Datasheet > BU52075GWZ

BU52075GWZ

更新时间： 2023-09-03 20:25:20

品牌	Logo	应用领域
罗姆 - ROHM		手机摄像机智能手机电脑
页数	文件大小	规格书
19页	1345K
描述
双极检测（极性判别输出）霍尔IC BU52075GWZ内置极性判别电路，具备S极用和N极用2种输出，因此可通过输出逻辑的组合进行极性判别。若使用双极检测（极性判别输出）霍尔IC，则可进行平板电脑、智能手机等的盖开闭检测、以及数码摄像机等的液晶屏的正反检测和旋转方向检测。

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BU52075GWZ 数据手册

BU52075GWZ

Description of Operations

Micropower Operation (Small Current Consumption Using Intermittent Sensing)

The dual output omnipolar detection Hall IC uses

I_DD

intermittent sensing save energy. At startup the Hall

elements, amplifier, 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.

Period 50ms

Startup Time

Standby Time

Reference Period: 50ms (MAX100ms)

Reference Startup Time: 48µs

Figure 12

(Offset Cancellation)

V_DD

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 the Hall elements are connected as shown in Figure

13 and a magnetic field is applied perpendicular to the Hall

elements, a voltage is generated at the mid-point terminal of

the bridge. This is known as Hall voltage.

＋

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.

－

GND

Figure 13

www.rohm.com

TSZ02201-0M2M0F414030-1-2

7/16

TSZ22111 • 15 • 001

17.Oct.2014 Rev.001

1...4 5 678 9 10...19

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