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PDF BU52274NUZ Data sheet ( Hoja de datos )
| Número de pieza | BU52274NUZ | |
| Descripción | Omnipolar Detection Hall IC | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
Omnipolar Detection Hall IC
(Dual Outputs for both S and N Pole Polarity Detection)
BU52274NUZ
General Description
The BU52274NUZ 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-small Outline Package
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
±6.3mT(Typ)
0.9mT(Typ)
50ms(Typ)
4.4µA (Typ)
CMOS
-40°C to +85°C
Package
VSON04Z1114A
W(Typ) x D(Typ) x H(Max)
1.10mm x 1.40mm x 0.40mm
Applications
Tablets, Smart Phones, Notebook Computers,
Digital Video Cameras, Digital Still Cameras, etc.
Typical Application Circuit, and Block Diagram
HALL
ELEMENT
×
VDD
1
TIMING
LOGIC
3 OUT1
GND
VDD
0.1µF
Adjust the bypass capacitor value
as necessary, according to voltage
noise conditions, etc.
4 OUT2
2
GND
Pin Descriptions
Pin Configurations
Pin No. Pin Name
Function
1 VDD Power supply
2
GND
Ground
3 OUT1 Output (Detect the south pole)
4 OUT2 Output (Detect the north pole)
(TOP VIEW)
VDD OUT2
14
(BOTTOM VIEW)
OUT2 VDD
41
23
GND OUT1
32
OUT1 GND
〇Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
〇This product has no designed protection against radioactive rays
1/16
TSZ02201-0M2M0F415150-1-2
24.May.2016 Rev.002
1 page  
BU52274NUZ
Measurement Circuit
Bop/Brp
VDD 100µF
VDD
OUT1
/OUT2
GND
V
Tp 200Ω
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,VOL
VDD
100µF
VDD
OUT1
/OUT2
GND
V
Figure 3. VOH ,VOL Measurement Circuit
IOUT
IDD
A
VDD
VDD
2200µF
OUT1
/OUT2
GND
Figure 4. IDD Measurement Circuit
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
5/16
TSZ02201-0M2M0F415150-1-2
24.May.2016 Rev.002
5 Page 
BU52274NUZ
Intermittent Operation at Power ON
Power ON
VDD 1.65V
Supply Current
(Intermittent Action)
OUT
Startup Time
Standby Time
Standby Time
Indefinite
Interval
High（Not detected Magnetic Field）
Low（Detected Magnetic Field）
Figure 16
The dual output omnipolar detection Hall IC adopts an intermittent operation method in detecting the magnetic field during
startup, as shown in Figure 16. The IC outputs to the appropriate terminal based on the detection result and maintains the
output condition during the standby period. The time from power ON until the end of the initial startup period is an indefinite
interval, but it cannot exceed the maximum period of 100ms. To accommodate the system design, the Hall IC output read
should be programmed within 100ms of power ON, but after the time allowed for the period, ambient temperature, and
supply voltage.
Magnet Selection
Neodymium and ferrite are major permanent magnets. Neodymium generally offers greater magnetic power per volume than
ferrite, thereby enabling miniaturization of magnet. The larger neodymium magnet is, the stronger magnetic flux density is.
And the farther detection distance is, the weaker it is. Therefore the proper size and detection distance of the magnet should
be determined according to the sensitivity of Hall IC. To increase the magnet’s detection distance, the magnet which is
thicker or larger sectional area is used.
Position of the Hall Element
(Reference)
0.55
0.7
0.175
(UNIT: mm)
Figure 17
I/O Equivalence Circuit
OUT1, OUT2
VDD
OUT1
OUT2
GND
Figure 18
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
11/16
TSZ02201-0M2M0F415150-1-2
24.May.2016 Rev.002
11 Page | ||
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