A3507LUA [ALLEGRO]

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION; 比例，线性霍尔效应传感器，高温作业


型号：	A3507LUA
厂家：	ALLEGRO MICROSYSTEMS
描述：	RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION 比例，线性霍尔效应传感器，高温作业传感器换能器
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中文：	中文翻译
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3508 ^AND

3507

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS

FOR HIGH-TEMPERATURE OPERATION

The A3507– and A3508– are sensitive, temperature-stable linear

Hall-effect sensors. Ratiometric, linear Hall-effect sensors provide a

voltage output that is proportional to the applied magnetic field and have

a quiescent output voltage that is approximately 50% of the supply

voltage. These magnetic sensors are ideal for use in linear and rotary

position sensing systems in the harsh environments of automotive and

industrial applications over extended temperatures to -40°C and +150°C.

The two devices are similar except for temperature stability over the

operating temperature range. See the Magnetic Characteristics table for

complete, individual device parametrics.

Each monolithic circuit integrates a quadratic Hall element, im-

proved temperature compensating circuitry to reduce the intrinsic

sensitivity drift of the Hall element, a small-signal high-gain amplifier,

and a rail-to-rail low-impedance output stage. Many problems normally

associated with low-level analog signals are minimized by having the

Hall element and amplifier in a single chip. Output precision is obtained

by internal gain and offset trim adjustments during the manufacturing

process.

The first character of the part number suffix determines the device

operating temperature range: suffix ‘S–’ is for -20°C to +85°C, suffix

‘E–’ is for -40°C to +85°C, and suffix ‘L–’ is for -40°C to +150°C.

These devices are supplied in a 3-pin ultra-mini-SIP ‘–UA’ package.

Dwg. PH-006

Pinning is shown viewed from branded side.

FEATURES

ABSOLUTE MAXIMUM RATINGS

I Output Voltage Proportional to Applied Magnetic Field

I Ratiometric Rail-to-Rail Output

I Improved Sensitivity

Supply Voltage, V_CC. . . . . . . . . . . . 6.0 V

Output Voltage, V_O. . . . . . . . . . . . . 6.0 V

Output Sink Current, I_O. . . . . . . . 5.0 mA

Magnetic Flux Density, B . . . . Unlimited

Package Power Dissipation,

I Superior Temperature Stability

I 4.5 V to 5.5 V Operation

I Small Package Size

P_D. . . . . . . . . . . . . . . . . . . . See Graph

Operating Temperature Range, T_A

I Solid-State Reliability

Suffix ‘S–’ . . . . . . . . . . . . -20°C to +85°C

Suffix ‘E–’ . . . . . . . . . . . . -40°C to +85°C

Suffix ‘L–’ . . . . . . . . . . . -40°C to +150°C

Storage Temperature Range,

T_S. . . . . . . . . . . . . . . -65°C to +170°C

Always order by complete part number, e.g., A3507EUA .

3507 AND 3508

RATIOMETRIC,

LINEAR HALL-EFFECT SENSORS

FOR HIGH-TEMP. OPERATION

700

600

500

400

300

FUNCTIONAL BLOCK DIAGRAM

"U" PACKAGE

θJA = 183°C/W

OUTPUT

GROUND

"UA" PACKAGE

θJA = 206°C/W

200

100

Dwg. FH-011

100

120

140

160

AMBIENT TEMPERATURE in °C

Dwg. GH-046A

ELECTRICAL CHARACTERISTICS over operating temperature range, at V_CC= 5 V (unless otherwise

noted).

Limits

Characteristic

Supply Voltage

Supply Current

Symbol

V_CC

Test Conditions

Min.

4.5

–

Typ. Max. Units

Operating

5.0

–

5.5

3.0

3.2

–

I_CC

B = 0, V_CC= 5.5 V, I_O= 0

B = 0, I_O= 1 mA, T_A= 25°C

B = 0, I_O= 1 mA

Quiescent

Voltage Output

V_OQ

2.0

1.8

4.5

–

2.5

4.8

0.2

–

Output Voltage

V_OH

V_OL

r_O

B = +X^*, I_O= 1 mA

B = -X^*, I_O= -1 mA

0.5

–

Bandwidth (-3 dB)

Output Resistance

–

kHz

Ω

2.5

125

–

Wide-Band

e_o

B = 0, BW = 10 Hz to 10 kHz,

–

µV

Output Noise

T_A= 25°C

Negative current is defined as coming out of (sourcing) the output.

* This test requires positive and negative fields sufficient to swing the output driver between fully OFF and saturated (ON), respec-

tively. It is NOT intended to indicate a range of linear operation.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

3507 AND 3508

RATIOMETRIC,

LINEAR HALL-EFFECT SENSORS

FOR HIGH-TEMP. OPERATION

MAGNETIC CHARACTERISTICS over operating temperature range, at V_CC= 5 V, I_O= 1 mA

(unless otherwise noted).

Part Numbers

A3507EUA

A3507LUA

A3508SUA

Typ. Max.

Characteristic^*

Min.

-40

2.0

1.7

-5.0

-8.8

–

Typ. Max. Min.

Typ. Max.

Min.

-20

2.0

1.7

-10

–

Units

°C

Operating Temp. Range, T_A

Sensitivity at T_A= 25°C

over Oper. Temp. Range

∆Sens_(∆T)^†at T_A= Max.

at T_A= Min.

–

+150

3.0

3.3

6.2

–

-40

2.0

1.7

-6.3

-8.8

–

+85

3.0

3.3

8.7

6.2

–

+85

3.0

3.3

–

2.5

-1.3

–

2.5

1.2

-1.3

–

2.5

–

mV/G

–

‡

∆V_OQ(∆T)

–

Ratiometry, ∆V_OQ(∆V)

Ratiometry, ∆Sens_(∆V)

Positive Linearity, Lin+

Negative Linearity, Lin–

Symmetry

–

100

–

100

–

100

–

Magnetic flux density is measured at most sensitive area of device located 0.018" (0.46 mm) below the branded face of the “UA”

package.

* See Characteristics Definitions for test conditions.

† The nominal sensitivity temperature stability is designed to compensate for the temperature coefficient of samarium-cobalt

magnets (-0.02%/°C).

‡ This calculation (formula 1, next page) yields the device’s equivalent accuracy, over the operating temperature range, in gauss.

www.allegromicro.com

3507 AND 3508

RATIOMETRIC,

LINEAR HALL-EFFECT SENSORS

FOR HIGH-TEMP. OPERATION

CHARACTERISTICS DEFINITIONS

Quiescent Voltage Output. In the quiescent state (no mag-

netic field), the output is ideally equal to one-half of the supply

voltage over the operating voltage and temperature range (V_OQ

∪ V_CC/2). Due to internal component tolerances and thermal

considerations, there is a tolerance on the quiescent voltage

output and on the quiescent voltage output as a function of

supply voltage and ambient temperature. For purposes of

specification, the quiescent voltage output as a function of

temperature is defined as

Ratiometry. The A3507– and A3508– feature a ratiometric

output. The quiescent voltage output and sensitivity are

proportional to the supply voltage (ratiometric).

The per cent ratiometric change in the quiescent voltage

output is defined as

V_OQ(VCC)/ V_OQ(5V)

∆V_OQ(∆V)

x 100%

(4)

V_CC/ 5 V

V_OQ(TA)– V_OQ(25°C)

and the per cent ratiometric change in sensitivity is defined as

∆V_OQ(∆T)

(1)

Sens_(25°C)

Sens_(VCC)/ Sens_(5V)

This calculation yields the device’s equivalent accuracy,

over the operating temperature range, in gauss.

∆Sens_(∆V)

x 100%

(5)

V_CC/ 5 V

Sensitivity. The presence of a south-pole magnetic field

perpendicular to the package face (the branded surface) will

increase the output voltage from its quiescent value toward the

supply voltage rail by an amount proportional to the magnetic

field applied. Conversely, the application of a north pole will

decrease the output voltage from its quiescent value. This

proportionality is specified as the sensitivity of the device and

is defined as

Linearity and Symmetry. The on-chip output stage is de-

signed to provide a linear output to within 500 mV of either rail

with a supply voltage of 5 V. This is equivalent to approxi-

mately 800 gauss of ambient field. Although application of

stronger magnetic fields will not damage these devices, it will

force the output into a non-linear region. Linearity in per cent

is measured and defined as

V_O(500G)– V_OQ

Lin+ =

Lin– =

x 100%

(6)

(7)

V_O(500G)– V_O(-500G)

2 (V_O(250G)– V_OQ

)

Sens =

(2)

1000 G

V_O(-500G)– V_OQ

2 (V_O(-250G)– V_OQ

The stability of sensitivity as a function of temperature is

defined as

)

and output symmetry as

Sym =

Sens_(TA)– Sens_(25°C)

Sens_(25°C)

∆Sens_(∆T)

x 100%

(3)

V_O(500G)– V_OQ

V_OQ– V_O(-500G)

x 100%

(8)

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

3507 AND 3508

RATIOMETRIC,

LINEAR HALL-EFFECT SENSORS

FOR HIGH-TEMP. OPERATION

APPLICATIONS INFORMATION

SENSOR LOCATION

Calibrated linear Hall devices, which can be used to

determine the actual flux density presented to the sensor in a

particular application, are available.

ACTIVE AREA DEPTH

0.018"

0.082"

0.46 mm

2.07 mm

NOM

0.055"

1.40 mm

For safe, reliable operation, the output should not be

pulled above the supply voltage or pulled below the device

ground.

For optimum performance, a 100 pF capacitor between

the output and ground should be added.

BRANDED

SURFACE

The nominal sensitivity is factory set to compensate for

the temperature coefficient of samarium-cobalt magnets

(-0.02%/°C).

Dwg. MH-011-6A

The ratiometric feature is especially valuable when these

devices are used with an analog-to-digital converter. A/D

converters typically derive their LSB step size by ratioing off a

reference voltage line. If the reference voltage varies, the LSB

will vary proportionally. This is a major error source in many

sensing systems. The A3507/08– can eliminate this source of

error by their ratiometric operation. Because their gain and

offsets are proportional to the supply voltage, if they are

powered from the A/D reference voltage, the sensor output

voltage will track changes in the LSB value.

TYPICAL CURRENT-SENSING APPLICATION

B ≈ N x 6.9 G/A

Hall-effect applications information is available in the

application note “Linear Hall-Effect Sensors” (AN 27702),

which can be found in the latest issue of Allegro Electronic

Data Book, AMS-702, or at

www.allegromicro.com

Dwg. AH-005A

www.allegromicro.com

3507 AND 3508

RATIOMETRIC,

LINEAR HALL-EFFECT SENSORS

FOR HIGH-TEMP. OPERATION

TYPICAL POSITION-SENSING APPLICATIONS

(Alnico 8, dimensions in inches)

VCC

0.21

SENSOR DEPTH

BELOW PACKAGE FACE

VOQ

0.19

VOQ

0.5

GND

0.10

0.1

0.2

0.3

0.4

-0.06

-0.04

0.04

0.06

0.08

-0.10

-0.08

RELATIVE DISTANCE (TOTAL EFFECTIVE AIR GAP)

RELATIVE DISTANCE

Dwg. GH-047

Dwg. GH-049

VCC

EFFECTIVE

AIR GAP

0.19

EFFECTIVE AIR GAP = 0.050

EFFECTIVE AIR GAP = 0.075

0.21

VOQ

EFFECTIVE AIR GAP = 0.095

VOQ

0.25

GND

-0.4

-0.2

0.2

0.4

0.05

0.10

0.15

0.20

RELATIVE DISTANCE

Dwg. GH-048

Dwg. GH-050

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

3507 AND 3508

RATIOMETRIC,

LINEAR HALL-EFFECT SENSORS

FOR HIGH-TEMP. OPERATION

Dimensions in Inches

Dimensions in Millimeters

(controlling dimensions)

(for reference only)

0.164

0.159

4.17

4.04

0.062

0.058

1.57

1.47

45°

0.122

0.117

3.10

2.97

45°

0.031

0.79

0.085

MAX

2.16

MAX

0.640

0.600

0.0173

0.0138

16.26

15.24

0.44

0.35

0.0189

0.0142

0.48

0.36

SEE NOTE

0.050

BSC

1.27

BSC

Dwg. MH-014E in

Dwg. MH-014E mm

NOTES: 1. Tolerances on package height and width represent allowable mold offsets Dimensions given are

measured at the widest point (parting line).

2. Exact body and lead configuration at vendor’s option within limits shown.

3. Height does not include mold gate flash.

4. Recommended minimum PWB hole diameter to clear transition area is 0.035" (0.89 mm).

5. Where no tolerance is specified, dimension is nominal.

www.allegromicro.com

3507 AND 3508

RATIOMETRIC,

LINEAR HALL-EFFECT SENSORS

FOR HIGH-TEMP. OPERATION

HALL-EFFECT SENSORS

Partial Part Avail. Oper.

Characteristics at T = +25°C

Number

Temp.

Features

Notes

OP(max)

RP(min)

hys(typ)

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS

3503

3507

3508

3515

3516

3517

3518

E/L

L/S

typ. 1.3 mV/G

typ. 2.5 mV/G

typ. 5.0 mV/G

typ. 2.5 mV/G

typ. 5.0 mV/G

typ. 2.5 mV/G

chopper stabilized

GEARTOOTH/RING MAGNET (DUAL ELEMENT) HALL-EFFECT SENSORS in order of B

3060

3422

3059

3056

3058

3421

K/S

E/L

K/S

E/L

+35

+75

+100

+150

+250

+280

-35

-75

-100

-150

-250

-280

130

200

335

ac coupled

direction detection

ac coupled

zero-speed

direction detection

SPECIAL-PURPOSE HALL-EFFECT SENSORS

3054

3150

3210

3421

3422

K/S

+300

+40 to +850

+5.0

–

5.0

-280

-85

7.7

335

unipolar switch, multiplexed

programmable, chopper stabilized

micropower, chopper stabilized

direction detection

E/L

+280

+85

direction detection

Operating Temperature Ranges:

S = -20°C to +85°C, E = -40°C to +85°C, J = -40°C to +115°C, K = -40°C to +125°C, L = -40°C to +150°C

Notes 1. Protected.

6. Multiplexed two-wire sensor; after proper address, power/signal bus current indicates magnetic field condition.

The products described herein are manufactured under one or more

of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283;

5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719;

5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents

pending.

Allegro MicroSystems, Inc. reserves the right to make, from time to

time, such departures from the detail specifications as may be required

to permit improvements in the performance, reliability, or

manufacturability of its products. Before placing an order, the user is

cautioned to verify that the information being relied upon is current.

Allegro products are not authorized for use as critical components

in life-support appliances, devices, or systems without express written

approval.

The information included herein is believed to be accurate and

reliable. However, Allegro MicroSystems, Inc. assumes no responsi-

bility for its use; nor for any infringements of patents or other rights of

third parties that may result from its use.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

A3507LUA [ALLEGRO]

相关型号：

A3507SUA

A3508*

A3508BAA1

A3508BAB1

A3508BAC1

A3508BAD1

A3508BGA1

A3508BGB1

A3508BGC1

A3508BGD1

A3508BSA1

A3508BSB1