Analog Devices AD22100 d Datasheet

Voltage Output Temperature Sensor

FEATURES

200°C temperature span
Accuracy better than ±2% of full scale
Linearity better than ±1% of full scale
Temperature coefficient of 22.5 mV/°C
Output proportional to temperature × V+
Single-supply operation
Reverse voltage protection
Minimal self-heating
High level, low impedance output

APPLICATIONS

HVAC systems
System temperature compensation
Board level temperature sensing
Electronic thermostats

MARKETS

Industrial process control
Instrumentation
Automotive

GENERAL DESCRIPTION

The AD221001 is a monolithic temperature sensor with on-chip
signal conditioning. It can be operated over the temperature
range −50°C to +150°C, making it ideal for use in numerous
HVAC, instrumentation, and automotive applications.

with Signal Conditioning

FUNCTIONAL BLOCK DIAGRAM

V+

R

T

Figure 1.

+5V

AD22100

–50°C TO +150°C

SIGNAL OUTPUT

DIRECT TO ADC

V

O

1kΩ

Figure 2. Application Ci rcuit

0.1µF

AD22100

V

OUT

00673-C-001

REFERENCE

ANALOG-TO-

DIGITAL

CONVERTER

INPUT

00673-C-002

The signal conditioning eliminates the need for any trimming,
buffering, or linearization circuitry, greatly simplifying the
system design and reducing the overall system cost.

The output voltage is proportional to the temperature x the
supply voltage (ratiometric). The output swings from 0.25 V at

−50°C to +4.75 V at +150°C using a single +5.0 V supply.

Due to its ratiometric nature, the AD22100 offers a cost­effective solution when interfacing to an analog-to-digital
converter. This is accomplished by using the ADC’s +5 V
power supply as a reference to both the ADC and the AD22100
eliminating the need for and cost of a precision reference (see
Figure 2).

1

Protected by U.S. Patent No. 5,030,849 and 5,243,319.

Rev. D

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However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
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registered trademarks are the property of their respective owners.

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AD22100

TABLE OF CONTENTS

Specifications..................................................................................... 3

Output Stage Considerations.......................................................7

Chip Specifications....................................................................... 3

Absolute Maximum Ratings............................................................ 4

ESD Caution.................................................................................. 4

Pin Configurations and Function Descriptions ........................... 5

Typical Performance Characteristics ............................................. 6

Theory of Operation ........................................................................ 7

Absolute Accuracy and Nonlinearity Specifications ............... 7

REVISION HISTORY

7/04—Data Sheet Changed from Rev. C to Rev. D

Change to AD22100K Specifications............................................. 3

Updated Outline Dimensions....................................................... 10

Changes to Ordering Guide.......................................................... 11

6/04—Data Sheet Changed from Rev. B to Rev. C

Changes to Format ............................................................. Universal

Changes to Specifications................................................................ 3

Changes to Chip Specifications ...................................................... 3

Changes to Ratiometricity Considerations Section..................... 8

Changes to Ordering Guide.......................................................... 10

Updated Outline Dimensions....................................................... 10

Ratiometricity Considerations ....................................................8

Mounting Considerations............................................................8

Thermal Environment Effects .....................................................8

Microprocessor A/D Interface Issues .........................................9

Use with a Precision Reference as the Supply Voltage................9

Outline Dimensions ....................................................................... 10

Ordering Guide .......................................................................... 11

12/94—Data Sheet Changed from Rev. A to Rev. B

Rev. D | Page 2 of 12

AD22100

SPECIFICATIONS

TA = 25°C and V+ = 4 V to 6.5 V, unless otherwise noted.

Table 1.

AD22100K AD22100A AD22100S
Parameter Min Typ Max Min Typ Max Min Typ Max Unit

TRANSFER FUNCTION V
TEMPERATURE COEFFICIENT (V+/5 V) × 22.5 mV/°C
TOTAL ERROR

Initial Error

TA = 25°C ±0.5 ±2.0 ±1.0 ±2.0 ±1.0 ±2.0 °C

Error Overtemperature

TA = T
TA = T

MIN

MAX

±0.75 ±2.0 ±2.0 ±3.7 ±3.0 ±4.0 °C
±0.75 ±2.0 ±2.0 ±3.0 ±3.0 ±4.0 °C

Nonlinearity

TA = T

MAX

to T

MIN

0.5 0.5 1.0 % FS

OUTPUT CHARACTERISTICS

Nominal Output Voltage

V+ = 5.0 V, TA = 0°C 1.375 V
V+ = 5.0 V, TA = +100°C 3.625 V

V+ = 5.0 V, TA = −40°C 0.475 V
V+ = 5.0 V, TA = +85°C 3.288 V
V+ = 5.0 V, TA = −50°C 0.250 V
V+ = 5.0 V, TA = +150°C 4.750 V

POWER SUPPLY

Operating Voltage 4.0 5.0 6.5 4.0 5.0 6.5 4.0 5.0 6.5 V
Quiescent Current 500 650 500 650 500 650 µA

TEMPERATURE RANGE

Guaranteed Temperature Range 0 +100 −40 +85 −50 +150 °C
Operating Temperature Range −50 +150 −50 +150 −50 +150 °C

PACKAGE TO-92 TO-92 TO-92

SOIC SOIC SOIC

1

FS (full scale) is defined as the operating temperature range −50°C to +150°C. The listed maximum specification limit applies to the guaranteed temperature range.

For example, the AD22100K has a nonlinearity of (0.5%) × (200°C) = 1°C over the guaranteed temperature range of 0°C to +100°C.

CHIP SPECIFICATIONS

TA = 25°C and V+ = 5.0 V, unless otherwise noted.

Table 2.

Paramater Min Typ Max Unit

TRANSFER FUNCTION V
TEMPERATURE COEFFICIENT (V+/5 V) × 22.5 mV/°C
OUTPUT CHARACTERISTICS

Error

TA = 25°C ±0.5 ±2.0 °C

Nominal Output Voltage

TA = 25°C 1.938 V

POWER SUPPLY

Operating Voltage 4.0 5.0 6.5 V

Quiescent Current 500 650 µA
TEMPERATURE RANGE
Guaranteed Temperature Range +25 °C
Operating Temperature Range −50 +150 °C

= (V+/5 V) × [1.375 V +(22.5 mV/°C) × TA] V

OUT

1

= (V+/5 V) × [1.375 V +(22.5 mV/°C) × TA] V

OUT

Rev. D | Page 3 of 12

AD22100

ABSOLUTE MAXIMUM RATINGS

Table 3.

Parameter Rating

Supply Voltage 10 V
Reversed Continuous Supply Voltage −10 V
Operating Temperature –50°C to +150°C
Storage Temperature –65°C to +160°C
Output Short Circuit to V+ or Ground Indefinite
Lead Temperature Range

(Soldering 10 sec)
Junction Temperature 150°C

300°C

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or
any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

Rev. D | Page 4 of 12