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부품번호 | AK8779A 기능 |
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기능 | Hall Effect IC | ||
제조업체 | AKM | ||
로고 | |||
[AK8779A]
AK8779A
Hall Effect IC for Pulse Encoders
1. General Description
The AK8779A is a Hall effect latch which detects both “vertical magnetic field” and “horizontal magnetic
field” (perpendicular and parallel to the marked side of the package) at the same time. The pulse output
F and the direction output D are switched according to the vertical and horizontal magnetic fields applied
to the device. The direction is calculated internally and output D is switched on a rising or falling edge of
output F. The AK8779A is for use in the incremental pulse encoders or rotational detection systems.
Supply Voltage:
Operation Temperature:
Sensitivity (Vertical):
Sensitivity (Horizontal):
Two Outputs:
Package:
2. Features
3.8 to 24V
40 to 150ºC
±2.0mT(Typ.), ±4.0mT(Max.)
±2.0mT(Typ.), ±4.0mT(Max.)
F (Pulse)
D (Direction)
6-pin SOP (RoHS Compliant, Halogen free)
015001035-E-02
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2015/07
5.1. Pin Configurations
5. Pin Configurations and Functions
Line Marking
65 4
[AK8779A]
123
Figure 2. Pin Layout
5.2. Functions
Table 2. Description of pin name and function
Pin No. Pin Name I/O Function
1 F O Output pin (relating to the pulse output)
2 TAB - (TAB pin)
3 D O Output pin (relating to the direction output)
4
VDD
- Power supply pin
5 TAB - (TAB pin)
6 VSS - Ground pin
* 1. The TAB pin should be connected to the VSS pin.
Description
Open Drain
(* 1)
Open Drain
(* 1)
6. Absolute Maximum Ratings
Table 3. Absolute maximum ratings
Parameter
Symbol
Supply Voltage
VDD
Output Voltage
VOUT
Output Current
Storage Temperature
ISINK
TSTG
Min.
0.3
0.3
55
Max.
32
32
20
150
Unit Description
V VSS = 0V
V
F pin, D pin
VSS = 0V
mA F pin, D pin
ºC
Operation at or beyond these limits may result in permanent damage to the device. Normal operation is
not guaranteed at these extremes.
015001035-E-02
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2015/07
4페이지 [AK8779A]
10.3. Behaviors of Internal and Output Signals when a Rotating Magnetic Field Is Applied on
The AK8779A
The F signal (pulse) is correspond to the result of EX-OR operation of internal signal A and B. The D
signal (direction) is calculated by status of internal signal A and B.
Vertical M. F. D.
BopV
BrpV 0
Direction changed
Direction changed
t
BopH
Horizonatal M. F. D.
BrpH 0
t
Supply voltage VDD
0
t
Internal signal A
(Vertical)
0
Internal signal B
(Horizontal)
0
F (Pulse)
0
D (Direction)
0
Undefined ("H" or "L")
F, D signal is determined.
t
t
t
t
Figure 6. Behaviors of Internal Signal A, B and Output Signal F, D with Rotating Magnetic Field
* M.F.D. = Magnetic Flux Density
* D signal is determined after one F signal pulse is sent out. The indeterminate output state appears
only in the powering up of this device.
* F and D signals are changed at the same time.
015001035-E-02
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2015/07
7페이지 | |||
구 성 | 총 13 페이지수 | ||
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부품번호 | 상세설명 및 기능 | 제조사 |
AK8779A | Hall Effect IC | AKM |
AK8779B | Hall Effect IC | AKM |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |