LM26LVCISD-050 NSC [National Semiconductor], LM26LVCISD-050 Datasheet

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LM26LVCISD-050

Manufacturer Part Number
LM26LVCISD-050
Description
1.6 V, LLP-6 Factory Preset Temperature Switch and Temperature Sensor
Manufacturer
NSC [National Semiconductor]
Datasheet
© 2008 National Semiconductor Corporation
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
temperature in the range of 0°C to 150°C in 1°C increments.
Built-in temperature hysteresis (T
ble in an environment of temperature instability.
In normal operation the LM26LV temperature switch outputs
assert when the die temperature exceeds T
ature switch outputs will reset when the temperature falls
below a temperature equal to (T
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
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
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
Connection Diagram
Cell phones
Wireless Transceivers
Digital Cameras
Personal Digital Assistants (PDA's)
Battery Management
See NS Package Number SDB06A
TEMP
TRIP
) can be preset at the factory to any
, delivers an analog output voltage
Top View
LLP-6
HYST
TEMP
) keeps the output sta-
TRIP
202047
output pin, which
TRIP
− T
. The temper-
20204701
HYST
). The
Features
Key Specifications
Typical Transfer Characteristic
Supply Voltage
Supply Current
Accuracy, Trip Point
Temperature
Accuracy, V
V
Operating Temperature
Hysteresis Temperature
Automotive
Disk Drives
Games
Appliances
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
V
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
TEMP
TEMP
V
TEMP
Output Drive
output short-circuit protected
Analog Voltage vs Die Temperature
TEMP
TEMP
temperature sensor output
0°C to 150°C
0°C to 150°C
0°C to 120°C
−50°C to 0°C
−50°C to 150°C
4.5°C to 5.5°C
20204724
www.national.com
May 16, 2008
1.6V to 5.5V
8 μA (typ)
±100 μA
±2.2°C
±2.3°C
±2.2°C
±1.7°C

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LM26LVCISD-050 Summary of contents

Page 1

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 ) can be preset at the factory ...

Page 2

Block Diagram Pin Descriptions Pin Name Type No. TRIP Digital 1 TEST Input Digital 5 OVERTEMP Output Digital 3 OVERTEMP Output Analog V 6 TEMP Output 4 V Power DD 2 GND Ground www.national.com Equivalent Circuit TRIP TEST pin. Active ...

Page 3

Typical Application 20204702 3 www.national.com ...

Page 4

... LM26LVCISD-080 80°C LM26LVCISDX-080 80°C LM26LVCISD-075 75°C LM26LVCISDX-075 75°C LM26LVCISD-070 70°C LM26LVCISDX-070 70°C LM26LVCISD-065 65°C LM26LVCISDX-065 65°C LM26LVCISD-060 60°C LM26LVCISDX-060 60°C LM26LVCISD-050 50°C LM26LVCISDX-050 50°C www.national.com NS Package Top Mark Number SDB06A 150 SDB06A 150 SDB06A 145 SDB06A 145 SDB06A 140 SDB06A 140 ...

Page 5

Absolute Maximum Ratings Supply Voltage Voltage at OVERTEMP pin Voltage at OVERTEMP and V pins −0. TEMP TRIP TEST Input Voltage −0. Output Current, any output pin Input Current at any pin (Note 2) Storage Temperature ...

Page 6

Electrical Characteristics Unless otherwise noted, these specifications apply for + all other limits 25°C. MAX A J Symbol Parameter GENERAL SPECIFICATIONS I Quiescent Power Supply S Current Hysteresis OVERTEMP DIGITAL OUTPUT V Logic "1" ...

Page 7

Electrical Characteristics Unless otherwise noted, these specifications apply for + all other limits 25°C. MAX A J Symbol Parameter TRIP TEST DIGITAL INPUT V Logic "1" Threshold Voltage IH V Logic "0" Threshold Voltage ...

Page 8

Notes Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see ...

Page 9

Typical Performance Characteristics V Output Temperature Error vs. Temperature TEMP Supply Current vs. Temperature Load Regulation, 100 mV Overhead T = 80°C Sourcing Current (Note 14) Minimum Operating Temperature vs. Supply Voltage 20204707 Supply Current vs. Supply Voltage 20204704 Load ...

Page 10

Load Regulation, 400 mV Overhead T = 80°C Sourcing Current (Note 14) Load Regulation, V Sinking Current (Note 15) Load Regulation, V Sinking Current (Note 15) www.national.com 20204747 = 1.6V DD 20204741 = 2.4V Change 20204745 10 ...

Page 11

V Supply-Noise Gain vs. Frequency TEMP 20204743 V vs. Supply Voltage TEMP Gain 2: For Trip Points 70 - 109°C 20204735 V vs. Supply Voltage TEMP Gain 4: For Trip Points 130 - 150°C 20204737 V vs. Supply Voltage TEMP ...

Page 12

LM26LV V vs Die TEMP Temperature Conversion Table The LM26LV has one out of four possible factory-set gains, Gain 1 through Gain 4, depending on the range of the Tem- perature Trip Point. The V temperature sensor voltage, TEMP ...

Page 13

29 913 1369 1825 30 908 1361 1815 31 903 1354 1804 32 1346 1794 898 33 892 1338 1784 34 887 1331 1774 35 882 1323 1763 36 877 1315 1753 37 1307 1743 872 38 1300 1732 867 ...

Page 14

131 379 567 132 373 559 133 368 551 134 362 543 135 357 535 136 352 527 137 346 519 138 341 511 139 336 503 140 330 495 141 325 487 142 320 479 143 314 471 144 ...

Page 15

OVERTEMP and OVERTEMP Digital Outputs The OVERTEMP Active High, Push-Pull Output and the OVERTEMP Active Low, Open-Drain Output both assert at the same time whenever the Die Temperature reaches the factory preset Temperature Trip Point. They also assert si- ...

Page 16

... C/W)x(5V) heating error of 0.059°C. Figure 3 shows the thermal resistance of the LM26LV. Device Number Since the LM26LVCISD DD TEMP 16 output to ground the V output from the DD ...

Page 17

Applications Circuits FIGURE 4. Temperature Switch Using Push-Pull Output FIGURE 5. Temperature Switch Using Open-Drain Output Most CMOS ADCs found in microcontrollers and ASICs have a sampled data comparator input structure. When the ADC charges the sampling cap, it ...

Page 18

The TRIP TEST pin, normally used to check the operation of the OVERTEMP and OVERTEMP pins, may be used to latch the outputs whenever the temperature exceeds the programmed limit and causes the digital outputs to assert. As shown in ...

Page 19

... Physical Dimensions inches (millimeters) unless otherwise noted 6-Lead LLP-6 Package Order Number LM26LVCISD, LM26LVCISDX NS Package Number SDB06A 19 www.national.com ...

Page 20

For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators ...

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