AK8788A [AKM]
AK8788A is ultra-small Hall effect IC of a single silicon chip composed of Hall element and a signal processing IC; AK8788A是单一硅芯片霍尔元件构成和信号处理IC的超小型霍尔效应集成电路
| 型号： | AK8788A |
| 厂家： | 
ASAHI KASEI MICROSYSTEMS |
| 描述： | AK8788A is ultra-small Hall effect IC of a single silicon chip composed of Hall element and a signal processing IC |
| 文件： | 总5页 (文件大小：148K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Monolithic Hall Effect ICsꢀAK-series
Shipped in packet-tape reel(5000pcs/Reel)
AK8788A is ultra-small Hall effect IC of a single silicon chip composed of Hall element and a signal processing IC.
AK8788A
Omnipolar Hall
Supply Voltage
Hall Element
Pulse
Excitation
High Sensitivity
Bop：3mT
Output
CMOS
SON
Effect Switch
1.6～5.5Ｖ
●Features
・High sensitive omnipoler operation
・Micropower operation
ꢀTyp.4.5μA (average : VDD=1.85V)
・Ultra small SON package : 1.1×1.4×t0.37mm
ꢀHalogen free
●Operational Characteristics
Vout
VOH
H
S or N
Package top
BhN
BhS
Package bottom
VOL
0
L
N or S
BopN BrpN
BrpS BopS
N
S
Magnetic flux density
●Functional Block Diagram
1：VDD
Item
OSC
Function
Generates operating clock
Switch
Timing logic Generates timing signal requires for Chopper SW, AMP
and COMP
4：OUT
2：VSS
Hall Element Hall element fabricated by CMOS process
Chopper SW Performs chopping in order to cancel the offset voltage
ꢀ
of Hall sensor
OSC
&
Timing Logic
Hall
Element SW
Chopper
Schmitt
Trigger
&
Output
Stage
AMP
Reduce offset voltage and amplifies Hall output voltage
AMP
Schmitt Trigger Hysteresis comparator
Latch
Output Stage CMOS output, During the power down mode, output
is latched in its previous state
31
AK8788A
•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
●Absolute Maximum Ratings
Item
symbol
Min.
Max.
Unit
VDD
IOUT
TSTG
ー0.3
ー0.5
ー55
＋6.5
＋0.5
＋125
V
Power supply voltage
Output current
Storage temperature
mA
℃
Note) Stresses beyond these listed values may cause permanent damage to the device.
●Recommended Operating Conditions
Item
symbol
Min.
Typ.
Max.
Unit
Power supply voltage
Operating temperature
VDD
Ta
1.6
1.85
5.5
V
ー40
＋85
℃
f
●Electrical Characteristics①（Ta=25℃ VDD=1.85V Unless otherwise noted）
Item
symbol
Min.
Typ.
Max.
Unit
Note
IDD
IDD2
VOH
VOL
4.5
7.5
9
μA
μA
V
Average
Current consumption
12
Average, VDD=5.5V
Iout=ー0.5mA
Iout=＋0.5mA
High level output voltage
Low level output voltage
Pulse drive period
Pulse drive time
VDDー0.4
0.4
100
170
V
TPD1
TPD2
25
43
50
ms
μs
85.4
●Electrical Characteristics②（Ta=－40℃～85℃ VDD=1.6～5.5V）
Item
symbol
Min.
Typ.
Max.
Unit
Note
Current consumption
High level output voltage
Low level output voltage
Pulse drive period
Pulse drive time
IDD
VOH
VOL
4.5
15
μA
V
VDDー0.4
Iout=ー0.5mA
Iout=＋0.5mA
k
0.4
100
170
V
TPD1
TPD2
25
43
50
ms
μs
85.4
Note) The specifications in Electrical Characteristics ② are design targets.
●Magnetic Characteristics①（Ta=25℃ VDD=1.85V）
Item
symbol
Min.
Typ.
Max.
Unit
＊
Bop
S
1.9
3.0
ー3.0
2.2
3.7
mT
mT
mT
mT
mT
Operating points
＊
B
opN
ー3.7
ー1.9
n
o
p
＊
3.4
BrpS
BrpN
1.6
Releasing points
H y s t e r e s i s
＊
ー3.4
ー2.2
0.8
ー1.6
＊
0.3
＊
1.5
BhS,BhN
Note) The characteristics with * mark are design targets.
●Magnetic Characteristics②（Ta=－40℃～85℃ VDD=1.6～5.5V）
Item
symbol
Min.
Typ.
Max.
Unit
B
opS
opN
1.7
ー4.1
1.4
3.0
ー3.0
2.2
4.1
ー1.7
3.8
mT
mT
mT
mT
mT
Operating points
B
BrpS
BrpN
Releasing points
H y s t e r e s i s
ー3.8
0.1
ー2.2
0.8
ー1.4
1.7
BhS,BhN
32
Note) The specifications in Magnetic Characteristics ② are design targets.
AK8788A
●Package（Unit:mm)
●Footprint（for reference)
0.80
0.50
0.80
1.10
Sensor Center
※Note 1) Sensitive area position referenced to
0.22
0.22±0.05
0.50±0.05
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
Pin No. Pin name
Function
Note
1
2
3
4
VDD
Power supply pin
VSS Ground pin
（No internal connection） Connect to VSS externally
OUT Output pin
N.C.
CMOS output
●IDD Timing Chart
●Functional Timing Chart
I
DD
I
DD
50ms（typ.）
85.4μs（typ.）
I
DD
I
DD ON
time
time
time
time
B
B
（typ : 1.7mA）
Bop
Brp
I
DD
（typ : 4.5μA）
Vout
High
Vout
High
12.2μs（typ.）
12.2μs（typ.）
I
DD OFF
（typ : 1.3μA）
time
Low
Low
time
time
Operating Point Timing
Releasing Point Timing
Note: Hall IC’s output is held as internal data just before the internal circuit turns off. And after
12.2μs (typ.)the output changes.
33
AK8788A
●Typical Characteristics Data (for reference)
b
6
10
9
BopS
BopN
BrpS
BrpN
VDD=1.85V
VDD=3V
4
2
VDD=5.5V
8
7
6
0
5
4
3
2
1
0
-2
-4
-6
-30 -20 -10
0
10 20 30 40 50 60 70 80 90
-30 -20 -10
0
10 20 30 40 50 60 70 80 90
Ambient Temperature Ta［℃］
Bop, Brp vs. Ta(VDD=1.85V)
Ambient Temperature Ta［℃］
IDD vs. Ta
Temperature dependence of sensitivity
Temperature dependence of current consumption（Average）
f
●Application Circuit
VDD=1.85V
CMOS Output
OUT
VDD
AK8788A
100nF
GND
VSS
N.C.
k
n
o
p
34
IMPORTANT NOTICE
These products and their 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, software and other 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 the 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
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