LM94021

www.ti.com

SNIS138E – FEBRUARY 2005 – REVISED JUNE 2013

LM94021/LM94021Q Multi-Gain Analog Temperature Sensor

Check for Samples: LM94021

1

FEATURES

DESCRIPTION

The LM94021 is a precision analog output CMOS

2

•

LM94021Q is AEC-Q100 Grade 0 Qualified and

integrated-circuit temperature sensor that operates at

is Manufactured on an Automotive Grade Flow

a supply voltage as low as 1.5V. While operating over

•

Low 1.5V Operation

the wide temperature range of

−50°C to +150°C, the

•

Four Selectable Gains

LM94021 delivers an output voltage that is inversely

proportional

to

measured

temperature.

The

•

Very Accurate Over Wide Temperature Range

LM94021's low supply current makes it ideal for

of

−50°C to +150°C

battery-powered

systems

as

well

as

general

•

Low Quiescent Current

temperature sensing applications.

•

Output is Short-Circuit Protected

Two logic inputs, Gain Select 1 (GS1) and Gain

•

Extremely Small SC70 Package

Select 0 (GS0), select the gain of the temperature-to-

voltage output transfer function. Four slopes are

•

Footprint Compatible with the Industry-

selectable:

−5.5 mV/°C, −8.2 mV/°C, −10.9 mV/°C,

Standard LM20 Temperature Sensor

and

−13.6 mV/°C. In the lowest gain configuration

•

UL Recognized Component

(GS1 and GS0 both tied low), the LM94021 can

operate

with

a

1.5V

supply

while

measuring

APPLICATIONS

temperature over the full

−50°C to +150°C operating

range. Tying both inputs high causes the transfer

•

Cell Phones

function to have the largest gain of

−13.6 mV/°C for

•

Wireless Transceivers

maximum temperature sensitivity. The gain-select

•

Battery Management

inputs can be tied directly to VDD or Ground without

any

pull-up

or

pull-down

resistors,

reducing

•

Automotive

component count and board area. These inputs can

•

Disk Drives

also be driven by logic signals allowing the system to

•

Games

optimize

the

gain

during

operation

or

system

•

Appliances

diagnostics.

Table 1. KEY SPECIFICATIONS

Supply Voltage

1.5V to 5.5V

Supply Current

9

μA (typ)

20°C to 40°C

±1.5°C

−50°C to 70°C

±1.8°C

Temperature Accuracy

−50°C to 90°C

±2.1°C

−50°C to 150°C

±2.7°C

Operating Temperature

–50°C to 150°C

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.