Datasheet > A1304ELHLX-05-T

A1304ELHLX-05-T

更新时间： 2022-02-26 13:25:17

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
10页	948K
描述
Linear Hall-Effect Sensor IC with Analog Output, Available in a Miniature, Low Profile Surface Mount Package

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A1304ELHLX-05-T 数据手册

Figure 3: De

inition of V_CCRamp Time, t_VCC

Linear Hall-Effect Sensor IC with Analog Output,

Available in a Miniature, Low Profile Surface Mount Package

A1304

and Bx are positive and negative magnetic fields, with respect to

the quiescent voltage output, such that

or decreases by a certain percentage, each characteristic also

increases or decreases by the same percentage. Error is the differ-

ence between the measured change in the supply voltage relative

to 3.3 V, and the measured change in each characteristic.

|B₍₊₎₍₂₎| > |B₍₊₎₍₁₎| and |B_(–)(2)| > |B_(–)(1)

The effective linearity error is:

The ratiometric error in quiescent voltage output, Rat_VOUT(Q)(%),

for a given supply voltage, V_CC, is defined as:

Lin_ERRmax(|Lin

| |Lin_ERR–|)

ERR+

(7)



V_OUT(Q)(VCC)/ V





^OUT(Q)(3.3V)

1–

Rat_VOUT(Q)

100 (%)

(9)





V_CC/ 3.3 (V)





The saturation of the output at V_SAT(HIGH)and V_SAT(LOW)will

limit the operating magnetic range of the applied field in which

the device provides a linear output. The maximum positive and

negative applied magnetic fields in the operating range can be

calculated:

The ratiometric error in magnetic sensitivity, Rat_Sens(%), for a

given supply voltage, V_CC, is defined as:



Sens_(VCC)/ Sens





^(3.3V)

1–

Rat_Sens

100 (%)

(10)





V_CC/ 3.3 (V)

V_SAT(HIGH)– V_OUT(Q)







B_MAX(+)



Sens

V_CCRamp Time The time taken for V_CCto ramp from 0 V to

V_CC(typ), 3.3 V (see figure 3).

V_OUT(Q)– V_SAT(LOW)

(8)



B_MAX(–)

Sens

V_CCOff Level For applications in which the VCC pin of the

A1304 is being power-cycled (for example using a multiplexer

to toggle the part on and off), the specification of V_CCOff Level,

V_CCOFF, determines how high a V_CCoff voltage can be tolerated

while still ensuring proper operation and startup of the device

(see Figure 3).

Ratiometry Error The A1304 provides ratiometric output.

This means that the Quiescent Voltage Output, V_OUT(Q), and the

magnetic sensitivity, Sens, are proportional to the supply volt-

age, V_CC. In other words, when the supply voltage increases

Output Voltage, V_OUT(V)

V_SAT(High)

t_VCC

V_CC(typ)

V_OUT(Q)

V_SAT(Low)

V_CCOFF

time

–B

Appied Magnetic Field Intensity, B (G)

Figure 2: Effect of Saturation

Allegro MicroSystems, LLC

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

1...3 4 567 8 9 10

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