BU52004GUL-E2 Rohm Semiconductor, BU52004GUL-E2 Datasheet - Page 6

• Manufacturer Part Number: BU52004GUL-E2
• Description: Board Mount Hall Effect / Magnetic Sensors Magnetic Sensor 2.4-3.3V; 50mS
• Manufacturer: Rohm Semiconductor

Specifications of BU52004GUL-E2

• Operational Type: Monolithic
• Operating Supply Voltage: 3 V
• Supply Current: 8 uA
• Package / Case: VCSP
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Supply Voltage (min): 2.4 V
• Supply Voltage (max): 3.3 V
• Maximum Output Current: 1 mA
• Hall Effect Type: Bipolar
• Output Current: 1mA
• Power Dissipation Pd: 420mW
• Sensor Case Style: VCSP50L1
• No. Of Pins: 4
• Supply Voltage Range: 2.4V To 3.3V
• Operating Temperature Range: -40°C To +85°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

● Description of Operations
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BU52004GUL, BU52014HFV
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(Magnetic Field Detection Mechanism)
(Offset Cancelation)
Micropower Operation (Small current using intermittent action)
I
DD
B
The Hall IC cannot detect magnetic fields that run horizontal to the package top layer.
Be certain to configure the Hall IC so that the magnetic field is perpendicular to the top layer.
GND
Fig.21
V
Startup time
×
DD
Period 50ms
Standby
Fig.20
S
N
I
Flux direction
S
＋
－
Hall Voltage
t
The dual output bipolar detection Hall IC
intermittent operation method to save energy. At startup, the
Hall elements, amp, comparator and other detection circuits
power ON and magnetic detection begins. During standby,
the detection circuits power OFF, thereby reducing current
consumption. The detection results are held while standby
is active, and then output.
The Hall elements form an equivalent Wheatstone (resistor)
bridge circuit. Offset voltage may be generated by a
differential in this bridge resistance, or can arise from
changes in resistance due to package or bonding stress. A
dynamic offset cancellation circuit is employed to cancel this
offset voltage.
When Hall elements are connected as shown in Fig. 21 and a
magnetic field is applied perpendicular to the Hall elements,
voltage is generated at the mid-point terminal of the bridge.
This is known as Hall voltage.
Dynamic cancellation switches the wiring (shown in the
figure) to redirect the current flow to a 90˚ angle from its
original path, and thereby cancels the Hall voltage.
The magnetic signal (only) is maintained in the sample/hold
circuit during the offset cancellation process and then
released.
Fig.22
6/11
Reference period: 50ms (MAX100ms)
Reference startup time: 48μs
S
S
N
Flux direction
N
adopts an
Technical Note
2010.01 - Rev.D