LF31134TMR [LITTELFUSE]
Magnetic Field Sensor,;
| 型号： | LF31134TMR |
| 厂家： | 
LITTELFUSE |
| 描述： | Magnetic Field Sensor, |
| 文件： | 总6页 (文件大小：660K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
High Sensitivity Low Power TMR Switch
Position Sensing > LF11115TMR
TMR Bipolar Switch 17 Gauss 200nA Push Pull Sensor
Description
The LF11115TMR TMR Switch is a digital bipolar magnetic switch that integrates
TMR and CMOS technology in order to provide a magnetically triggered digital
switch with high sensitivity, high speed, and low power consumption.
It contains a TMR magnetic sensor and CMOS signal processing circuitry within
the same package, including an on-chip TMR voltage generator for precise
magnetic sensing, a TMR voltage amplifier and comparator plus a Schmitt
trigger to provide switching hysteresis for noise rejection, CMOS push-pull
output and X axis sensing direction.
An internal band gap regulator is used to provide a temperature compensated
supply voltage for internal circuits, permitting a wide range of supply voltages.
It draws only 200nA (see Features below) resulting in low power operation,
additionally it has fast response, accurate switching points, excellent thermal
stability, and immunity to stray field interference. It is available in the SOT23-3
package. The output of the LF11115TMR switches low (turns on) when the
magnetic field parallel to the sensing axis exceeds the operate point threshold,
BOP. When the magnetic field is reduced below the release point BRP device
output switches high (turns off). The difference between the BOP and the BRP is
the hysteresis BH of the device.
Functional Block Diagram
Vcc
Power regulator
with temperature
compensation
Offset
TMR
Sensor
Features
Vout
Latch
cancellation
• X axis sensing direction
• Tunneling Magnetoresistance (TMR)
technology
• Ultra low power consumption at
200nA
• High frequency up to 50Hz
• Operation with north and south pole
• 1.8V to 5.5V operating range
GND
Benefits
• Low switching points for high
sensitivity
TMR Switch Typical Applications Circuit
• Wider airgap capability
• Operates with smaller magnets for
cost reduction
• Excellent thermal stability
• High tolerance to external magnetic
field interference
• RoHS compliant
Vcc
Vcc
Out
TMR
0.1µF
Applications
Out
• Proximity detection
• Utility meters including gas and
water meters
• Speed sensing
• Battery powered applications
• Rotary sensing
GND
Output Behavior Versus Magnetic Pole
GND
Parameter
Test Conditions
Output (volts)
Note: It is strongly recommended that an external bypass capacitor be connected in-close-
proximity to the device between the supply and ground pins to reduce noise. The recommended
value for the external bypass capacitor is 0.1μF.
South Pole
North Pole
B > BOPS
Low (On)
High (Off)
0 < B < BRPS
Note:
The output is “High” when power is turned on under zero magnetic field.
When a S Pole approaches the pin 1 side, Vout will transition to Low.
When a N Pole approaches the pin 1 side, Vout will transition to High
© 2020 Littelfuse
Revised: 02/20/20
littelfuse.com
Specifications are subject to change without notice.
High Sensitivity Low Power TMR Switch
Position Sensing > LF11115TMR
Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified)
Symbol
Characteristics
Values
Unit
VCC
VRCC
IOUTSINK
B
Supply Voltage
Reverse Supply Voltage
Output Current
7.0
0.3
V
V
9.0
mA
Gauss
kV
Magnetic Flux Density
ESD level(HBM)
4000
4
VESD
TA
Operating Temperature
Storage Temperature
-40 ~ 125
-50 ~ 150
°C
Tstg
°C
Note: Stresses greater than the ‘Absolute Maximum Ratings’ specified above may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any
other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.
Electrical Characteristics (@TA = +25°C, Vcc = 3.0V)
Symbol
Characteristics
Min.
Typ.
Max.
Unit
Conditions
VCC
Supply Voltage
1.8
3
5.5
V
V
Operating
VOH
VOL
Output High Voltage
Vcc -0.3
Output Low Voltage
0.2
V
ICC
Supply Current
200
50
nA
Hz
Output Open
Freq
Response Frequency
Magnetic Characteristics (@TA = +25°C, Vcc = 3.0V)
Symbol
Characteristics
Min.
Typ.
Max.
Unit
BOP
BRP
BH
Operation Point
Release Point
Hysteresis
9
17
-17
34
25
-9
Gauss
Gauss
Gauss
-25
© 2020 Littelfuse
Revised: 02/20/20
littelfuse.com
Specifications are subject to change without notice.
High Sensitivity Low Power TMR Switch
Position Sensing > LF11115TMR
Pin Configuration and Sensing Direction of Magnetic Field
OUT
V
OH
V
SOT23-3
GND
3
Part Marking Code
H
B
Exxxꢀ
OL
V
1
2
0
ꢀB
RP
B
OP
B
N Pole
S Pole
Vcc
VOUT
Part Marking Code:
Magnetic Flux
Exxxy: E = LF11115TMR; xxx = Julian manufactured date; y = manufactured year
Moisture Sensitivity Level: Rating is 3
Pick and Place Nozzle: Samsung CN140 or equivalent
Pin Name
Pin No. SOT23-3
Pin Function
VOUT
2
3
1
Output
Ground
GND
VCC
Supply Voltage
Part Numbering System
LF - X - X - X - X - X TMR
Littelfuse Brand
Tunneling
Magnetoresistance
Technology Switch
SwitchType
Type 1 = Bipolar
2 = Omnipolar
3 = Unipolar
Sensitivity Gauss
1 = 5 Gauss
2 = 7 Gauss
3 = 10 Gauss
4 = 14 Gauss
5 = 17 Gauss
Output
1 = PushPull
2 = Open Drain
Quiescent Current
1 = 200nA
2 = 1.5uA
3 = 0.6mA
Sensing Axis
1 = X axis
2 =Y axis
Example: LF11115 is Bipolar, Push Pull, 200nA, X axis, 17Gauss
Note: Every combination is NOT offered. Contact Littelfuse for availability.
3 = Z axis
© 2020 Littelfuse
Revised: 02/20/20
littelfuse.com
Specifications are subject to change without notice.
High Sensitivity Low Power TMR Switch
Position Sensing > LF11115TMR
Soldering Profile for Lead-free packages
Tape and Reel
ØA
ØN
ØB
C
W1
W2
W3
178 2
54 2
13.2 0.3
2.2 0.3
8.4 1.5ꢀ0.0
12 MAX
1.4 0.4
© 2020 Littelfuse
Revised: 02/20/20
littelfuse.com
Specifications are subject to change without notice.
High Sensitivity Low Power TMR Switch
Position Sensing > LF11115TMR
SOT23-3 Package Information
Dimensions in Millimeters
Dimensions in Inches
Symbol
Min
Nom
Max
1.45
0.15
1.30
0.70
0.49
0.19
3.05
3.00
1.75
1.05
2.00
0.60
Min
-
Nom
-
Max
A
-
-
-
0.057
0.006
0.051
0.028
0.019
0.007
0.120
0.118
0.069
0.041
0.079
0.024
A1
A2
A3
b
0.00
0.90
0.60
0.39
0.12
2.85
2.60
1.55
0.85
1.80
0.35
0.000
0.035
0.024
0.015
0.005
0.112
0.102
0.061
0.033
0.071
0.014
-
1.10
0.65
-
0.043
0.026
-
c
-
-
D
2.95
2.80
1.65
0.95
1.90
0.45
0.59REF
0.25BSC
-
0.116
0.110
0.065
0.037
0.075
0.018
0.023REF
0.01BSC
-
E
E1
e
e1
L
L1
L2
Ø
00
80
00
80
© 2020 Littelfuse
Revised: 02/20/20
littelfuse.com
Specifications are subject to change without notice.
High Sensitivity Low Power TMR Switch
Position Sensing > LF311115TMR
TMR Sensor Position (SOT23-3 Elements)
Important Notice - Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive,
military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or
any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage)
other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for
products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or
damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation.
The sale and use of Littelfuse products is subject to LittelfuseTerms and Conditions of Sale, unless otherwise agreed by Littelfuse.
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the
suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all
applications. Read complete Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics.
© 2020 Littelfuse
Revised: 02/20/20
littelfuse.com
Specifications are subject to change without notice.
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