July 2007
LM26LV
1.6 V, LLP-6 Factory Preset Temperature Switch and
Temperature Sensor
Automotive
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General Description
Disk Drives
The LM26LV is a low-voltage, precision, dual-output, low-
Games
power temperature switch and temperature sensor. The tem-
perature trip point (TTRIP) can be preset at the factory to any
temperature in the range of 0°C to 150°C in 1°C increments.
Built-in temperature hysteresis (THYST) keeps the output sta-
ble in an environment of temperature instability.
Appliances
Features
Low 1.6V operation
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In normal operation the LM26LV temperature switch outputs
assert when the die temperature exceeds TTRIP. The temper-
ature switch outputs will reset when the temperature falls
Low quiescent current
Push-pull and open-drain temperature switch outputs
Wide trip point range of 0°C to 150°C
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below
a temperature equal to (TTRIP − THYST). The
OVERTEMP digital output, is active-high with a push-pull
structure, while the OVERTEMP digital output, is active-low
with an open-drain structure.
Very linear analog VTEMP temperature sensor output
VTEMP output short-circuit protected
Accurate over −50°C to 150°C temperature range
2.2 mm by 2.5 mm (typ) LLP-6 package
Excellent power supply noise rejection
An analog output, VTEMP, delivers an analog output voltage
which is inversely proportional to the measured temperature.
Driving the TRIP TEST input high: (1) causes the digital out-
puts to be asserted for in-situ verification and, (2) causes the
threshold voltage to appear at the VTEMP output pin, which
could be used to verify the temperature trip point.
Key Specifications
■ Supply Voltage
■ Supply Current
■ Accuracy, Trip Point
Temperature
1.6V to 5.5V
The LM26LV's low minimum supply voltage makes it ideal for
1.8 Volt system designs. Its wide operating range, low supply
current , and excellent accuracy provide a temperature switch
solution for a wide range of commercial and industrial appli-
cations.
8 μA (typ)
0°C to 150°C
±2.2°C
0°C to 150°C
0°C to 120°C
−50°C to 0°C
±2.3°C
±2.2°C
±1.7°C
■ Accuracy, VTEMP
Applications
Cell phones
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■ VTEMP Output Drive
■ Operating Temperature
■ Hysteresis Temperature
±100 μA
Wireless Transceivers
−50°C to 150°C
4.5°C to 5.5°C
Digital Cameras
Personal Digital Assistants (PDA's)
Battery Management
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Connection Diagram
Typical Transfer Characteristic
LLP-6
VTEMP Analog Voltage vs Die Temperature
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Top View
See NS Package Number SDB06A
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© 2007 National Semiconductor Corporation
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