BU52011HFV-TR Rohm Semiconductor, BU52011HFV-TR Datasheet - Page 13

• Manufacturer Part Number: BU52011HFV-TR
• Description: Industrial Hall Effect / Magnetic Sensors ULTRA SMALL DETECT SENSOR; 1.65-3.3V
• Manufacturer: Rohm Semiconductor
• Series: -r
• Type: Omnipolar Switchr

Specifications of BU52011HFV-TR

• Operational Type: Bipolar
• Operating Supply Voltage: 1.8 V or 2.5 V
• Current Rating: 5 uA
• Operating Point Min/max: - 5 mT to 5 mT
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Maximum Output Current: 0.5 mA
• Package / Case: HVSOF
• Hall Effect Type: Bipolar
• Output Current: 500µA
• Power Dissipation Pd: 536mW
• Sensor Case Style: HVSOF
• No. Of Pins: 5
• Supply Voltage Range: 1.65V To 3.3V
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC
• Sensing Range: ±5mT Trip, ±0.6mT Release
• Voltage - Supply: 1.65 V ~ 3.3 V
• Current - Supply: 8µA
• Current - Output (max): ±0.5mA
• Output Type: Digital, Open Collector
• Features: -
• Operating Temperature: -40°C ~ 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
(Offset Cancelation)
(Micropower Operation)
I
DD
B
GND
Fig.35
V
Startup time
×
DD
Period
Standby
Fig.34
I
＋
－
Hall Voltage
t
The bipolar detection Hall IC adopts an 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.
※BD7411G don’t adopts an intermittent operation method.
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. 35 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.
13/20
Reference period: 50ms (MAX100ms)
Reference startup time: 48μs