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LM57FQPWRQ1 Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza LM57FQPWRQ1
Descripción Electrónicos  Resistor-Programmable Temperature Switch and Analog Temperature Sensor
Download  38 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

LM57FQPWRQ1 Datasheet(HTML) 1 Page - Texas Instruments

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TEMPERTURE (
SC)
J2 (-5.166mV/°C)
J3 (-7.752mV/°C)
J4 (-10.339mV/°C)
J5 (-12.924mV/°C)
C101
VDD Supply
(+2.4V to +5.5V)
GND
VDD
TOVER
VTEMP
TRIP TEST
Microcontroller
LM57
ADC Input
TOVER
Digital In
Digital Out
SENSE1
SENSE2
Analog
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LM57-Q1
SNIS191A – JULY 2015 – REVISED JULY 2015
LM57-Q1 Resistor-Programmable Temperature Switch and Analog Temperature Sensor
1 Features
3 Description
The LM57-Q1 device is a precision, dual-output,
1
Qualified for Automotive Applications, for
temperature switch with analog temperature sensor
Commercial Device See LM57 Data Sheet
output for wide temperature applications such as
AEC-Q100 Qualified with the Following Results:
automotive grade. The trip temperature (TTRIP) is
Temperature Grade 0 Extended:
−50°C to
selected from 256 possible values in the range of
–40°C to 160°C. The VTEMP is a class AB analog
+160°C with Excursions up to 170°C Operating
voltage output that is proportional to temperature with
Temperature Range
a programmable negative temperature coefficient
Temperature Grade 0:
−50°C to +150°C
(NTC). Two external 1% resistors set the TTRIP and
Operating Temperature Range
VTEMP slope. The digital and analog outputs enable
Temperature Grade 1:
−50°C to +125°C
protection and monitoring of system thermal events.
Operating Temperature Range
Built-in thermal hysteresis (THYST) prevents the digital
HBM ESD Component Classification Level 2
outputs from oscillating. The TOVER and TOVER digital
outputs will assert when the die temperature exceeds
CDM ESD Component Classification Level C5
TTRIP and will de-assert when the temperature falls
Trip Temperature Set by External Resistors with
below a temperature equal to TTRIP minus THYST.
Accuracy of ±2.3°C from
−40°C to +150°C
TOVER is active-high with a push-pull structure. TOVER
Resistor Tolerance Contributes Zero Error
is active-low with an open-drain structure. Tying
Push-Pull and Open-Drain Switch Outputs
TOVER to TRIP-TEST will latch the output after it trips.
Wide Operating Temperature Range of
−50°C to
The output can be cleared by forcing TRIP-TEST low.
160°C
Driving the TRIP-TEST high will assert the digital
outputs. A processor can check the state of TOVER or
Very Linear Analog VTEMP Temp Sensor Output
TOVER , confirming they changed to an active state.
with ±1.3°C Accuracy from
−50°C to +150°C
This allows for in situ verification that the comparator
Short-Circuit Protected Analog and Digital Outputs
and output circuitry are functional after system
Latching Function for Digital Outputs
assembly. When TRIP-TEST is high, the trip-level
reference voltage appears at the VTEMP pin. The
TRIP-TEST Pin Allows In-System Testing
system could then use this voltage to calculate the
Low Power Minimizes Self-Heating to Under
threshold of the LM57-Q1.
0.02°C
Device Information (1) (2)
2 Applications
PART NUMBER
PACKAGE
BODY SIZE (NOM)
Automotive
LM57 -Q1
TSSOP (8)
3.00 mm × 6.40 mm
Down Hole and Avionics
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
(2) For device comparison see Device Comparison Table .
LM57-Q1 Overtemperature Alarm
Temperature Transfer Function
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.


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