Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

TMP451JQDQFTQ1 Datasheet(PDF) 24 Page - Texas Instruments

Click here to check the latest version.
Part No. TMP451JQDQFTQ1
Description  짹1째C Remote and Local Temperature Sensor With 管-Factor and Offset Correction, Series-Resistance Cancellation, and Programmable Digital Filter
Download  37 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TMP451JQDQFTQ1 Datasheet(HTML) 24 Page - Texas Instruments

Back Button TMP451JQDQFTQ1 Datasheet HTML 20Page - Texas Instruments TMP451JQDQFTQ1 Datasheet HTML 21Page - Texas Instruments TMP451JQDQFTQ1 Datasheet HTML 22Page - Texas Instruments TMP451JQDQFTQ1 Datasheet HTML 23Page - Texas Instruments TMP451JQDQFTQ1 Datasheet HTML 24Page - Texas Instruments TMP451JQDQFTQ1 Datasheet HTML 25Page - Texas Instruments TMP451JQDQFTQ1 Datasheet HTML 26Page - Texas Instruments TMP451JQDQFTQ1 Datasheet HTML 27Page - Texas Instruments TMP451JQDQFTQ1 Datasheet HTML 28Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 24 / 37 page
background image
ERR
ERR
1.004
1.008
T
273.15
100 C
1.008
T
1.48 C
-
æ
ö
=
´
+
°
ç
÷
è
ø
=
°
24
TMP451-Q1
SLOS877B – OCTOBER 2014 – REVISED JUNE 2019
www.ti.com
Product Folder Links: TMP451-Q1
Submit Documentation Feedback
Copyright © 2014–2019, Texas Instruments Incorporated
Typical Application (continued)
For η = 1.004 and T(°C) = 100°C:
(5)
If a discrete transistor is used as the remote temperature sensor with the TMP451-Q1, the best accuracy can be
achieved by selecting the transistor according to the following criteria:
1. Base-emitter voltage > 0.25 V at 7.5 μA, at the highest sensed temperature.
2. Base-emitter voltage < 0.95 V at 120 μA, at the lowest sensed temperature.
3. Base resistance < 100
Ω.
4. Tight control of VBE characteristics indicated by small variations in hFE (that is, 50 to 150).
Based on this criteria, two recommended small-signal transistors are the 2N3904 (NPN) or 2N3906 (PNP).
8.2.2 Detailed Design Procedure
The local temperature sensor inside the TMP451-Q1 device monitors the ambient air around the device. The
thermal time constant for the TMP451-Q1 device is approximately two seconds. This constant implies that if the
ambient air changes quickly by 100°C, it would take the TMP451-Q1 device about 10 seconds (that is, five
thermal time constants) to settle to within 1°C of the final value. In most applications, the TMP451-Q1 package is
in electrical, and therefore thermal, contact with the printed circuit board (PCB), as well as subjected to forced
airflow. The accuracy of the measured temperature directly depends on how accurately the PCB and forced
airflow temperatures represent the temperature that the TMP451-Q1 is measuring. Additionally, the internal
power dissipation of the TMP451-Q1 can cause the temperature to rise above the ambient or PCB temperature.
The internal power dissipated as a result of exciting the remote temperature sensor is negligible because of the
small currents used. For a 3.3-V supply and maximum conversion rate of 16 conversions per second, the
TMP451-Q1 device dissipates 0.54 mW (PDIQ = 3.3 V × 165 μA). A θJA of 171.3°C/W causes the junction
temperature to rise approximately 0.09°C above the ambient.
The temperature measurement accuracy of the TMP451-Q1 device depends on the remote and/or local
temperature sensor being at the same temperature as the system point being monitored. Clearly, if the
temperature sensor is not in good thermal contact with the part of the system being monitored, then there will be
a delay in the response of the sensor to a temperature change in the system. For remote temperature-sensing
applications using a substrate transistor (or a small, SOT23 transistor) placed close to the device being
monitored, this delay is usually not a concern.
8.2.3 Application Curves
The following curves show the performance capabilities of the TMP451-Q1 device. Figure 20 shows the accuracy
performance in an oil-bath temperature drift of a population of 16 standrard 2N3906 transistors measured in a
diode-connected configuration. Figure 21 shows the typical step response to a submerging of a sensor in an oil
bath with temperature of 100°C.


Similar Part No. - TMP451JQDQFTQ1

ManufacturerPart No.DatasheetDescription
Texas Instruments
Texas Instruments
TMP451JQDQFTQ1 TI1-TMP451JQDQFTQ1 Datasheet
1Mb / 34P
[Old version datasheet]   짹1째C remote and local temperature sensor with 管-factor and offset correction, series-resistance cancellation, and programmable digital filter
TMP451JQDQFTQ1 TI1-TMP451JQDQFTQ1 Datasheet
1Mb / 37P
[Old version datasheet]   TMP451-Q1 짹1째C Remote and Local Temperature Sensor With 管-Factor and Offset Correction, Series-Resistance Cancellation, and Programmable Digital Filter
More results

Similar Description - TMP451JQDQFTQ1

ManufacturerPart No.DatasheetDescription
Texas Instruments
Texas Instruments
TMP451-Q1 TI1-TMP451-Q1 Datasheet
1Mb / 34P
[Old version datasheet]   짹1째C remote and local temperature sensor with 管-factor and offset correction, series-resistance cancellation, and programmable digital filter
TMP451 TI1-TMP451_15 Datasheet
1Mb / 41P
[Old version datasheet]   TMP451 짹1째C Remote and Local Temperature Sensor With 管-Factor and Offset Correction, Series-Resistance Cancellation, and Programmable Digital Filter
TMP442 TI-TMP442_15 Datasheet
1Mb / 29P
[Old version datasheet]   TMP451-Q1 짹1째C Remote and Local Temperature Sensor with 管-Factor and Offset Correction, Series-Resistance Cancellation, and Programmable Digital Filter
TMP451-Q1 TI-TMP451-Q1_15 Datasheet
1Mb / 34P
[Old version datasheet]   TMP451-Q1 짹1째C Remote and Local Temperature Sensor with 管-Factor and Offset Correction, Series-Resistance Cancellation, and Programmable Digital Filter
TMP451-Q1 TI1-TMP451-Q1_V02 Datasheet
1Mb / 37P
[Old version datasheet]   TMP451-Q1 짹1째C Remote and Local Temperature Sensor With 管-Factor and Offset Correction, Series-Resistance Cancellation, and Programmable Digital Filter
TMP411 TI1-TMP411_16 Datasheet
1,012Kb / 33P
[Old version datasheet]   Remote and Local TEMPERATURE SENSOR with N-Factor and Series Resistance Correction
Burr-Brown (TI)
Burr-Brown (TI)
TMP411 BURR-BROWN-TMP411 Datasheet
369Kb / 25P
   짹1C Remote and Local TEMPERATURE SENSOR with N-Factor and Series Resistance Correction
Texas Instruments
Texas Instruments
TMP411-Q1 TI-TMP411-Q1_15 Datasheet
2Mb / 40P
[Old version datasheet]   짹1째C Remote and Local Temperature Sensor With N-Factor and Series Resistance Correction
TMP411 TI1-TMP411_13 Datasheet
973Kb / 32P
[Old version datasheet]   짹1째C Remote and Local TEMPERATURE SENSOR with N-Factor and Series Resistance Correction
TMP411ADRG4 TI-TMP411ADRG4 Datasheet
747Kb / 32P
[Old version datasheet]   짹1째C Remote and Local TEMPERATURE SENSOR with N-Factor and Series Resistance Correction
More results


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37 


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz