LM26NV_15 Datasheet, PDF (1/17 Pages) Texas Instruments – LM26NV SOT-23, ±3°C Accurate, Factory Preset Thermostat (LM26 without VTEMP output)

LM26NV
www.ti.com
SNIS151B – AUGUST 2008 – REVISED MARCH 2013
LM26NV SOT-23, ±3°C Accurate, Factory Preset Thermostat
(LM26 without V_TEMP output)
Check for Samples: LM26NV
FEATURES
1
•2 Internal Comparator with Pin Programmable
2°C or 10°C Hysteresis
• No External Components Required
• Open Drain or Push-Pull Digital Output;
Supports CMOS Logic Levels
• Internal Temperature Sensor
• Internal Voltage Reference and DAC for Trip-
Point Setting
• Currently Available in 5-Pin SOT-23 Plastic
Package
• Excellent Power Supply Noise Rejection
APPLICATIONS
• Microprocessor Thermal Management
• Appliances
• Portable Battery Powered Systems
• Fan Control
• Industrial Process Control
• HVAC Systems
• Remote Temperature Sensing
• Electronic System Protection
KEY SPECIFICATIONS
• Power Supply Voltage: 2.7V to 5.5 V
• Power Supply Current:
– 40µA(max)
– 20µA(typ)
• Hysteresis Temperature: 2°C or 10°C(typ)
DESCRIPTION
The LM26NV is a precision, single digital-output, low-
power thermostat comprised of an internal reference,
DAC, temperature sensor and comparator. Utilizing
factory programming, it can be manufactured with
different trip points as well as different digital output
functionality. The trip point (T_OS) can be preset at the
factory to any temperature in the range of −55°C to
+110°C in 1°C increments. The LM26NV has one
digital output (OS/OS/US/US) and one digital input
(HYST). The digital output stage can be preset as
either open-drain or push-pull. In addition, it can be
factory programmed to be active HIGH or LOW. The
digital output can be factory programmed to indicate
an over temperature shutdown event (OS or OS) or
an under temperature shutdown event (US or US).
When preset as an overtemperature shutdown (OS),
it will go LOW to indicate that the die temperature is
over the internally preset T_OS and go HIGH when the
temperature goes below (T_OS–T_HYST). Similarly, when
preprogrammed as an undertemperature shutdown
(US) it will go HIGH to indicate that the temperature
is below T_US and go LOW when the temperature is
above (T_US+T_HYST). The typical hysteresis, T_HYST, can
be set to 2°C or 10°C and is controlled by the state of
the HYST pin.
Available parts are detailed in the ordering
information. For other part options, contact a Texas
Instruments Distributor or Sales Representative for
information on minimum order qualification. The
LM26NV is currently available in a 5-lead SOT-23
package.
Table 1. Temperature Trip Point Accuracy
Temperature Range
−55°C to +110°C
+120°C
LM26NV
±3°C (max)
±4°C (max)
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008–2013, Texas Instruments Incorporated