1.2
0.9
0.1
3.0
2.2
0.8
4.4
4.1
1.7
mT
mT
mT
NorS
SorN H
BrpS BopSBopN BrpN
L
BhS
VOL
VOH
VOUT
0
BhN
VDD
IOUT
TSTG
−0.1
−0.5
−40
6.0
＋0.5
＋125
V
mA
VDD
Topr
1.6
−30
1.85 5.5
＋85＋25
V
℃
VDD
VDD
VSS
0.1μF
GND
OUT
N.C.
CMOSOUTPUT
EM-1781
℃
1.4*
1.1
0.3*
3.0
2.2
0.8
50
6.5
4.0
3.7*
1.5*
100
0.4
9
mT
mT
mT
ms
V
V
μA
Io=−0.5mA
Io=＋0.5mA
VDD −0.4
1［mT］=10［Gauss］
Tp
VOH
VOL
IDD
BopS
I
BopN
I
BrpS
I
BrpN
I
BhS
I
BhN
I
BopS
I
BopN
I
BrpS
I
BrpN
I
BhS
I
BhN
I
2：OUT
1：VDD
Switch
Dynamic
OffsetCancellation
Output
Stage
Latch
Logic
AMP
Chopper
SW
Hall
Element
OSC
&
TimingLogic
Schmitt
Trigger
&
Latch
4：VSS
●OperationalCharacteristics
Magneticfluxdensity
elop-Selop-N
●AbsoluteMaximumRatings（Ta=25℃）
●RecommendedOperatingConditions
●
Magnetic①andElectricalCharacteristics
（Ta=25℃V
DD
=1.85V）
（Ta=−30〜＋85℃VDD=1.85V）
●
MagneticCharacteristics②
●ApplicationCircuit
Note)Theabovespecificationsaredesigntargets.
Item Max. Unit
Symbol
Supply Voltage
Output Current
Storage Temperature Range
Min.
Supply Voltage
OperatingTemperatureRange
Item Max. Unit
Symbol
Min. Typ.
Item Conditions Min. Unit
Symbol
Typ. Max.
Hysteresis
ReleasingPoint
Operating Point
BypassCapacitor
Hysteresis
Period
OutputHighVoltage
Output Low Voltage
Supply Current
ReleasingPoint
Operating Point
Item Conditions Min. Unit
Symbol
Typ. Max.
●FunctionalBlockDiagram
Marking
Thecharacteristicswith「*」marksaredesigntargets.
Average
41
MonolithicHallEffectICs EM-series
EM-1781
EM-1781isultra-smallHalleffectICsofasinglesiliconchipcomposedofHallelementandasignalprocessingIC.
OmnipolarHall
EffectSwitch
SupplyVoltage
1.6〜5.5Ｖ
HallElement
Pulse
Excitation
HighSensitivity
Bop：3mT
Output
CMOS
SMT
Shippedinpacket-tapereel(5000pcs/Reel)
Notice:Itisrequestedtoreadandaccept"IMPORTANTNOTICE"writtenonthebackofthefrontcoverofthiscatalogue.
50ms（typ.）
time
146μs（typ.）
5°
5°
0.1
0〜0.1
0.3
2.1
1.3
2.1±0.2
1.25
0.25
1
43
2
φ0.3
Sensorcenter
6
0
−
2
−
4
2
4BopS
BrpS
BopN
BrpN
−
50
−
60 50 100
VDD＝1.85V
（TYP:1.8mA）
（TYP:1.3μA）
（TYP:6.5μA）
6
5
4
3
2
1
0
−
40
−
08060402 001020
B
Bop
High
Low
t
t
t
OperatingPointTiming
B
Brp
48.8μs（typ.）
48.8μs（typ.） High
Low
t
t
t
ReleasingPointTiming
1.30
0.90
1.90
0.50
0.25
0.3
0.4
5°
5°
＋0.1
−0
0.55
IDD
IDDON
IDDOFF
IDD
IDD
VOUT
IDD
VOUT
Sensor
center
●(Forreferenceonly)LandPattern（Unit:mm)●Package（Unit:mm)
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differencesbetween
standoffofterminalsaremax.0.1mm.
Note4)Thesensorpartislocated0.4mm(typ.)
farfrommarkingsurface.
PinNo.
1
2
3
4
PinName
VDD
OUT
N.C.
VSS
Function
PowerSupply
Output
−
Ground
Note
ShorttoGround
●IDDPulseDriving（VDD=1.85V） ●SupplyVoltage
SupplyVoltage［V］
AmbientTemperature［℃］
●TemperatureDependenceofBop.Brp ●FunctionTimingChart
OperatingPoint［mT］
AmbientTemperature［℃］
ThisHalleffectICsoutputisheldasinternaldatajustbeforetheinternalcircuit
turnsOFF(IDDOFF).Andafter48.8μs,theoutputchanges. 42
•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.
b
f
j
n
o
p
EM-1781
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.
Any export of these products, or devices or systems containing them, may
require an export license or other official approval under the law and
regulations of the country of export pertaining to customs and tariffs, currency
exchange, or strategic materials.
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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notify such third party in advance of the above conten t and conditions, and th e
buyer or distributor agrees to assume any and all responsibility and liability for
and hold AKM harmless from any and all claims arising from the use of said
product in the absence of such notification.
February 21, 2013