ETC LM66CIMX

LM66
Dual Output Internally Preset Thermostat
General Description
n Electronic System Protection
The LM66 is a precision low power thermostat. Two stable
temperature trip points (VT1 and VT2) are generated by dividing down the LM66 1.250V bandgap voltage reference using
a resistors divider network. The LM66 has two digital outputs. OUT1 goes LOW when the temperature exceeds T1
and goes HIGH when the the temperature goes below
(T1–THYST). Similarly, OUT2 goes LOW when the temperature exceeds T2 and goes HIGH when the temperature goes
below (T2–THYST). THYST is an internally set 5˚C typical hysteresis.
The LM66 is currently available in an 8-lead small outline
package.
Features
Digital outputs support TTL logic levels
Internal temperature sensor
2 internal comparators with hysteresis
Internal voltage reference
Currently available in 8-pin SO plastic package
Key Specifications
j Power Supply Voltage
2.7V to 10V
j Power Supply Current
250 µA (max)
1.250V ± 1.4% (max)
j VREF
Applications
n
n
n
n
n
n
n
n
n
n
n
n
j Hysteresis Temperature
Microprocessor Thermal Management
Appliances
Portable Battery Powered 3.0V or 5V Systems
Fan Control
Industrial Process Control
HVAC Systems
Remote Temperature Sensing
5˚C
j Internal Temperature Sensor
Output Voltage
(+6.20 mV/˚C x T) +400 mV
± 3˚C (max)
n Temperature Trip Point Accuracy
n T1 set point
+73˚C
n T2 set point
+82˚C
Simplified Block Diagram and
Connection Diagram
Ordering Information
TABLE 1.
Order Number
NS Tackage
Number
Transport Media
DS100854-1
DS100854
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LM66CIMXRLSKB
M08A
M08A
Bulk Rail
2500 Units Tape
& Reel
Typical Application
DS100854-2
© 2000 National Semiconductor Corporation
LM66CIMRLSKB
DS100854-3
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LM66 Dual Output Internally Preset Thermostat
April 2000
LM66
Absolute Maximum Ratings (Note 1)
Input Voltage
Input Current at any pin (Note 2)
Package Input Current (Note 2)
Package Dissipation at TA = 25˚C
(Note 3)
ESD Susceptibility (Note 4)
Human Body Model
Machine Model
Soldering Information
SO Package (Note 5) :
Vapor Phase (60 seconds)
Infrared (15 seconds)
Storage Temperature
12V
5 mA
20 mA
215˚C
220˚C
−65˚C to + 150˚C
Operating Ratings (Note 1)
900 mW
TMIN ≤ TA ≤ TMAX
−40˚C ≤ TA ≤ +125˚C
+2.7V to +10V
+10V
Operating Temperature Range
LM66CIM
Positive Supply Voltage (V+)
Maximum VOUT1 and VOUT2
1000V
200V
LM66 Electrical Characteristics
The following specifications apply for V+ = 2.7 VDC, and VREF load current = 0 µA unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25˚C unless otherwise specified.
Symbol
Parameter
Conditions
Typical
LM66CIM
Units
(Note 6)
Limits
(Limits)
(Note 7)
Temperature Sensor
Trip Point Accuracy (Includes
VREF, Comparator Offset, and
+25˚C ≤ TA ≤ +85˚C
±3
˚C (max)
Temperature Sensitivity errors)
Trip Point Hysteresis
TA = +73˚C
TA = +82˚C
Internal Temperature Sensitivity
6
6
4.5
˚C (min)
7.5
˚C (max)
4.5
˚C (min)
7.5
˚C (max)
˚C (max)
+6.20
+25˚C ≤ TA ≤ +85˚C
mV/˚C
−40˚C ≤ TA ≤ −25˚C
±3
±4
±5
Output Impedance
−1 µA ≤ IL ≤ +40 µA
1500
Ω (max)
Line Regulation
+3.0V ≤ V+ ≤ +10V,
+25˚C ≤ TA ≤ +85˚C
± 0.36
mV/V (max)
+3.0V ≤ V+ ≤ +10V,
−40˚C ≤ TA < 25˚C
± 0.61
mV/V (max)
+2.7V ≤ V+ ≤ +3.3V
± 2.3
mV (max)
± 1.4
± 17.5
% (max)
mV (max)
Temperature Sensitivity Error
−25˚C ≤ TA ≤ +125˚C
˚C (max)
˚C (max)
VREF Output
VREF
VREF Nominal
1.250V
VREF Error
∆VREF/∆V+
Line Regulation
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V
+3.0V ≤ V+ ≤ +10V
0.13
0.21
mV/V (max)
+2.7V ≤ V+ ≤ +3.3V
0.15
1.5
mV (max)
2
The following specifications apply for V+ = 2.7 VDC, and VREF load current = 50 µA unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25˚C unless otherwise specified.
Symbol
Parameter
Conditions
Typical
Limits
Units
(Note 6)
(Note 7)
(Limits)
V+ = +10V
250
µA (max)
V+ = +2.7V
250
µA (max)
1
µA (max)
0.4
V (max)
V+ Power Supply
IS
Supply Current
Digital Output(s)
IOUT(“1”)
Logical “1” Output Leakage
Current
V+ = +5.0V
VOUT(“0”)
Logical “0” Output Voltage
IOUT = +50 µA
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 the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions.
Note 2: When the input voltage (VI) at any pin exceeds the power supply (VI < GND or VI > V+), the current at that pin should be limited to 5 mA. The 20 mA maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input current of 5 mA to four.
Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJmax (maximum junction temperature), θJA (junction to ambient thermal resistance) and TA (ambient temperature). The maximum allowable power dissipation at any temperature is PD = (TJmax–TA)/θJA or the number given
in the Absolute Maximum Ratings, whichever is lower. For this device, TJmax = 125˚C. For this device the typical thermal resistance (θJA) of the different package
types when board mounted follow:
Package Type
θJA
M08A
110˚C/W
Note 4: The human body model is a 100 pF capacitor discharge through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged directly
into each pin.
Note 5: See AN450 “Surface Mounting Methods and Their Effects on Product Reliability” or the section titled “Surface Mount” found in any post 1986 National Semiconductor Linear Data Book for other methods of soldering surface mount devices.
Note 6: Typicals are at TJ = TA = 25˚C and represent most likely parametric norm.
Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
3
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LM66
LM66 Electrical Characteristics
LM66
Part Number Template
The series of digits labled vw xy z in the part number LM66CIM-vw xy z, describe the
set points and the function of OUT1 and OUT2 as follows:
The place holders v w describe the set point of T1 as shown in the following table.
The place holders xy describe the set point of T2 as shown in the following table. z=0 (Other assignments are reserved.)
For example the part number LM66CIM-RLSKB has: T1 = 73˚C, T2 = 82˚C, OUT1 and OUT2 set as active-low
open-collector outputs with OUT1 mapped to pin 7 and OUT2 mapped to pin 6.
Temperature (˚C)
v, w, x and y
Temperature (˚C)
−5
P
5
C
−4
Q
6
D
−3
R
7
8
v, w, x and y
B
F
−2
S
G
−1
T
9
H
−0
V
10
1
X
11
2
Y
12
L
3
Z
13
N
4
J
K
The value of z describes the assignment/function of OUT1 and OUT2 as shown in the following table:
Active
Low//High
Open
Collector/
Totem Pole
Mapping
Value of z
0
0
0
B
Active-Low, Open-Collector, OUT1 mapped to pin 7, OUT2
mapped to pin 6
0
0
1
C
Active-Low, Open-Collector, OUT1 mapped to pin 6, OUT2
mapped to pin 7
0
1
0
D
Active-Low, Totem Pole, OUT1 mapped to pin 7, OUT2
mapped to pin 6
0
1
1
F
Active-Low, Totem Pole, OUT1 mapped to pin 6, OUT2
mapped to pin 7
1
0
0
G
Active-High, Open-Collector, OUT1 mapped to pin 7, OUT2
mapped to pin 6
1
0
1
H
Active-High, Open-Collector, OUT1 mapped to pin 6, OUT2
mapped to pin 7
1
1
0
J
Active-High, Totem Pole, OUT1 mapped to pin 7, OUT2
mapped to pin 6
1
1
1
K
Active-High, Totem Pole, OUT1 mapped to pin 6, OUT2
mapped to pin 7
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Function of OUT1 and OUT2
4
LM66 Dual Output Internally Preset Thermostat
Physical Dimensions
inches (millimeters) unless otherwise noted
8-Lead (0.150" Wide) Molded Small Outline Package, JEDEC
Order Number LM66CIM or LM66CIMX
NS Package Number M08A
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
National Semiconductor
Corporation
Americas
Tel: 1-800-272-9959
Fax: 1-800-737-7018
Email: [email protected]
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Europe
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Email: [email protected]
Deutsch Tel: +49 (0) 69 9508 6208
English Tel: +44 (0) 870 24 0 2171
Français Tel: +33 (0) 1 41 91 8790
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
National Semiconductor
Asia Pacific Customer
Response Group
Tel: 65-2544466
Fax: 65-2504466
Email: [email protected]
National Semiconductor
Japan Ltd.
Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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