LM26LV Datasheet, PDF (1/18 Pages) National Semiconductor (TI) – 1.6 V, LLP-6 Factory Preset Temperature Switch and Temperature Sensor

July 2007
LM26LV
1.6 V, LLP-6 Factory Preset Temperature Switch and
Temperature Sensor
General Description
The LM26LV is a low-voltage, precision, dual-output, low-
power temperature switch and temperature sensor. The tem-
perature trip point (T_TRIP) 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 (T_HYST) keeps the output sta-
ble in an environment of temperature instability.
In normal operation the LM26LV temperature switch outputs
assert when the die temperature exceeds T_TRIP. The temper-
ature switch outputs will reset when the temperature falls
below a temperature equal to (T_TRIP − T_HYST). 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.
An analog output, V_TEMP, 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 V_TEMP output pin, which
could be used to verify the temperature trip point.
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.
Applications
■ ^{Cell phones}
■ ^{Wireless Transceivers}
■ ^{Digital Cameras}
■ ^{Personal Digital Assistants (PDA's)}
■ ^{Battery Management}
■ ^Automotive
■ ^{Disk Drives}
■ ^Games
■ ^Appliances
Features
■ ^{Low 1.6V operation}
■ ^{Low quiescent current}
■ ^{Push-pull and open-drain temperature switch outputs}
■ ^{Wide trip point range of 0°C to 150°C}
■ ^{Very linear analog V}_TEMP ^{temperature sensor output}
■ ^V_TEMP ^{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}
Key Specifications
■ Supply Voltage
■ Supply Current
■ Accuracy, Trip Point
Temperature
■ Accuracy, V_TEMP
■ V_TEMP Output Drive
■ Operating Temperature
■ Hysteresis Temperature
1.6V to 5.5V
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
±100 μA
−50°C to 150°C
4.5°C to 5.5°C
Connection Diagram
Typical Transfer Characteristic
LLP-6
V_TEMP Analog Voltage vs Die Temperature
20204701
Top View
See NS Package Number SDB06A
© 2007 National Semiconductor Corporation 202047
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