LM66 [NSC]
Dual Output Internally Preset Thermostat; 双输出在内部预置温控器
| 型号： | LM66 |
| 厂家： | 
National Semiconductor |
| 描述： | Dual Output Internally Preset Thermostat |
| 文件： | 总5页 (文件大小：66K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
April 2000
LM66
Dual Output Internally Preset Thermostat
n Electronic System Protection
General Description
The LM66 is a precision low power thermostat. Two stable
Features
n Digital outputs support TTL logic levels
n Internal temperature sensor
n 2 internal comparators with hysteresis
n Internal voltage reference
n Currently available in 8-pin SO plastic package
temperature trip points (VT1 and VT2) are generated by divid-
ing down the LM66 1.250V bandgap voltage reference using
a resistors divider network. The LM66 has two digital out-
puts. 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 tempera-
ture exceeds T2 and goes HIGH when the temperature goes
below (T2–THYST). THYST is an internally set 5˚C typical hys-
teresis.
Key Specifications
The LM66 is currently available in an 8-lead small outline
package.
n Power Supply Voltage
n Power Supply Current
n VREF
2.7V to 10V
250 µA (max)
±
1.250V 1.4% (max)
Applications
n Microprocessor Thermal Management
n Appliances
n Hysteresis Temperature
n Internal Temperature Sensor
5˚C
Output Voltage
n Temperature Trip Point Accuracy
n T1 set point
(+6.20 mV/˚C x T) +400 mV
n Portable Battery Powered 3.0V or 5V Systems
n Fan Control
n Industrial Process Control
n HVAC Systems
±
3˚C (max)
+73˚C
n T2 set point
+82˚C
n Remote Temperature Sensing
Simplified Block Diagram and
Connection Diagram
Ordering Information
TABLE 1.
Order Number
LM66CIM-
RLSKB
LM66CIMX-
RLSKB
NS Tackage
Number
M08A
M08A
Transport Media
Bulk Rail
2500 Units Tape
& Reel
DS100854-1
Typical Application
DS100854-2
DS100854-3
© 2000 National Semiconductor Corporation
DS100854
www.national.com
Absolute Maximum Ratings (Note 1)
Vapor Phase (60 seconds)
Infrared (15 seconds)
215˚C
220˚C
Input Voltage
12V
Storage Temperature
−65˚C to + 150˚C
Input Current at any pin (Note 2)
Package Input Current (Note 2)
5 mA
20 mA
Operating Ratings (Note 1)
Package Dissipation at TA = 25˚C
(Note 3)
900 mW
Operating Temperature Range
TMIN ≤ TA ≤ TMAX
−40˚C ≤ TA ≤ +125˚C
+2.7V to +10V
+10V
ESD Susceptibility (Note 4)
Human Body Model
Machine Model
LM66CIM
Positive Supply Voltage (V+)
Maximum VOUT1 and VOUT2
1000V
200V
Soldering Information
SO Package (Note 5) :
LM66 Electrical Characteristics
The following specifications apply for V+ = 2.7 VDC, and VREF load current = 0 µA unless otherwise specified. Boldface lim-
its apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25˚C unless otherwise specified.
Typical
LM66CIM
Limits
Units
Symbol
Parameter
Conditions
(Note 6)
(Limits)
(Note 7)
Temperature Sensor
Trip Point Accuracy (Includes
REF, Comparator Offset, and
±
V
+25˚C ≤ TA ≤ +85˚C
TA = +73˚C
3
˚C (max)
Temperature Sensitivity errors)
Trip Point Hysteresis
6
6
4.5
7.5
4.5
7.5
˚C (min)
˚C (max)
˚C (min)
˚C (max)
mV/˚C
TA = +82˚C
Internal Temperature Sensitivity
Temperature Sensitivity Error
+6.20
±
±
±
+25˚C ≤ TA ≤ +85˚C
−25˚C ≤ TA ≤ +125˚C
−40˚C ≤ TA ≤ −25˚C
−1 µA ≤ IL ≤ +40 µA
3
4
5
˚C (max)
˚C (max)
˚C (max)
Ω (max)
mV/V (max)
Output Impedance
Line Regulation
1500
+3.0V ≤ V+ ≤ +10V,
0.36
±
+25˚C ≤ TA ≤ +85˚C
+3.0V ≤ V+ ≤ +10V,
0.61
mV/V (max)
mV (max)
±
<
−40˚C ≤ TA 25˚C
+2.7V ≤ V+ ≤ +3.3V
2.3
±
VREF Output
VREF
VREF Nominal
VREF Error
1.250V
V
±
1.4
% (max)
±
17.5
mV (max)
mV/V (max)
mV (max)
∆VREF/∆V+
Line Regulation
+3.0V ≤ V+ ≤ +10V
+2.7V ≤ V+ ≤ +3.3V
0.13
0.15
0.21
1.5
www.national.com
2
LM66 Electrical Characteristics
The following specifications apply for V+ = 2.7 VDC, and VREF load current = 50 µA unless otherwise specified. Boldface lim-
its 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+ Power Supply
IS
Supply Current
V+ = +10V
V+ = +2.7V
250
250
µA (max)
µA (max)
Digital Output(s)
IOUT(“1”)
Logical “1” Output Leakage
Current
V+ = +5.0V
1
µA (max)
V (max)
VOUT(“0”)
Logical “0” Output Voltage
IOUT = +50 µA
0.4
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is func-
tional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed speci-
fications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions.
+
<
>
V ), the current at that pin should be limited to 5 mA. The 20 mA maxi-
Note 2: When the input voltage (V ) at any pin exceeds the power supply (V
GND or V
I
I
I
mum 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 T (maximum junction temperature), θ (junction to am-
Jmax
JA
bient thermal resistance) and T (ambient temperature). The maximum allowable power dissipation at any temperature is P = (T
–T )/θ or the number given
A JA
A
D
Jmax
in the Absolute Maximum Ratings, whichever is lower. For this device, T
= 125˚C. For this device the typical thermal resistance (θ ) of the different package
JA
Jmax
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 Semi-
conductor Linear Data Book for other methods of soldering surface mount devices.
Note 6: Typicals are at T = T = 25˚C and represent most likely parametric norm.
J
A
Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
3
www.national.com
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.
v, w, x and y
Temperature (˚C)
v, w, x and y
Temperature (˚C)
P
Q
R
S
T
5
6
B
C
D
F
−5
−4
−3
−2
−1
−0
1
7
8
9
G
H
J
V
X
Y
Z
10
11
12
13
K
L
2
3
N
4
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
Function of OUT1 and OUT2
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
B
C
D
F
Active-Low, Open-Collector, OUT1 mapped to pin 7, OUT2
mapped to pin 6
Active-Low, Open-Collector, OUT1 mapped to pin 6, OUT2
mapped to pin 7
Active-Low, Totem Pole, OUT1 mapped to pin 7, OUT2
mapped to pin 6
Active-Low, Totem Pole, OUT1 mapped to pin 6, OUT2
mapped to pin 7
G
H
J
Active-High, Open-Collector, OUT1 mapped to pin 7, OUT2
mapped to pin 6
Active-High, Open-Collector, OUT1 mapped to pin 6, OUT2
mapped to pin 7
Active-High, Totem Pole, OUT1 mapped to pin 7, OUT2
mapped to pin 6
K
Active-High, Totem Pole, OUT1 mapped to pin 6, OUT2
mapped to pin 7
www.national.com
4
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.
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
Corporation
Americas
Tel: 1-800-272-9959
Fax: 1-800-737-7018
Email: support@nsc.com
National Semiconductor
Europe
National Semiconductor
Asia Pacific Customer
Response Group
Tel: 65-2544466
Fax: 65-2504466
National Semiconductor
Japan Ltd.
Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
Fax: +49 (0) 180-530 85 86
Email: europe.support@nsc.com
Deutsch Tel: +49 (0) 69 9508 6208
English Tel: +44 (0) 870 24 0 2171
Français Tel: +33 (0) 1 41 91 8790
Email: ap.support@nsc.com
www.national.com
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.
相关型号：
©2020 ICPDF网 联系我们和版权申明