LM61BIZ/LFT3 National Semiconductor, LM61BIZ/LFT3 Datasheet

LM61BIZ/LFT3

Manufacturer Part Number

LM61BIZ/LFT3

Description

TO-92 ANALOG OUTPUT TEM SENS

Manufacturer

National Semiconductor

Datasheet

1.LM61BIZLFT3.pdf (12 pages)

Specifications of LM61BIZ/LFT3

Temperature Sensor Function

Temp Sensor

Output Type

Analog

Package Type

TO-92

Operating Temperature (min)

-25C

Operating Temperature (max)

85C

Operating Temperature Classification

Commercial

Operating Supply Voltage (min)

2.7V

Operating Supply Voltage (typ)

3.3/5/9V

Operating Supply Voltage (max)

10V

Lead Free Status / Rohs Status

Compliant

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

General Description

The LM61 is a precision integrated-circuit temperature sensor

that can sense a −30°C to +100°C temperature range while

operating from a single +2.7V supply. The LM61's output volt-

age is linearly proportional to Celsius (Centigrade) tempera-

ture (+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 provide accu-

racies of ±2.0°C at room temperature and ±3°C 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 in-

herent low power consumption allows it to be powered directly

from the output of many logic gates.

Features

■

Typical Application

Calibrated linear scale factor of +10 mV/°C

Rated for full −30° to +100°C range

Suitable for remote applications

UL Recognized Component

= (+10 mV/°C × T °C) + 600 mV

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

Operating from a Single Li-Ion Battery Cell

12897

Temperature (T)

+100°C

+85°C

+25°C

−25°C

−30°C

0°C

LM61

Applications

■

Key Specifications

■

Cellular Phones

Computers

Power Supply Modules

Battery Management

FAX Machines

Printers

HVAC

Disk Drives

Appliances

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 @ 25°C

Nonlinearity

Output Impedance

Typical V

+1600 mV

+1450 mV

+850 mV

+600 mV

+350 mV

+300 mV

1289702

February 9, 2010

±2.0 or ±3.0°C

+2.7V to +10V

125 µA (max)

±4.0°C (max)

±3.0°C (max)

±0.8°C (max)

www.national.com

800 Ω (max)

+10 mV/°C

(max)

Related parts for LM61BIZ/LFT3

LM61BIZ/LFT3 Summary of contents

Page 1

... Suitable for remote applications ■ UL Recognized Component Typical Application V = (+10 mV/°C × T °C) + 600 mV O FIGURE 1. Full-Range Centigrade Temperature Sensor (−30°C to +100°C) © 2010 National Semiconductor Corporation LM61 Applications ■ Cellular Phones ■ Computers ■ Power Supply Modules ■ ...

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 1289701 Accuracy Over Supplied In Specified Temperature Range (°C) 1000 ...

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

Note 11: For best long-term stability, any precision circuit will give best results if the unit is aged at a warm temperature, and/or temperature cycled for at least 46 hours before long-term life test begins. This is especially true when ...

Page 5

Accuracy vs Temperature 1289710 Supply Voltage vs Supply Current 1289712 FIGURE 2. Printed Circuit Board Used for Heat Sink to Generate All Curves. ½ Square Printed Circuit Board with 2 oz. Copper Foil or Similar. Noise Voltage Start-Up Response 1289714 ...

Page 6

Mounting The LM61 can be applied easily in the same way as other integrated-circuit temperature sensors. It can be glued or ce- mented to a surface. The temperature that the LM61 is sens- ing will be within about +0.2°C ...

Page 7

FIGURE 6. Simplified Schematic 7 1289717 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 1289720 8 1289718 1289719 ...

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

TO-92 Plastic Package (Z) Order Number LM61BIZ or LM61CIZ NS Package Number Z03A 10 ...

Page 11

Notes 11 www.national.com ...

Page 12

... 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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