Analog Devices TMP17 Datasheet

Low Cost, Current Output

a

FEATURES
Operating Temperature Range: 2408C to 11058C
Single Supply Operation: 14 V to 130 V
Excellent Repeatability and Stability
High Level Output: 1 mA/K
Monolithic IC: Temperature In/Current Out
Minimal Self-Heating Errors

APPLICATIONS
Appliance Temperature Sensor
Automotive Temperature Measurement and Control
HVAC System Monitoring
Industrial Temperature Control
Thermocouple Cold Junction Compensation

GENERAL DESCRIPTION

The TMP17 is a monolithic integrated circuit temperature
transducer that provides an output current proportional to
absolute temperature. For a wide range of supply voltages the
transducer acts as a high impedance temperature dependent
current source of 1 µA/K. Improved design and laser wafer
trimming of the IC’s thin-film resistors allows the TMP17 to
achieve absolute accuracy levels and nonlinearity errors
previously unattainable at a comparable price.

The TMP17 can be employed in applications between 240°C
to 1105°C where conventional temperature sensors (i.e.,
thermistor, RTD, thermocouple, diode) are currently being
used. Expensive linearization circuitry, precision voltage
references, bridge components, resistance measuring circuitry
and cold junction compensation are not required with the
TMP17.

378

343

1µA/K

IOUT – µA

273

248

45 25 0 70 105 125

TEMPERATURE – C

Temperature Transducer

TMP17*

FUNCTIONAL DIAGRAM

NC
V

V
NC NC

PACKAGE DIAGRAM

SO-8

NC

1

V

2

TOP VIEW

(Not to Scale)

V

3

NC

4

NC = NO CONNECT

The TMP17 is available in a low cost SO-8 surface-mount
package.

PRODUCT HIGHLIGHTS

1. A wide operating temperature range (240°C to 1105°C)

and highly linear output make the TMP17 an ideal substi­tute for older, more limited sensor technologies (i.e., therm­istors, RTDs, diodes, thermocouples).

2. The TMP17 is electrically rugged; supply irregularities and
variations or reverse voltages up to 20 V will not damage
the device.

3. Because the TMP17 is a temperature dependent current
source, it is immune to voltage noise pickup and IR drops in
the signal leads when used remotely.

4. The high output impedance of the TMP17 provides greater
than 0.5°C/V rejection of supply voltage drift and ripple.

5. Laser wafer trimming and temperature testing insures that
TMP17 units are easily interchangeable.

6. Initial system accuracy will not degrade significantly over
time. The TMP17 has proven long term performance and
repeatability advantages inherent in integrated circuit design
and construction.

NC
NC

NC

NC

8

NC

7

NC

6

NC

5

Figure 1. Transfer Characteristic

*

Protected by U.S. Patent No. 4,123,698

REV. 0

Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.

© Analog Devices, Inc., 1996

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] Fax: [phone]

TMP17F/G–SPECIFICATIONS

WARNING!

ESD SENSITIVE DEVICE

(VS = 15.0 V, 2408C ≤ TA ≤ 1058C, unless otherwise noted)

Parameter Symbol Conditions Min Typ Max Units

ACCURACY

TMP17F T
TMP17G T

= 125°C

A

= 125°C

A

1

1

62.5 °C

63.5 °C

TMP17F Over Rated Temperature 63.5 °C
TMP17G Over Rated Temperature 64.5 °C
Power Supply Rejection Ratio

14 V < V
15 V < V
115 V < V

Nonlinearity Over Rated Temperature

< 15 V PSRR 0.5 °C/V

S

< 115 V PSRR 0.3 °C/V

S

< 130 V PSRR 0.3 °C/V

S

2

0.5 °C

OUTPUT

Nominal Current Output T

= 125°C (298.2K) 298.2 µA

A

Scale Factor Over Rated Temperature 1 µA/° C
Repeatability Note 3 0.2 °C
Long Term Stability T

= 1150°C for 500 Hrs

A

4

0.2 °C/month

POWER SUPPLY

Supply Range 1V

NOTES

1

An external calibration trim can be used to zero the error @ 1 25°C.

2

Defined as the maximum deviation from a mathematically best fit line.

3

Maximum deviation between 125°C readings after a temperature cycle between 2 40°C and 1105°C. Errors of this type are noncumulative.

4

Operation at 1150°C. Errors of this type are noncumulative.

Specifications subject to change without notice.

S

ABSOLUTE MAXIMUM RATINGS*

Maximum Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . 130 V

Operating Temperature Range . . . . . . . . . . 240°C to 1105°C

Maximum Forward Voltage (1 to 2) . . . . . . . . . . . . . . 144 V

V+

430V

METALIZATION DIAGRAM

62MILS

Maximum Reverse Voltage (2 to 1) . . . . . . . . . . . . . . . 120 V

Dice Junction Temperature . . . . . . . . . . . . . . . . . . . . . 1175°C

Storage Temperature Range . . . . . . . . . . . . 265°C to 1160°C

Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . 1300°C

NOTES

*

Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation at or above this specification is not implied. Exposure to the above
maximum rating conditions for extended periods may affect device reliability.

V–

37MILS

TEMPERATURE SCALE CONVERSION EQUATIONS

5

8C = (8F 2 32)

9

9

8F = 8C 1 32

5

K = 8C 1 273.15

ORDERING GUIDE

Model Max Cal Error @ +258C Max Error –408C to +1058C Nonlinearity –408C to +1058C Package Option

TMP17FS 2.5°C 3.5°C 0.5°C SO-8
TMP17GS 3.5°C 4.5°C 0.5°C SO-8

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 the TMP17 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.

REV. 0–2–

Typical Performance Characteristics–TMP17

6
5
4
3
2
1
0
1
2
3

TEMPERATURE ERROR – C

4
5
6

50 12525

V = 5V

1

2

4

0 255075100

5

TEMPERATURE – C

MAX LIMIT

3

MIN LIMIT

Figure 2. Accuracy vs. Temperature

100

90

80

70

60
50

40
30

PERCENT OF CHANGE – %

20
10

0

0305

10 15 20 25

TIME – sec

V = 5V
SOIC PACKAGE

SOLDERED TO

0.5"

0.3" Cu PCB

Figure 3. Thermal Response in Stirred Oil Bath

1.0

0.5

0

AFTER SINGLE
TEMPERATURE

0.5

TOTAL ERROR – C

1.0

25 10525

40

CALIBRATION

TEMPERATURE –

ACCURACY

WITHOUT TRIM

C

Figure 5. Long-Term Stability @ 1125°C

500

450

400
350

300
250

TA = 105 C

200
150

OUTPUT CURRENT – µA

100

50

0

061

TA = 40 C

2345
SUPPLY VOLTAGE – V

TA = 25 C

CONSTANT I

I

I

I

OUT

OUT

OUT

OUT

UP TO 30V

= 378µA

= 298µA

= 233µA

Figure 6. V-I Characteristics

60

TRANSITION FROM 100 C STIRRED

50

40

30

20

TIME CONSTANT – sec

10

0

0 600100

BATH TO FORCED 25 C AIR
V = 5V
SOIC PACKAGE SOLDERED

TO 0.5" 0.3" Cu PCB

200 300 400 500

AIR VELOCITY – FPM

Figure 4. Thermal Time Constant in Forced Air

REV. 0 –3–

2µs

100

90

10

0%

VIN = 0V to 5V
R

= 1kΩ,

L

= 25 C

T

A

200mV

Figure 7. Output Turn-On Settling Time