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PDF AK8779B Data sheet ( Hoja de datos )
| Número de pieza | AK8779B | |
| Descripción | Hall Effect IC | |
| Fabricantes | AKM | |
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[AK8779B]
AK8779B
Hall Effect IC for Pulse Encoders
1. General Description
The AK8779B is a Hall effect latch which detects both “vertical” and “horizontal” (perpendicular and
parallel to the marked side of the package) magnetic fields at the same time. The OUTA and OUTB
outputs are switched according to the vertical and horizontal magnetic fields applied to the device. The
AK8779B is for use in the incremental pulse encoders or rotational detection systems.
2. Features
Supply Voltage:
Operation Temperature:
Sensitivity (Vertical):
Sensitivity (Horizontal):
Two Outputs:
Package:
3.8 to 24V
40 to 150ºC
±2.0mT(Typ.), ±4.0mT(Max.)
±2.0mT(Typ.), ±4.0mT(Max.)
OUTA (vertical magnetic field detection)
OUTB (horizontal magnetic field detection)
6-pin SOP Type (RoHS Compliant, Halogen free)
015001034-E-02
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2015/10
1 page  
[AK8779B]
7. Recommended Operating Conditions
Table 4. Recommended operating conditions
Parameter
Symbol
Supply Voltage
Output Current
Operation Temperature
VDD
ISINK
Ta
Min.
3.8
40
Typ.
12
Max.
24
15
150
Unit
V
mA
ºC
8. Electrical Characteristics
Table 5. Electrical characteristics at VDD = 3.8 to 24V, Ta = 40 to 150ºC
Parameter
Symbol Min. Typ. Max. Unit Description
Current Consumption
IDD 1.7 3.5 6.2 mA VDD = 3.8 to 24V
Current Consumption (2)
IDD2 1.7 3.5 6.0 mA VDD = 3.8 to 18V
Output Saturation Voltage VSAT
0.4 V OUTA pin, OUTB pin, ISINK = 15mA
Output Leak Current
ILEAK
10 µA OUTA, OUTB pin = VDD
Output Refresh Period
Tp 5.0 8.3 16.7 µs
9. Magnetic Characteristics
Table 6. Magnetic characteristics at VDD = 3.8 to 24V, Ta = 40 to 150ºC
Parameter
Symbol
Min. Typ.
Operate point of vertical magnetic field
BopV
0.5 2.0
Release point of vertical magnetic field
BrpV
4.0 2.0
Operate point of horizontal magnetic field
BopH
0.5 2.0
Release point of horizontal magnetic field
BrpH
4.0 2.0
Hysteresis
BhV, BhH 2.0 4.0
Magnetic offset
BoffV, BoffH 1.1 0.0
Max.
4.0
0.5
4.0
0.5
6.4
+1.1
Unit Description
mT (* 2)
mT (* 2)
mT (* 3)
mT (* 3)
mT (* 2, * 3, * 4)
mT (* 2, * 3, * 5)
* 2. Horizontal magnetic flux density is zero.
* 3. Vertical magnetic flux density is zero
* 4. Bh = Bop – Brp
* 5. Boff = (Bop + Brp) / 2
OUTA/OUTB signal
Bh/2 Bh/2
N0
Brp Boff
B
S
Bop
Figure 3. Definition of Bh and Boff
015001034-E-02
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2015/10
5 Page 
14.1. Outline Dimensions
6-pin SOP (Unit: mm)
14. Package
[AK8779B]
Figure 12. Outline Dimensions
* The center of the sensitive are is located within a φ0.3mm circle.
* Lead flatness: The standoff differences among terminals are Max. 0.1mm.
* The sensor part is located at 0.71mm (Typ.) deep from the marked surface.
14.2. Material of Terminals
Material:
Plating:
Thickness:
Cu alloy
Sn 100%
10µm (Typ.)
015001034-E-02
- 11 -
2015/10
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet AK8779B.PDF ] | |
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