MonolithicHallEffectICs
●AbsoluteMaximumRatings（Ta=25℃）
●OperationalCharacteristics
●
MagneticqandElectricalCharacteristics（Ta=25℃VDD=1.85V）
●
MagneticCharacteristicsw（Ta=−30℃〜85℃VDD=1.85V）
EM-1781
SupplyVoltage
1.6〜5.5Ｖ
OmnipolarHall
EffectSwitch
HighSensitivity
Bop：3mT
Output
CMOS
SMTHallElement
Pulse
Excitation
Item Limit
Unit
Symbol
VDD
Iout
Topr
Tstg
−0.1 〜 6.0
±
0.5
−30 〜 85
−40 〜 125
V
mA
℃
℃
Supply Voltage
Output Current
Operating Temperature Range
Storage Temperature Range
Item
Conditions Min.
Unit
Symbol
1.6
1.4*
1.1
0.3*
3.0
2.2
0.8
50
6.5
5.5
4.0
3.7*
1.5*
100
0.4
9
V
mT
mT
mT
ms
V
V
μA
Typ.
Max.
Hysteresis
Period
OutputHighVoltage
Output Low Voltage
Supply Voltage
Io=−0.5mA
Io=＋0.5mA
Average
BOPS
I
BOPN
I
BrpS
I
BrpN
I
BhS
I
BhN
I
BOPS
I
BOPN
I
BrpS
I
BrpN
I
BhS
I
BhN
I
Tp
V
OH
V
OL
VDD
Supply Current IDD
EM-1781isultra-smallHalleffectICsofasinglesiliconchipcomposedofHallelementandasignalprocessingIC.
Shippedinpacket-tapereel(5000pcs/Reel)
2:OUT
4:Vss
Output
Stage
Schmitt
trigger
&Latch
AmplifierChopper
Stabilizer
Hall
Element
Pulse
Regulator
Dynamic
OffsetCancellator
1:VDD
Switch
VDD
−0.4
Item
Conditions Min.
Unit
Symbol
1.2
0.9
0.1
3.0
2.2
0.8
4.4
4.1
1.7
mT
mT
mT
Typ.
Max.
Hysteresis
●FunctionalBlockDiagram
Release Point
Operating Point Release Point
Operating Point
NorS
SorN
Marking
3：N.C.
2：OUT
4：VSS
1：VDD
12
1［mT］=10［Gauss］
Note)Theabovespecificationsaredesigntargets.
Thecharacteristicswith「*」marksaredesigntargets.
Magneticfluxdensity
H
N-pole S-pole
BrpS BopSBopN BrpN
L
BhS
VOL
VOH
Vout
0
BhN
●ApplicationCircuit
VDD
VDD
VSS
0.1μF
GND
OUT
N.C.
CMOS
EM-1781 BypassCapacitor
43
EM-1781
●IDDPulseDriving（VDD=1.85V）
●(Forreferenceonly)LandPattern（Unit:mm)
50ms
time
146μs
IDD
Note1)Thesensorcenterislocated
    withintheφ0.3mmcircle.
Note2)Thetolerancesofdimensions
    withnomentionsis±0.1mm.
Note3)Coplanarity:Thedifferncesbetween
    standoffofterminalsaremax.0.1mm.
Note4)Thesensorpartislocated0.4mm(typ.)
    farfrommarkingsurface.
0.25
0.3
5°
5°
5°
5°
0.1
0〜0.1
0.25
＋0.1
−0
0.55
●TemparatureDependenceofBop.Brp
6
0
−
2
−
4
2
4
OperatingPoint［mT］
BopS
BrpS
BopN
BrpN
−
50
−
60 50 100
AmbientTemperature［℃］
VDD＝1.85V
IDDON
（TYP:1.8mA）
IDDOFF
（TYP:1.3μA）
IDD
（TYP:6.5μA）
b
f
j
n
o
p
●SupplyVoltage
6
5
4
3
2
1
0
−
40
−
20 40 60 8020 1000
SupplyVoltage［V］
AmbientTemperature［℃］
●FunctionTimingChart
IDD
B
Bop
Vout
High
Low
t
t
t
OperatingPointTiming
IDD
B
Brp
Vout 48.8μs
48.8μs High
Low
t
t
t
ReleasePointTiming
ThisHallICsoutputisheldasinternaldatajustbeforetheinternalcircuit
turnsOFF(IDDOFF).Andafter48.8μs,theoutputchanges.
Note)48.8μsinfiguresistypicalvalue
1.30
0.90
1.90
0.50
●Package（Unit:mm)
PinNo.
1
2
3
4
PinName
VDD
OUT
N.C.
VSS
Function
SupplyVoltage
OutputVoltage
−
GND
Comment
ShorttoGND
0.3
2.1±0.1
1.3
2.1±0.2
1.25±0.1
1
43
2
φ0.3
Sensorcenter
Line
marking
•Please be aware that our products are not intended for use in life support equipment, devices, or systems. Use of our products in such applications requires the
advance written approval of our sales staff.
Certain applications using semiconductor devices may involve potential risks of personal injury, property damage, or loss of life. In order to minimize these risks,
adequate design and operating safeguards should be provided by the customer to minimize inherent or procedural hazards. Inclusion of our products in such
applications is understood to be fully at the risk of the customer using our devices or systems.
44
IMPORTANT NOTICE
These products and thei r specifications are subject to change without notice.
When you consider any use or application of these products, please make
inquiries the sales office of Asahi Kasei Microdevices Corporation (AKM) or
authorized distributors as to current status of the products.
Descriptions of external circuits, application circuits, sof tware and ot her related
information contained in this document are provided only to illustrate the
operation and application examples of the semiconductor products. You are
fully responsible for the incorporation of these external circuits, application
circuits, software and other related information in the design of your
equipments. AKM assumes no responsibility for any losses incurred by you or
third parties arising from th e use of these information herein. AKM assumes no
liability for infringement of any patent, intellectual property, or other rights in
the application or use of such information contained herein.
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AKM products are neither intended nor authorized for use as critical
componentsNote1) in any safety, life support, or other hazard related device or
systemNote2), and AKM assumes no responsibility for such use, except for the
use approved with the express written consent by Representative Director of
AKM. As used here:
Note1) A critical component is one whose failure to function or perform
may reasonably be expected to result, whether directly or indirectly, in the
loss of the safety or effectiveness of the device or system containing it,
and which must therefore meet very high standards of performance and
reliability.
Note2) A hazard related device or system is one designed or intended for
life support or maintenance of safety or for applications in medicine,
aerospace, nuclear energy, or other fields, in which its failure to function
or perform may reasonably be expected to result in loss of life or in
significant injury or damage to person or property.
It is the responsibility of the buyer or distributor of AKM products, who
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liability for and hold AKM harmless from any and all claims arising from the
use of said product in the absence of such notification.
April 4, 2012