MonolithicHallEffectICs AK-series
AK8771
BipolarHall
EffectLatch
SupplyVoltage
1.6〜5.5Ｖ
UltraHigh
Sensitivity
Bop：1.8mT
Output
CMOS
SON
Powerdown
Function
AK8771isultra-smallHalleffectICofasinglesiliconchipcomposedofHallelementandasignalprocessingIC.
Shippedinpacket-tapereel(5000pcs/Reel)
4：OUT
1：VDD
3：PDN
Switch
Dynamic
OffsetCancellation
Output
Stage
Latch
Logic
AMP
Chopper
SW
Hall
Element
OSC
&
TimingLogic
Schmitt
Trigger
&
Latch
2：VSS
●FunctionalBlockDiagram
●OperationalCharacteristics
●Features
・PrecisionBipolarHallEffectLatch
・Powermanageabilitythrough"PDN"pin
 CurrentconsumptioninPowerdownmodeis
 lessthan1μA
・UltrasmallSONpackage:1.1×1.4×t0.37mm,
 Halogenfree
SorN
NorS
Packagetop
Packagebottom
Magneticfluxdensity
SN
0
H
BopBrp
Bh
VoH
VOL
L
Vout
Item
OSC
Timinglogic

HallElement
ChopperSW
 
AMP
SchmittTrigger
OutputStage
Generatesoperatingclock
GeneratestimingsignalrequiresforChopperSW,AMP
andCOMP
HallelementfabricatedbyCMOSprocess
Performschoppinginordertocanceltheoffsetvoltage
ofHallsensor
ReduceoffsetvoltageandamplifiesHalloutputvoltage
Hysteresiscomparator
CMOSoutput,Duringthepowerdownmode,output
islatchedinitspreviousstate
Function
Notice:Itisrequestedtoreadandaccept"IMPORTANTNOTICE"writtenonthebackofthefrontcoverofthiscatalogue.
15
AK8771
•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.
c
g
k
n
●AbsoluteMaximumRatings
●RecommendedOperatingConditions
●ElectricalCharacteristics（Ta=25℃VDD=3.0V）
●MagneticCharacteristics①（Ta=25℃VDD=3.0V）
●MagneticCharacteristics②（Ta=−30℃〜85℃VDD=1.6〜5.5V）
VDD
IOUT
VIN
IIN
TSTG
Item
Min.
Unit
Note
symbol
＋6.5
＋0.5
VDD＋0.3＊
＋10
＋125
ー0.3
ー0.5
ー0.3
ー10
ー55
V
mA
V
mA
℃
OUTpin
PDNpin
PDNpin
Max.
Storagetemperature
VDD
Ta
Item
Typ.
Unit
symbol
5.5
＋85
3.0
Min.
1.6
ー30
V
℃
Max.
IDD1
IDD2
IIN
VIH
VIL
VOH
VOL
TPD1
TPD2
Item
Typ.
Unit
symbol
1
6
1
0.3
0.4
100
100
2.5
Min.
ー1
0.7VDD
VDDー0.4
μA
mA
μA
V
V
V
V
μs
μs
Note
PDN=0V
PDN=VDD
Iout=ー0.5mA
Iout=＋0.5mA
Active→PDN
PDN→Active
Max.
Bop
Brp
Bh
Item
Typ.
Unit
symbol
4.01.8
ー1.8
3.6
Min.
ー4.0
mT
mT
mT
Max.
Bop
Brp
Bh
Item
Typ.
Unit
symbol
4.21.8
ー1.8
3.6
Min.
ー4.2
mT
mT
mT
Max.
Outputcurrent
Input voltage
Input current
Power supply voltage
Operating temperature
Power supply voltage
Current consumption 2
PDNInputcurrent
PDNinputHvoltage
PDN input L voltage
High Level output voltage
Lowleveloutputvoltage
PDN mode transition time 1
PDN mode transition time 2
Current consumption 1
Releasing point
Hysteresis
Operating point
Releasing point
Hysteresis
Operating point
Note)ThespecificationsinMagneticCharacteristics②aredesigntargets.
＊)Lessthan+6.5V.
Note)Stressbeyondtheselistedvaluesmaycausepermanentdamagetothedevice.
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p
16
AK8771
●Package（Unit:mm)
※Note1)Sensitiveareapositionreferencedto
thecenterofpackagewithinφ0.3mmcircle.
 Note2)Tolerancesofdimensionotherwisenotedis
±0.05mm.
 Note3)Hatchedareaisplated.
 Note4)Centerpadarea(TAB)shouldbetiedtothe
VSSorfloating
No.
1
2
3
4
Pinname
VDD
VSS
PDN
OUT
Function
Powersupplypin
Groundpin
Powerdownpin.
H:Deviceactive
L:Devicepowerdown
Outputpin
Note
CMOSInput.Thispinhastobe
tiedtoHlevelwhenexternal
powercontrolisnotused.
CMOSOutput
●FunctionTimingChart ●ApplicationCircuit
CMOSOutput
GND
VDD=3.0V
100nF
CMOSInput
VDD
PDN
VSS
AK8771
OUT
Bop
Brp
VPDN［V］
VOUT［V］
IDD［mA］
B［mT］
Undefined
T
PD2
（＜100μs）
t
t
t
t
0
N
0
0
0
S
Note1)Duringpowerdownmode,outputislatchedinits
previousstate.
Note2)WhenVDDissupplied,thetimefromreachingVDD=1.6V
totheupdateoftheoutputstateisequaltoTPD2.
T
PD2
（＜100μs）
T
PD1
（＜100μs）T
PD1
（＜100μs）
FunctionalTiming
●Footprint（forreference)
1.10 0.80
0.50
0.22
0.60
1.40
1.70
0.35±0.10
0.22±0.05
0.50±0.05
1.00
(0.125)
0.37
(0.23)
0.20
1.40
!
" "
!
0.80
0.60
SensorCenter
17
AK8771
●TypicalCharacteristicData（forreference）
-30 -20 -10 0 10 20 30 40 50 60 70 80 90
0
-1
-2
-3
-4
1
2
3
4
0
-1
-2
-3
-4
1
2
3
4
Bop
-30-20-10 0 102030405060708090
Brp
Bop,Brp［mT］
Bop,Brp［mT］
AmbientTemperatureTa［℃］
Bop,Brpvs.Ta(VDD=1.6V)
AmbientTemperatureTa［℃］
Bop,Brpvs.Ta(VDD=3.0V)
-30 -20 -10 0 10 20 30 40 50 60 70 80 90
0
-1
-2
-3
-4
1
2
3
4
0
-1
-2
-3
-4
1
2
3
4
Bop
-30-20-10 0 102030405060708090
Brp
Bop,Brp［mT］
Bop,Brp［mT］
AmbientTemperatureTa［℃］
Bop,Brpvs.Ta(VDD=2.0V)
AmbientTemperatureTa［℃］
Bop,Brpvs.Ta(VDD=5.5V)
IDD2［mA］
IDD2［mA］
AmbientTemperatureTa［℃］
IDD2vs.Ta(invariousVDD)
VDD［V］
IDD2vs.VDDTa(invariousTa)
Bop
Brp
Bop
Brp
c
g
k
n
o
p
-30 -20 -10 0 10 20 30 40 50 60 70 80 90
0
1
2
3
4
5
0
1
2
3
4
5
123456
VDD=5.5V
VDD=3.0V
VDD=2.0V
VDD=1.6V
85℃
25℃
0℃
-30℃
18
IMPORTANT NOTICE
These products and thei r specifications are subject to change with out 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 st atus 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
distributes, disposes of, or otherwise places the product with a third party, to
notify such third party in advance of the above content and conditions, and
the 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.
April 4, 2012