lm61bim3x National Semiconductor Corporation, lm61bim3x Datasheet

lm61bim3x

Manufacturer Part Number

lm61bim3x

Description

2.7v, Sot-23 Or To-92 Temperature Sensor

Manufacturer

National Semiconductor Corporation

Datasheet

1.LM61BIM3X.pdf (10 pages)

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LM61

2.7V, SOT-23 or TO-92 Temperature Sensor

General Description

The LM61 is a precision integrated-circuit temperature sen-

sor that can sense a −30˚C to +100˚C temperature range

while operating from a single +2.7V supply. The LM61’s

output voltage is linearly proportional to Celsius (Centigrade)

temperature (+10 mV/˚C) and has a DC offset of +600 mV.

The offset allows reading negative temperatures without the

need for a negative supply. The nominal output voltage of the

LM61 ranges from +300 mV to +1600 mV for a −30˚C to

+100˚C temperature range. The LM61 is calibrated to pro-

vide accuracies of

over the full −25˚C to +85˚C temperature range.

The LM61’s linear output, +600 mV offset, and factory cali-

bration simplify external circuitry required in a single supply

environment where reading negative temperatures is re-

quired. Because the LM61’s quiescent current is less than

125 µA, self-heating is limited to a very low 0.2˚C in still air.

Shutdown capability for the LM61 is intrinsic because its

inherent low power consumption allows it to be powered

directly from the output of many logic gates.

Features

n Calibrated linear scale factor of +10 mV/˚C

n Rated for full −30˚ to +100˚C range

n Suitable for remote applications

n UL Recognized Component

Typical Application

2.0˚C at room temperature and

FIGURE 1. Full-Range Centigrade Temperature Sensor (−30˚C to +100˚C)

Operating from a Single Li-Ion Battery Cell

DS012897

Temperature (T)

= (+10 mV/˚C x T ˚C) + 600 mV

+100˚C

+85˚C

+25˚C

−25˚C

−30˚C

0˚C

3˚C

Applications

n Cellular Phones

n Computers

n Power Supply Modules

n Battery Management

n FAX Machines

n Printers

n HVAC

n Disk Drives

n Appliances

Key Specifications

Typical V

Accuracy at 25˚C

Accuracy for −30˚C to +100˚C

Accuracy for −25˚C to +85˚C

Temperature Slope

Power Supply Voltage Range

Current Drain

Nonlinearity

Output Impedance

+1600 mV

+1450 mV

+850 mV

+600 mV

+350 mV

+300 mV

01289702

25˚C

+2.7V to +10V

2.0 or

125 µA (max)

www.national.com

800 Ω (max)

August 2005

4.0˚C (max)

3.0˚C (max)

0.8˚C (max)

+10 mV/˚C

(max)

3.0˚C

Related parts for lm61bim3x

lm61bim3x Summary of contents

Page 1

... Calibrated linear scale factor of +10 mV/˚C n Rated for full −30˚ to +100˚C range n Suitable for remote applications n UL Recognized Component Typical Application FIGURE 1. Full-Range Centigrade Temperature Sensor (−30˚C to +100˚C) © 2005 National Semiconductor Corporation Applications n Cellular Phones n Computers n Power Supply Modules n Battery Management ...

Page 2

... Connection Diagrams SOT-23 Top View See NS Package Number mf03a Ordering Information Order Device Number Top Mark LM61BIM3 T1B LM61BIM3X T1B LM61CIM3 T1C LM61CIM3X T1C LM61BIZ LM61BIZ LM61CIZ LM61CIZ www.national.com 01289701 Accuracy Over Supplied In Specified Temperature Range (˚C) 1000 Units on Tape and Reel ± ...

Page 3

Absolute Maximum Ratings Supply Voltage Output Voltage Output Current Input Current at any pin (Note 2) Storage Temperature Maximum Junction Temperature (T ) JMAX ESD Susceptibility (Note 3) : Human Body Model Machine Model Electrical Characteristics Unless otherwise noted, these ...

Page 4

Typical Performance Characteristics cuit board as shown in Figure 2 was used to generate the following thermal curves. Thermal Resistance Junction to Air Thermal Response in Still Air with Heat Sink Thermal Response in Still Air without a Heat Sink ...

Page 5

Typical Performance Characteristics board as shown in Figure 2 was used to generate the following thermal curves. (Continued) Accuracy vs Temperature Supply Voltage vs Supply Current The LM61 in the SOT-23 package mounted to a printed circuit 01289710 01289712 01289714 ...

Page 6

Mounting The LM61 can be applied easily in the same way as other integrated-circuit temperature sensors. It can be glued or cemented to a surface. The temperature that the LM61 is sensing will be within about +0.2˚C of the ...

Page 7

Capacitive Loads (Continued) FIGURE 6. Simplified Schematic 7 01289717 www.national.com ...

Page 8

Applications Circuits FIGURE 8. Conserving Power Dissipation with Shutdown 4.0 Recommended Solder Pads for SOT-23 Package www.national.com FIGURE 7. Centigrade Thermostat 01289720 8 01289718 01289719 ...

Page 9

... Physical Dimensions inches (millimeters) unless otherwise noted SOT-23 Molded Small Outline Transistor Package (M3) Order Number LM61BIM3, LM61BIM3X, LM61CIM3 or LM61CIM3X NS Package Number mf03a 9 www.national.com ...

Page 10

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry ...

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