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| 型號： | TMP17 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Low Cost, Current Output Temperature Transducer |
| 中文描述： | 低成本，電流輸出溫度傳感器 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 317K |
| 代理商： | TMP17 |
FUNCTIONAL DIAGRAM
NC
V
V
NC
NC
NC
NC
NC
PACKAGE DIAGRAM
SO-8
1
2
3
4
8
7
6
5
TOP VIEW
(Not to Scale)
NC = NO CONNECT
NC
NC
NC
NC
NC
V
V
NC
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.
a
Low Cost, Current Output
Temperature Transducer
TMP17*
FEATURES
Operating Temperature Range:
2
40
8
C to
1
105
8
C
Single Supply Operation:
1
4 V to
1
30 V
Excellent Repeatability and Stability
High Level Output: 1
m
A/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
μ
A/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
2
40
°
C
to
1
105
°
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.
The TMP17 is available in a low cost SO-8 surface-mount
package.
PRODUCT HIGHLIGHTS
1. A wide operating temperature range (
2
40
°
C to
1
105
°
C)
and highly linear output make the TMP17 an ideal substi-
tute for older, more limited sensor technologies (i.e., therm-
istors, 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.
Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
*
Protected by U.S. Patent No. 4,123,698
378
343
273
248
1μA/K
45
25
0
TEMPERATURE – C
70
105
125
I
O
Figure 1. Transfer Characteristic
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