
the temperature range extremes are +130˚C and −55˚C.
Decreasing the power supply voltage to 2.4 V changes the
negative extreme to −30˚C, while the positive remains at
+130˚C.

The LM20EP’s quiescent current is less than 10 µA. There­fore, self-heating is less than 0.02˚C in still air. Shutdown
capability for the LM20EP is intrinsic because its inherent
low power consumption allows it to be powered directly from
the output of many logic gates or does not necessitate
shutdown at all.

ENHANCED PLASTIC

Extended Temperature Performance of −55˚C to +130˚C

•

Baseline Control - Single Fab & Assembly Site

•

Process Change Notification (PCN)

•

Qualification & Reliability Data

•

Solder (PbSn) Lead Finish is standard

•

Enhanced Diminishing Manufacturing Sources (DMS)

•

Support

±

1.5˚C at an ambient tempera-

±

2.5˚C at the temperature range

Features

n Rated for full −55˚C to +130˚C range
n Available in an SC70 and a micro SMD package
n Predictable curvature error
n Suitable for remote applications

Key Specifications

j

Accuracy at +30˚C

j

Accuracy at +130˚C & −55˚C

j

Power Supply Voltage Range +2.4V to +5.5V

j

Current Drain 10 µA (max)

j

Nonlinearity

j

Output Impedance 160 Ω (max)

j

Load Regulation

<

<

I

0µA

+16 µA −2.5 mV (max)

L

±

1.5 to±4 ˚C (max)

±

2.5 to±5 ˚C (max)

±

0.4 % (typ)

Applications

n Battery Management
n Selected Military Applications
n Selected Avionics Applications

Ordering Information

PART NUMBER VID PART NUMBER NS PACKAGE NUMBER (Note 3)

LM20CIM7EP V62/04728-01 MAA05A

(Notes 1, 2) TBD TBD

Note 1: For the following (Enhanced Plastic) version, check for availability: LM20SIBPEP, LM20SIBPXEP, LM20BIM7EP, LM20BIM7XEP,
LM20CIM7XEP, LM20SITLEP, LM20SITLXEP. Parts listed with an "X" are provided in Tape & Reel and parts without an "X" are in Rails.

Note 2: FOR ADDITIONAL ORDERING AND PRODUCT INFORMATION, PLEASE VISIT THE ENHANCED PLASTIC WEB SITE AT: www.national.com/
mil

Note 3: Refer to package details under Physical Dimensions

© 2004 National Semiconductor Corporation DS200999 www.national.com

Typical Application

Full-Range Celsius (Centigrade) Temperature Sensor (−55˚C to +130˚C)
Operating from a Single Li-Ion Battery Cell

LM20EP Enhanced Plastic

Output Voltage vs Temperature

VO= (−3.88x10−6xT2) + (−1.15x10−2xT) + 1.8639

where:

T is temperature, and V

is the measured output voltage of the LM20EP.

O

Connection Diagrams

SC70-5 micro SMD

20099902

Temperature (T) Typical V

+130˚C +303 mV

+100˚C +675 mV

+80˚C +919 mV

+30˚C +1515 mV

+25˚C +1574 mV

0˚C +1863.9 mV

−30˚C +2205 mV

−40˚C +2318 mV

−55˚C +2485 mV

20099924

O

Note:

20099901

- GND (pin 2) may be grounded or left floating. For optimum thermal

conductivity to the pc board ground plane pin 2 should be grounded.

- NC (pin 1) should be left floating or grounded. Other signal traces

should not be connected to this pin.

Top View

See NS Package Number MAA05A

www.national.com 2

Note:

20099932

- Pin numbers are referenced to the package marking text orientation.

- Reference JEDEC Registration MO-211, variation BA

- The actual physical placement of package marking will vary slightly from
part to part. The package marking will designate the date code and will vary
considerably. Package marking does not correlate to device type in any way.

Top View

See NS Package Number BPA04DDC and TLA04ZZA

LM20EP Enhanced Plastic

Absolute Maximum Ratings (Note 4)

If Military/Aerospace specified devices are required,

Vapor Phase (60 seconds) +215˚C

Infrared (15 seconds) +220˚C

please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

Operating Ratings(Note 4)

Supply Voltage +6.5V to −0.2V

+

Output Voltage (V

+ 0.6 V) to

−0.6 V

Output Current 10 mA

Input Current at any pin (Note 5) 5 mA

Storage Temperature −65˚C to

+150˚C

Maximum Junction Temperature
(T

) +150˚C

JMAX

ESD Susceptibility (Note 6) :

Human Body Model 2500 V

Machine Model 250 V

Lead Temperature

SC-70 Package (Note 7) :

Specified Temperature Range: T

MIN

≤ TA≤ T

LM20BEP, LM20CEP with

+

2.4 V ≤ V

≤ 2.7 V −30˚C ≤ TA≤ +130˚C

LM20BEP, LM20CEP with

2.7 V ≤ V+≤ 5.5 V −55˚C ≤ TA≤ +130˚C

LM20SEP with

+

2.4 V ≤ V

≤ 5.5 V −30˚C ≤ TA≤ +125˚C

LM20SEP with

2.7 V ≤ V+≤ 5.5 V −40˚C ≤ TA≤ +125˚C

Supply Voltage Range (V

Thermal Resistance, θ

+

) +2.4 V to +5.5 V

(Note 8)

JA

SC-70
micro SMD

MAX

415˚C/W
340˚C/W

Electrical Characteristics

Unless otherwise noted, these specifications apply for V+= +2.7 VDC. Boldface limits apply for TA=TJ=T
other limits T

Parameter Conditions Typical

= 25˚C; Unless otherwise noted.

A=TJ

(Note 9)

LM20BEP LM20CEP LM20SEP Units

Limits Limits Limits

(Note 10) (Note 10) (Note 10)

Temperature to Voltage Error

= (−3.88x10−6xT2)

V

O

+ (−1.15x10

−2

xT) + 1.8639V

(Note 11)

= +25˚C to +30˚C

T

A

T

= +130˚C

A

T

= +125˚C

A

T

= +100˚C

A

T

= +85˚C

A

T

= +80˚C

A

T

= 0˚C

A

T

= −30˚C

A

T

= −40˚C

A

T

= −55˚C

A

±

1.5

±

2.5

±

2.5

±

2.2

±

2.1

±

2.0

±

1.9

±

2.2

±

2.3

±

2.5

±

4.0

±

5.0 ˚C (max)

±

5.0

±

4.7

±

4.6

±

4.5

±

4.4

±

4.7

±

4.8

±

5.0 ˚C (max)

±

±
±
±
±
±
±
±

Output Voltage at 0˚C +1.8639 V

Variance from Curve

Non-Linearity (Note 12) −20˚C ≤ T

Sensor Gain (Temperature

−30˚C ≤ T

Sensitivity or Average Slope)

≤ +80˚C

A

≤ +100˚C −11.77 −11.4

A

±

1.0 ˚C

±

0.4 %

−12.2

−11.0

−12.6

−11.0

−12.6

to equation:

=−11.77 mV/˚CxT+1.860V

V

O

Output Impedance 0 µA ≤ I

≤ +16 µA

L

160 160 160 Ω (max)

(Notes 14, 15)

Load Regulation(Note 13) 0 µA ≤ I

≤ +16 µA

L

−2.5 −2.5 −2.5 mV (max)

(Notes 14, 15)

+

Line Regulation +2. 4 V ≤ V

+5.0 V ≤ V

Quiescent Current +2. 4V ≤ V

+5.0V ≤ V

+2. 4V ≤ V

Change of Quiescent Current +2. 4 V ≤ V

≤ +5.0V +3.3 +3.7 +3.7 mV/V (max)

+

≤ +5.5 V +11 +11 +11 mV (max)

+

≤ +5.0V 4.5 7 7 7 µA (max)

+

≤ +5.5V 4.5 9 9 9 µA (max)

+

≤ +5.0V 4.5 10 10 10 µA (max)

+

≤ +5.5V +0.7 µA

Temperature Coefficient of −11 nA/˚C

to T

MIN

MAX

(Limit)

2.5 ˚C (max)

3.5 ˚C (max)

3.2 ˚C (max)

3.1 ˚C (max)

3.0 ˚C (max)

2.9 ˚C (max)

3.3 ˚C (min)

3.5 ˚C (max)

mV/˚C (min)

mV/˚C (max)

; all

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