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A1391_16

更新时间： 2022-02-26 13:25:24

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
16页	492K
描述
Micro Power 3 V Linear Hall Effect Sensor ICs

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A1391_16 数据手册

A1391, A1392, A1393, and A1395

Micro Power 3V Linear Hall Effect Sensor ICs

withTri-State Output and User-Selectable Sleep Mode

Features and Benefits

Description

▪ High-impedance output during sleep mode

▪ Compatible with 2.5 to 3.5 V power supplies

▪ 10 mW power consumption in the active mode

▪ Miniature MLP/DFN package

TheA139xfamilyoflinearHalleffectsensorintegratedcircuits

(ICs) provide a voltage output that is directly proportional to

an applied magnetic field. Before amplification, the sensitivity

of typical Hall effect ICs (measured in mV/G) is directly

proportional to the current flowing through the Hall effect

transducer element inside the ICs. In many applications, it

is difficult to achieve sufficient sensitivity levels with a Hall

effect sensor IC without consuming more than 3 mAof current.

The A139x minimize current consumption to less than 25 μA

throughtheadditionofauser-selectablesleepmode.Thismakes

these devices perfect for battery-operated applications such as:

cellular phones, digital cameras, and portable tools. End users

can control the current consumption of theA139x by applying a

▪ Ratiometric output scales with the ratiometric supply

reference voltage (VREF pin)

▪ Temperature-stable quiescent output voltage and

sensitivity

▪ Wide ambient temperature range: –20°C to 85°C

▪ ESD protection greater than 3 kV

▪ Solid-state reliability

▪ Preset sensitivity and offset at final test

¯¯¯¯¯¯¯¯

logic level signal to the SLEEP pin. The outputs of the devices

are not valid (high-impedance mode) during sleep mode. The

high-impedanceoutputfeatureallowstheconnectionofmultiple

A139x Hall effect devices to a single A-to-D converter input.

Package: 6 pin MLP/DFN (suffix EH)

Thequiescentoutputvoltageofthesedevicesis50%nominalof

theratiometricsupplyreferencevoltageappliedtotheVREFpin

of the device.The output voltage of the device is not ratiometric

with respect to the SUPPLY pin.

Approximate scale

Continued on the next page…

Functional Block Diagram

VREF

VCC

To all subcircuits

_Ratio/ 2

Hall Element

Regulator

R_Ratio/ 2

OUT

Amp

Gain

Out

Offset

Programming Logic

SLEEP

Circuit Reference Current

GND

1391-DS, Rev. 7

12 3 4 5 6 7...16

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