Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

LMT85 Datasheet(PDF) 11 Page - Texas Instruments

Click here to check the latest version.
No. de pieza LMT85
Descripción Electrónicos  SC70/TO-92, Analog Temperature Sensors with Class-AB Output
Download  26 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

LMT85 Datasheet(HTML) 11 Page - Texas Instruments

Back Button LMT85 Datasheet HTML 7Page - Texas Instruments LMT85 Datasheet HTML 8Page - Texas Instruments LMT85 Datasheet HTML 9Page - Texas Instruments LMT85 Datasheet HTML 10Page - Texas Instruments LMT85 Datasheet HTML 11Page - Texas Instruments LMT85 Datasheet HTML 12Page - Texas Instruments LMT85 Datasheet HTML 13Page - Texas Instruments LMT85 Datasheet HTML 14Page - Texas Instruments LMT85 Datasheet HTML 15Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 26 page
background image
J
A
JA
DD S
DD
OUT
L
T = T +
(V I ) + (V
- V
) I
T
ª
º
¬
¼
LMT85, LMT85-Q1
www.ti.com
SNIS168C – MARCH 2013 – REVISED OCTOBER 2015
Using this method of linear approximation, the transfer function can be approximated for one or more
temperature ranges of interest.
8.4 Device Functional Modes
8.4.1 Mounting and Thermal Conductivity
The LMT85/LMT85-Q1 can be applied easily in the same way as other integrated-circuit temperature sensors. It
can be glued or cemented to a surface.
To ensure good thermal conductivity, the backside of the LMT85/LMT85-Q1 die is directly attached to the GND
pin (Pin 2 for the SOT/SC70/DCK package). The temperatures of the lands and traces to the other leads of the
LMT85/LMT85-Q1 will also affect the temperature reading.
Alternatively, the LMT85/LMT85-Q1 can be mounted inside a sealed-end metal tube, and can then be dipped
into a bath or screwed into a threaded hole in a tank. As with any IC, the LMT85/LMT85-Q1 and accompanying
wiring and circuits must be kept insulated and dry, to avoid leakage and corrosion. This is especially true if the
circuit may operate at cold temperatures where condensation can occur. If moisture creates a short circuit from
the output to ground or VDD, the output from the LMT85/LMT85-Q1 will not be correct. Printed-circuit coatings are
often used to ensure that moisture cannot corrode the leads or circuit traces.
The thermal resistance junction to ambient (RθJA or θJA) parameter used to calculate the rise of a device junction
temperature due to its power dissipation. The equation used to calculate the rise in the LMT85/LMT85-Q1 die
temperature is:
(7)
where TA is the ambient temperature, IS is the supply current, ILis the load current on the output, and VO is the
output voltage. For example, in an application where TA = 30°C, VDD = 5 V, IS = 5.4 μA, VOUT = 1324 mV, and
IL = 2 μA, the junction temperature would be 30.014°C, showing a self-heating error of only 0.014°C. Since the
LMT85/LMT85-Q1's junction temperature is the actual temperature being measured, care should be taken to
minimize the load current that the LMT85/LMT85-Q1 is required to drive. For the thermal resistance of the
LMT85/LMT85Q1 in different packages see sectionThermal Information(1).
8.4.2 Output and Noise Considerations
A push-pull output gives the LMT85/LMT85-Q1 the ability to sink and source significant current. This is beneficial
when, for example, driving dynamic loads like an input stage on an analog-to-digital converter (ADC). In these
applications the source current is required to quickly charge the input capacitor of the ADC. The LMT85/LMT85-
Q1 are ideal for this and other applications which require strong source or sink current.
The LMT85/LMT85-Q1's supply-noise gain (the ratio of the AC signal on VOUT to the AC signal on VDD) was
measured during bench tests. Its typical attenuation is shown in Figure 8 found in the Typical Characteristics
section. A load capacitor on the output can help to filter noise.
For operation in very noisy environments, some bypass capacitance should be present on the supply within
approximately 5 centimeters of the LMT85/LMT85-Q1.
8.4.3 Capacitive Loads
The LMT85/LMT85-Q1 handles capacitive loading well. In an extremely noisy environment, or when driving a
switched sampling input on an ADC, it may be necessary to add some filtering to minimize noise coupling.
Without any precautions, the LMT85/LMT85-Q1 can drive a capacitive load less than or equal to 1100 pF as
shown in Figure 10. For capacitive loads greater than 1100 pF, a series resistor may be required on the output,
as shown in Figure 11.
(1)
For information on self-heating and thermal response time see section Mounting and Thermal Conductivity.
Copyright © 2013–2015, Texas Instruments Incorporated
Submit Documentation Feedback
11


Número de pieza similar - LMT85

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Texas Instruments
LMT85 TI-LMT85 Datasheet
1,020Kb / 16P
[Old version datasheet]   LMT85/LMT85-Q1 SC70, Analog Temperature Sensors with Class-AB Output
LMT85 TI1-LMT85 Datasheet
1Mb / 30P
[Old version datasheet]   SC70/TO-92, Analog Temperature Sensors with Class-AB Output
LMT85-Q1 TI1-LMT85-Q1 Datasheet
1Mb / 30P
[Old version datasheet]   SC70/TO-92, Analog Temperature Sensors with Class-AB Output
LMT85/LMT85-Q1 TI1-LMT85/LMT85-Q1 Datasheet
1Mb / 30P
[Old version datasheet]   1.5V, SC70/TO-92, Analog Temperature Sensors with Class-AB Output
LMT85/LMT85-Q1 TI1-LMT85/LMT85-Q1 Datasheet
1Mb / 30P
[Old version datasheet]   SC70/TO-92, Analog Temperature Sensors with Class-AB Output
More results

Descripción similar - LMT85

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Texas Instruments
LMT86 TI-LMT86_15 Datasheet
1Mb / 26P
[Old version datasheet]   SC70/TO-92,Analog Temperature Sensors with Class-AB Output
LMT85 TI1-LMT85_17 Datasheet
1Mb / 30P
[Old version datasheet]   SC70/TO-92, Analog Temperature Sensors with Class-AB Output
LMT87 TI-LMT87_15 Datasheet
1Mb / 25P
[Old version datasheet]   SC70/TO-92,Analog Temperature Sensors with Class-AB Output
LMT86 TI1-LMT86_17 Datasheet
1Mb / 30P
[Old version datasheet]   SC70/TO-92, Analog Temperature Sensors with Class-AB Output
LMT87 TI1-LMT87_17 Datasheet
1Mb / 29P
[Old version datasheet]   SC70/TO-92, Analog Temperature Sensors with Class-AB Output
LMT84 TI1-LMT84_17 Datasheet
1Mb / 30P
[Old version datasheet]   1.5V, SC70/TO-92, Analog Temperature Sensors with Class-AB Output
LMT84 TI-LMT84_15 Datasheet
1Mb / 26P
[Old version datasheet]   1.5V, SC70/TO-92,Analog Temperature Sensors with Class-AB Output
LMT87_017 TI1-LMT87_017 Datasheet
1Mb / 29P
[Old version datasheet]   2.7-V, SC70/TO-92/TO-92S, Analog Temperature Sensors With Class-AB Output
LMT86DCKT TI1-LMT86DCKT Datasheet
982Kb / 16P
[Old version datasheet]   LMT86/LMT86-Q1 SC70, Analog Temperature Sensors with Class-AB Output
LMT86 TI-LMT86 Datasheet
1,013Kb / 16P
[Old version datasheet]   LMT86/LMT86-Q1 SC70, Analog Temperature Sensors with Class-AB Output
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


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
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
Family Site : ic2ic.com  |   icmetro.com