LM20BIM7 National Semiconductor, LM20BIM7 Datasheet

IC, TEMPERATURE SENSOR, ± 1.5°C, SC-70-5

LM20BIM7

Manufacturer Part Number
LM20BIM7
Description
IC, TEMPERATURE SENSOR, ± 1.5°C, SC-70-5
Manufacturer
National Semiconductor
Datasheet

Specifications of LM20BIM7

Ic Output Type
Voltage
Sensing Accuracy Range
± 1.5°C
Supply Current
4.5µA
Supply Voltage Range
2.4V To 5.5V
Sensor Case Style
SC-70
No. Of Pins
5
Termination Type
SMD
Filter Terminals
SMD
Rohs Compliant
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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© 2010 National Semiconductor Corporation
2.4V, 10μA, SC70, micro SMD Temperature Sensor
General Description
The LM20 is a precision analog output CMOS integrated-cir-
cuit 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 LM20 is predomi-
nately linear, yet has a slight predictable parabolic curvature.
The accuracy of the LM20 when specified to a parabolic
transfer function is ±1.5°C at an ambient temperature of +30°
C. The temperature error increases linearly and reaches a
maximum of ±2.5°C at the temperature range 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 pow-
er supply voltage to 2.4 V changes the negative extreme to
−30°C, while the positive remains at +130°C.
The LM20's quiescent current is less than 10 μA. Therefore,
self-heating is less than 0.02°C in still air. Shutdown capability
for the LM20 is intrinsic because its inherent low power con-
sumption allows it to be powered directly from the output of
many logic gates or does not necessitate shutdown at all.
Applications
Typical Application
Full-Range Celsius (Centigrade) Temperature Sensor (−55°C to +130°C)
Operating from a Single Li-Ion Battery Cell
where:
Cellular Phones
Computers
Power Supply Modules
Battery Management
T is temperature, and V
V
O
= (−3.88×10
−6
O
×T
is the measured output voltage of the LM20.
2
) + (−1.15×10
100908
−2
×T) + 1.8639
10090802
LM20
Features
Key Specifications
■ 
■ 
■ 
■ 
■ 
■ 
■ 
FAX Machines
Printers
HVAC
Disk Drives
Appliances
Rated for full −55°C to +130°C range
Available in an SC70 and micro SMD package
Predictable curvature error
Suitable for remote applications
Accuracy at +30°C
Accuracy at +130°C & −55°C
Power Supply Voltage Range
Current Drain
Nonlinearity
Output Impedance
Load Regulation
0 μA < I
Output Voltage vs Temperature
L
< +16 μA
±1.5 to ±4 °C (max)
±2.5 to ±5 °C (max)
September 21, 2010
+2.4V to +5.5V
−2.5 mV (max)
www.national.com
160 Ω (max)
10 μA (max)
±0.4 % (typ)
10090824

Related parts for LM20BIM7

LM20BIM7 Summary of contents

Page 1

... Operating from a Single Li-Ion Battery Cell V = (−3.88×10 −6 × (−1.15×10 O where temperature, and V is the measured output voltage of the LM20. O © 2010 National Semiconductor Corporation LM20 ■ FAX Machines ■ Printers ■ HVAC ■ Disk Drives ■ Appliances Features ■ ...

Page 2

... 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 Ordering Information Order Temperature Number Accuracy LM20BIM7 ±2.5°C LM20BIM7X ±2.5°C LM20CIM7 ±5°C LM20CIM7X ±5°C LM20SITL ±3.5°C LM20SITLX ±3.5°C www.national.com ...

Page 3

... Storage Temperature Maximum Junction Temperature (T JMAX ESD Susceptibility (Note 3) Human Body Model Machine Model Soldering process must comply with National's Reflow Temperature Profile specifications. Refer to www.national.com/packaging. (Note Electrical Characteristics Unless otherwise noted, these specifications apply for V limits 25°C; Unless otherwise noted. A ...

Page 4

... Note 9: Non-Linearity is defined as the deviation of the calculated output-voltage-versus-temperature curve from the best-fit straight line, over the temperature range specified. Note 10: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output due to heating effects can be computed by multiplying the internal dissipation by the thermal resistance. ...

Page 5

... FIGURE 2. First order equations optimized for different temperature ranges. b) Layout used for measurements with small heat hink. where T is the middle of the temperature range of interest and V/°C. For example for the temperature range − MAX and The offset of the linear transfer function can be calculated us- ing the following equation: − ...

Page 6

... LM20 or its connections. The thermal resistance junction to ambient (θ rameter used to calculate the rise of a device junction tem- perature due to its power dissipation. For the LM20 the equation used to calculate the rise in the die temperature is as follows: + θ T ...

Page 7

... ADC. This requirement is easily accommodated by the addition of a capacitor. Since not all ADCs have identical input stages, the charge requirements will vary necessitating a different value of compensating capacitor. This ADC is shown as an example only digital output temperature is required please refer to devices such as the LM74. FIGURE 8. Suggested Connection to a Sampling Analog to Digital Converter Input Stage placed inside an enclosure of some type that minimizes its light exposure ...

Page 8

... The following dimensions apply to the TLA04ZZA package shown above 963µm ±30µ 600µm ±75µm www.national.com inches (millimeters) unless otherwise noted 5-Lead SC70 Molded Package Order Number LM20BIM7 or LM20CIM7X NS Package Number MAA05A Order Number LM20SITL or LM20SITLX NS Package Number TLA04ZZA 8 ...

Page 9

Notes 9 www.national.com ...

Page 10

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com 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 ...

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