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Datasheet
Omnipolar Detection Hall IC
(Dual Outputs for both S and N Pole Polarity Detection)
BU52078GWZ
General Description
The BU52078GWZ is omnipolar Hall IC incorporating a
polarity determination circuit that enables separate
operation (output) of both the South and North poles.
This Hall IC product can be in tablets, smart phones, and
other applications in order to detect open and close of
the cover.
And this Hall IC product can be in digital video cameras
and other applications involving display panels in order to
detect the front/back location or determine the rotational
direction of the panel.
Features
Omnipolar Detection (Polarity Detection for both S
and N Poles with Separate, Dual Outputs)
Micro Power Operation (Small Current Using
Intermittent Operation Method)
Ultra-compact CSP4 Package (UCSP35L1)
Polarity Judgment and Separate Output on both
Poles
(OUT1=S-pole Output; OUT2=N-pole Output)
Key Specifications
VDD Voltage Range:
Operate Point:
Hysteresis:
Period:
Supply Current (AVG):
Output Type:
Operating Temperature Range:
1.65V to 3.6V
±24.0mT(Typ)
1.6mT(Typ)
50ms(Typ)
5.0µA (Typ)
CMOS
-40°C to +85°C
Package
UCSP35L1
W(Typ) x D(Typ) x H(Max)
0.80mm x 0.80mm x 0.40mm
Applications
Tablets, Smart Phones, Notebook Computers,
Digital Video Cameras, Digital Still Cameras, etc.
Typical Application Circuit, Block Diagram, Pin Configurations and Pin Descriptions
HALL
ELEMENT
×
VDD
B1
TIMING
LOGIC
B2 OUT1
GND
VDD
0.1µF
Adjust the bypass capacitor value
as necessary, according to voltage
noise conditions, etc.
The CMOS output terminals
enable direct connection to
the PC, with no external
pull-up resistor required.
A2 OUT2
Pin No.
A1
A2
B1
B2
A1
Pin Name
GND
OUT2
VDD
OUT1
Function
Ground
Output (React to the north pole)
Power supply
Output (React to the south pole)
GND
(TOP VIEW)
A1 A2
(BOTTOM VIEW)
A2 A1
B1 B2
B2 B1
Product structure : Silicon monolithic integrated circuit
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© 2015 ROHM Co., Ltd. All rights reserved.
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This product has no designed protection against radioactive rays
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BU52078GWZ
Contents
General Description ........................................................................................................................................................................1
Features..........................................................................................................................................................................................1
Applications ....................................................................................................................................................................................1
Key Specifications ..........................................................................................................................................................................1
Package..........................................................................................................................................................................................1
Typical Application Circuit, Block Diagram, Pin Configurations and Pin Descriptions .....................................................................1
Absolute Maximum Ratings ............................................................................................................................................................3
Recommended Operating Conditions.............................................................................................................................................3
Magnetic, Electrical Characteristics ................................................................................................................................................3
Measurement Circuit.......................................................................................................................................................................4
Typical Performance Curves...........................................................................................................................................................4
Figure 6. Operate Point, Release Point vs Ambient Temperature ...............................................................................................5
Figure 7. Operate Point, Release Point vs Supply Voltage .........................................................................................................5
Figure 8. Period vs Ambient Temperature ...................................................................................................................................5
Figure 9. Period vs Supply Voltage .............................................................................................................................................5
Figure 10. Supply Current vs Ambient Temperature....................................................................................................................6
Figure 11. Supply Current vs Supply Voltage ..............................................................................................................................6
Description of Operations ...............................................................................................................................................................7
Intermittent Operation at Power ON..............................................................................................................................................10
Magnet Selection ..........................................................................................................................................................................10
Slide-by Position Sensing ............................................................................................................................................................. 11
Position of the Hall Element.......................................................................................................................................................... 11
Footprint Dimensions.................................................................................................................................................................... 11
I/O Equivalence Circuit ................................................................................................................................................................. 11
Operational Notes.........................................................................................................................................................................12
Ordering Information.....................................................................................................................................................................14
Marking Diagrams.........................................................................................................................................................................14
Physical Dimension, Tape and Reel Information...........................................................................................................................15
Revision History............................................................................................................................................................................16
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BU52078GWZ
Absolute Maximum Ratings (Ta = 25°C)
Parameter
Symbol
Power Supply Voltage
VDD
Output Current
IOUT
Power Dissipation
Pd
Rating
-0.1 to +4.5 (Note 1)
±0.5
0.1 (Note 2)
Unit
V
mA
W
Operating Temperature Range
Topr
-40 to +85
°C
Storage Temperature Range
Tstg
-40 to +125
°C
(Note 1) Not to exceed Pd
(Note 2) Mounted on 24mm x 20mm x 1.6mm glass epoxy board. Reduce 1.00mW per 1°C above 25°C.
Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over
the absolute maximum ratings.
Recommended Operating Conditions (Ta= -40°C to +85°C)
Parameter
Symbol
Min
Typ
Max Unit
Power Supply Voltage
VDD 1.65 1.80 3.60 V
Magnetic, Electrical Characteristics (Unless otherwise specified VDD=1.80V Ta=25°C)
Parameter
Symbol
Min
Typ
Max Unit
Conditions
Operate Point
Release Point
BopS
- 24.0 30.0
Output: OUT1
(React to the south pole)
BopN
-30.0
-24.0
-
mT Output: OUT2
(React to the north pole)
BrpS 16.4 22.4
-
Output: OUT1
(React to the south pole)
BrpN
-
-22.4
-16.4
mT Output: OUT2
(React to the north pole)
Hysteresis
BhysS - 1.6 -
mT
BhysN
-
1.6
-
Period
Output High Voltage
Output Low Voltage
Tp - 50 100 ms
VOH
VDD
-0.2
-
-
V
BrpN<B<BrpS (Note 3)
IOUT=-0.5mA
VOL -
-
0.2
V
B<BopN, BopS<B (Note 3)
IOUT=+0.5mA
Supply Current
IDD(AVG)
-
5
8 µA Average
Supply Current During Startup
Time
IDD(EN)
-
2.8
- mA During startup time value
Supply Current During Standby
Time
IDD(DIS)
-
1.8
- µA During standby time value
(Note 3) B = Magnetic Flux Density
1mT=10Gauss
Positive (+) polarity flux is defined as the magnetic flux from south pole which is direct toward to the branded face of the sensor.
After applying power supply, it takes one cycle of period (TP) to become definite output.
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BU52078GWZ
Measurement Circuit
Bop/Brp
VDD 100µF
VDD
OUT1
/OUT2
GND
V
Tp 200
VDD
Oscilloscope
VDD
OUT1
/OUT2
GND
Bop and Brp are measured by applying an external magnetic
field
Figure 1. Bop,Brp Measurement Circuit
The period is monitored by an oscilloscope
Figure 2. Tp Measurement Circuit
VOH
VDD
100µF
VDD
OUT1
/OUT2
GND
V
IOUT
Figure 3. VOH Measurement Circuit
VOL
VDD
100µF
VDD
OUT1
/OUT2
GND
V
Figure 4. VOL Measurement Circuit
IDD
A
VDD
VDD
2200µF
OUT1
/OUT2
GND
Figure 5. IDD Measurement Circuit
IOUT
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Typical Performance Curves
30.0
20.0
10.0
VDD=1.8V
Bop S
Brp S
0.0
-10.0
-20.0
Brp N
Bop N
-30.0
-60 -40 -20 0 20 40 60 80 100
Ambient Temperature [°C]
Figure 6. Operate Point, Release Point vs Ambient
Temperature
30.0
Ta = 25°C
20.0
10.0
Bop S
Brp S
0.0
-10.0
-20.0
Brp N
Bop N
-30.0
1.4 1.8 2.2 2.6 3.0 3.4 3.8
Supply Voltage V
Figure 7. Operate Point, Release Point vs Supply Voltage
100
90 VDD=1.8V
80
70
60
50
40
30
20
10
0
-60
-40 -20 0 20 40 60
Ambient Temperature [°C]
80 100
Figure 8. Period vs Ambient Temperature
100
90
80
70
60
50
40
30
20
10
0
1.4
Ta = 25°C
1.8 2.2 2.6 3.0 3.4
Supply Voltage [V]
3.8
Figure 9. Period vs Supply Voltage
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© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
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TSZ02201-0M2M0F415030-1-2
24.Aug.2015 Rev.001