LM61 - 2.7V, SOT-23 or TO-92 Temperature Sensor

Datasheet	Packaging	Samples & Pricing	Reliability	Knowledge Base

Features

•	Calibrated linear scale factor of +10 mV/°C
•	Rated for full -30° to +100°C range
•	Suitable for remote applications
•	UL Recognized Component

Key Specification

Accuracy at 25°C	±2.0 or ±3.0°C (max)
Accuracy for -30°C to +100°C	±4.0°C (max)
Accuracy for -25°C to +85°C	±3.0°C (max)
Temperature Slope	+10 mV/°C
Power Supply Voltage Range	+2.7V to +10V
Current Drain @ 25°C	125 µA (max)
Nonlinearity	±0.8°C (max)
Output Impedance	800 (max)

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. More...

Applications

•	Cellular Phones
•	Computers
•	Power Supply Modules
•	Battery Management
•	FAX Machines
•	Printers
•	HVAC
•	Disk Drives
•	Appliances

Typical Application

*click for larger image

Parameters Values

Temperature Accuracy (+/-) 2, 3 deg C

Supply Min 2.7 Volt

Quiescent Current_ 82 uA

Temperature Min -25, -30 deg C

Temperature Max 100, 85 deg C

Sensor Gain 10 mV/Deg C

Supply Max 10 Volt

Single Supply Yes

Output Impedance 800 Ohm

Quiescent Current 0.082 mA

Automotive Yes

Typical Performance

click for larger image

Also Recommended

LM94022▲	Lower Power, Lower Minimum Supply Voltage & Greater Source Current
LM20▲	Smaller Package & Lower Power
LM62▲	Downgrade

Connection Diagram

*click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LM61 2.7V, SOT-23 or TO-92 Temperature Sensor	676 Kbytes	15-Aug-05	Download
LM61 2.7V, SOT-23 or TO-92 Temperature Sensor (Japanese)	377 Kbytes

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Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Weeks

Qty

$US each

LM61BIM3

SOT-23

NOPB
STD

1
1

260
260

RoHS

Download

Full production

N/A

1K+

$0.43

reel
of
1000

T1B
XTT

6 weeks

2000

LM61CIM3

SOT-23

NOPB
STD

1
1

260
260

RoHS

Download

Full production

N/A

1K+

$0.30

reel
of
1000

T1C
XTT

6 weeks

5000

LM61BIM3X

SOT-23

NOPB

260

RoHS

Download

Full production

N/A

1K+

$0.43

reel
of
3000

T1B
XTT

6 weeks

20000

LM61CIM3X

SOT-23

NOPB

260

RoHS

Download

Full production

N/A

1K+

$0.30

reel
of
3000

T1C
XTT

6 weeks

40000

LM61BIZ

TO-92

NOPB

RoHS

Download

Full production

N/A

1K+

$0.39

box
of
1800

NSXYTT
LM61
BIZ

8 weeks

5000

LM61CIZ

TO-92

NOPB
STD

1
1

NA
NA

RoHS

Download

Full production

N/A

1K+

$0.25

box
of
1800

NSXYTT
LM61
CIZ

6 weeks

75000

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM61DIM3X	LM61BIM3	NATIONAL SEMICONDUCTOR	03 Mar 2006

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 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 provide accuracies 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 calibration simplify external circuitry required in a single supply environment where reading negative temperatures is required. 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.

Reliability Metrics

Part Number	Process	EFR Sample Size	LTA Device Hours	FITS	MTTF (Hours)
LM61BIM3	LFAST1	19510	2605000	2	739175862
LM61BIM3X	LFAST1	19510	2605000	2	739175862
LM61BIZ	LFAST1	19510	2605000	2	739175862
LM61CIM3	LFAST1	19510	2605000	2	739175862
LM61CIM3X	LFAST1	19510	2605000	2	739175862
LM61CIZ	LFAST1	19510	2605000	2	739175862

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

[Information as of 8-Nov-2009]