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LM27-2PLMDA Datasheet(PDF) 1 Page - Texas Instruments

No. de pieza LM27-2PLMDA
Descripción Electrónicos  LM27 SOT-23, 짹3째C Accurate, 120째C-150째C Factory Preset Thermostat
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

LM27-2PLMDA Datasheet(HTML) 1 Page - Texas Instruments

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LM27-2HJ
V+=2.7V
to 5.5V
VTEMP
GND
HYST
OS
HYST
REF
TEMP
SENSOR
+
-
HYST=GND for 10
oC Hysteresis
HYST=V+ for 2
oC Hysteresis
VTEMP=(-3.552x10
-6x(T-30)2)+(-10.69576x10-3x(T-30))+1.8386V
TOS
TOS- THYST
Temp. of
Leads
OS
LM27
www.ti.com
SNIS124D – AUGUST 2002 – REVISED JULY 2013
LM27 SOT-23, ±3°C Accurate, 120°C-150°C Factory Preset Thermostat
Check for Samples: LM27
1
FEATURES
DESCRIPTION
The LM27 is a precision, single digital-output, low-
2
Internal Comparator with Pin Selectable 2°C or
power thermostat comprised of an internal reference,
10°C Hysteresis
DAC, temperature sensor and comparator. Utilizing
No External Components Required
factory programming, it can be manufactured with
Open-drain or Push-pull Digital Output;
different trip points as well as different digital output
functionality. The trip point (TOS) can be preset at the
Supports CMOS Logic Levels
factory to any temperature in the range of +120°C to
Internal Temperature Sensor with VTEMP Output
+150°C in 1°C increments. The LM27 has one digital
Pin
output (OS/OS/US/US), one digital input (HYST) and
VTEMP Output Allows After-assembly System
one analog output (VTEMP). The digital output stage
Testing
can be preset as either open-drain or push-pull. In
addition, it can be factory programmed to be active
Internal Voltage Reference and DAC for Trip-
HIGH or LOW. The digital output can be factory
point Setting
programmed
to
indicate
an
over
temperature
Currently Available in 5-pin SOT-23 Plastic
shutdown event (OS or OS) or an under temperature
Package
shutdown event (US or US). When preset as an
Excellent Power Supply Noise Rejection
overtemperature shutdown (OS) it will go LOW to
indicate that the die temperature is over the internally
preset TOS and go HIGH when the temperature goes
APPLICATIONS
below (TOS–THYST). Similarly, when preprogrammed
Microprocessor Thermal Management
as an undertemperature shutdown (US) it will go
Appliances
HIGH to indicate that the temperature is below TUS
and go LOW when the temperature is above
Portable Battery Powered Systems
(TUS+THYST). The typical hysteresis, THYST, can be set
Fan Control
to 2°C or 10°C and is controlled by the state of the
Industrial Process Control
HYST pin. A VTEMP analog output provides a voltage
that is proportional to temperature and has a
HVAC Systems
−10.7mV/°C output slope.
Electronic System Protection
Currently, there are several standard parts available,
see Table 1. For other part options, contact a Texas
KEY SPECIFICATIONS
Instruments Distributor or Sales Representative for
Power Supply Voltage 2.7V to 5.5V
information on minimum order qualification. The
Power Supply Current 40
μA (Max), 15μA (Typ)
LM27 is currently available in a 5-lead SOT-23
package.
Hysteresis Temperature 2°C or 10°C (Typ)
Temperature Trip Point Accuracy ±3°C (Max)
Simplified Block Diagram and Connection Diagram LM27CIM5-2HJ (140°C Trip-Point)
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2002–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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