A3515_技术文档

A3515 and A3516

Ratiometric, Linear Hall-Effect Sensors

for High-Temperature Operation

Not for New Design

These parts are in production but have been determined to be

NOT FOR NEW DESIGN. This classification indicates that sale of

this device is currently restricted to existing customer applications.

The device should not be purchased for new design applications

because obsolescence in the near future is probable. Samples are no

longer available.

Date of status change: May 2, 2005

Recommended Substitutions:

For new customers or new applications:

• for the A3515, please refer to the Allegro A1321, and

• for the A3516, please refer to the Allegro A1323.

NOTE: For detailed information on purchasing options, contact your

local Allegro field applications engineer or sales representative.

Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a

product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information

included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor

for any infringements of patents or other rights of third parties which may result from its use.

3515 AND

3516

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS

FOR HIGH-TEMPERATURE OPERATION

The A3515– and A3516– are sensitive, temperature-stable linear Hall-

effect sensors with greatly improved offset characteristics. 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

A3515– features an output sensitivity of 5 mV/G, while the A3516– has an

output sensitivity of 2.5 mV/G. See the Magnetic Characteristics table for

complete, individual device parametrics.

V

CC

Each BiCMOS monolithic circuit integrates a Hall element, improved

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.

1

2

3

A proprietary dynamic offset cancelation technique, with an internal

high-frequency clock, reduces the residual offset voltage, which is normally

caused by device overmolding, temperature dependancies, and thermal stress.

This technique produces devices that have an extremely stable quiescent

output voltage, are immune to mechanical stress, and have precise recover-

ability after temperature cycling. 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.

Dwg. PH-006

Pinning is shown viewed from branded side.

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

FEATURES

ABSOLUTE MAXIMUM RATINGS

■ Temperature-Stable Quiescent Output Voltage

■ Precise Recoverability After Temperature Cycling

■ Output Voltage Proportional to Applied Magnetic Field

■ Ratiometric Rail-to-Rail Output

■ Improved Sensitivity

Supply Voltage, V_CC.............................. 8.0 V

Output Voltage, V_O................................ 8.0 V

Output Sink Current, I_O....................... 10 mA

Magnetic Flux Density, B.............. Unlimited

Package Power Dissipation,

■ 4.5 V to 5.5 V Operation

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

Operating Temperature Range*, T_A

■ Immune to Mechanical Stress

■ Small Package Size

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

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

Storage Temperature Range,

■ Solid-State Reliability

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

* Infrequent excursions permitted; see

Applications Information.

Always order by complete part number, e.g., A3515LUA .

3515 AND 3516

RATIOMETRIC,

LINEAR

HALL-EFFECT SENSORS

FUNCTIONAL BLOCK DIAGRAM

1

SUPPLY

Vcc

3

2

OUTPUT

GROUND

+

X

–

+

–

Dwg. FH-016A

Vcc/2

θ°

800

700

Suffix "–UA"

θJA = 165°C/W

R

600

500

400

300

200

100

0

Suffix "–U"

θJA = 184°C/W

R

Suffix "E–"

Suffix "L–"

20

40

60

80

100

120

140

160

180

°

AMBIENT TEMPERATURE in

C

Dwg. GH-046A

115 Northeast Cutoff, Box 15036

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

2

3515 AND 3516

RATIOMETRIC,

LINEAR

HALL-EFFECT SENSORS

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

7.2

5.5

10

V

mA

V

I_CC

B = 0, V_CC= 6 V, I_O= 0

B = 0, I_O= 1 mA, T_A= 25°C

Quiescent

V_OQ

2.425 2.500 2.575

Voltage Output

Output Voltage

V_OH

V_OL

I_OLM

B = +X*, I_O

=

1

mA

–

4.7–

V

B = -X*, I_O= -1 mA

B = -X*, V_O= 0

–

0.2

–

V

Output

-1.0

-1.5

mA

Source Current Limit

Bandwidth (-3 dB)

Clock Frequency

Output Resistance

BW

f_C

–

30

–

kHz

Ω

170

1.0

400

r_O

I_O≤ -2 mA

Wide-Band

e_o

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

µV

Output Noise (rms)

I_O≤ -1 mA, C_O= 100 pF

NOTE 1 – Typical data is at T_A= 25°C and is for design information only.

NOTE 2 – 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.

www.allegromicro.com

3

3515 AND 3516

RATIOMETRIC,

LINEAR

HALL-EFFECT SENSORS

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

(unless otherwise noted).

Part Numbers

A3515EUA

Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Units

-40 +85 -40 +150 -40 +85 -40 +150 °C

2.25 2.50 2.75 mV/G

A3515LUA

A3516EUA

A3516LUA

Characteristic*

Operating Temp. Range, T_A

Sensitivity at T_A= 25°C

∆Sens_(∆T)at T_A= Max.

∆Sens_(∆T)at T_A= Min.

–

4.50 5.00 5.50

-2.5 2.5 7.5

-9.0 -1.3 1.0

4.50 5.00 5.50

-2.5 2.5 7.5

-9.0 -1.3 1.0

2.25 2.50 2.75

-2.5 2.5 7.5

-9.0 -1.3 1.0

-2.5 2.5 7.5

-9.0 -1.3 1.0

%

G

†

∆V_OQ(∆T)

–

±10

–

±10

–

±10

–

±10

–

Ratiometry, ∆V_OQ(∆V)

Ratiometry, ∆Sens_(∆V)

Positive Linearity, Lin+

Negative Linearity, Lin–

Symmetry

100

%

–

NOTE 1 – Magnetic flux density is measured at most sensitive area of device located 0.0195" (0.50 mm) below the branded face of

the “UA” package.

NOTE 2 – 10 G = 1 mT, exactly.

NOTE 3 – Except for ∆Sens_(∆T), typical data is at T_A= 25°C and is for design information only.

* See Characteristics Definitions for test conditions.

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

115 Northeast Cutoff, Box 15036

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

4

3515 AND 3516

RATIOMETRIC,

LINEAR

HALL-EFFECT SENSORS

CHARACTERISTICS DEFINITIONS

Ratiometry. The A3515xUA and A3516xUA feature a

ratiometric output. The quiescent voltage output and sensitivity

are proportional to the supply voltage (ratiometric).

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

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

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

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

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)

1000 G

2 (V_O(250G)– V_OQ

)

Sens =

(2)

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)

www.allegromicro.com

5

3515 AND 3516

RATIOMETRIC,

LINEAR

HALL-EFFECT SENSORS

TYPICAL CHARACTERISTICS

1.4

1.2

9.0

8.0

7.0

6.0

Vcc = 5.5 V

Vcc = 5 V

_O= -1 mA

I

1.0

0.8

_O= 1 mA

I

_O= 5 mA

I

_O= 10 mA

I

0.6

0.4

125

150

100

125

-50

-25

0

25

50

75

-50

-25

0

25

50

75

°

AMBIENT TEMPERATURE IN °C

AMBIENT TEMPERATURE IN

C

Dwg. GH-039-2

Dwg. GH-060-1

2.55

2.54

2.53

2.52

6.0

5.0

A3515–

4.0

2.51

2.50

2.49

2.48

A3515–

3.0

2.0

1.0

0

A3516–

Vcc = 5 V

Io = -1 mA

Vcc = 5 V

Io = -1 mA

2.47

2.46

2.45

150

100

125

100

125

-50

-25

0

25

50

75

-50

-25

0

25

50

75

°

AMBIENT TEMPERATURE IN

C

°

AMBIENT TEMPERATURE IN

C

Dwg. GH-067

Dwg. GH-066

115 Northeast Cutoff, Box 15036

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

6

3515 AND 3516

RATIOMETRIC,

LINEAR

HALL-EFFECT SENSORS

APPLICATIONS INFORMATION

SENSOR LOCATION

Calibrated linear Hall devices, which can be used to deter-

mine the actual flux density presented to the sensor in a particu-

lar application, are available.

SUFFIX “UA”

ACTIVE AREA DEPTH

For safe, reliable operation, the output should not be pulled

above the supply voltage or pulled below the device ground.

0.0195"

0.50 mm

NOM

0.081"

2.06 mm

For optimum performance, a 0.1 µF capacitor between the

supply and ground, and a 100 pF capacitor between the output

and ground, should be added.

0.056"

1.42 mm

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 A3515xUA and A3516xUA 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.

A

BRANDED

SURFACE

1

2

3

Dwg. MH-011-7A

These devices can withstand infrequent temperature excur-

sions, beyond the Absolute Maximum Ratings, to

T_A= 170°C provided the junction temperature, T_J, does not

exceed 200°C.

Extensive applications information on Hall-effect sensors

and magnets is also available in the “Hall-Effect IC Applications

Guide”, which can be found in the latest issue of the Allegro

MicroSystems Electronic Data Book, AMS-702 or Application

Note 27701, or at

Allegro

www.allegromicro.com

TYPICAL CURRENT-SENSING APPLICATION

B ≈ N x 6.9 G/A

Dwg. AH-005A

www.allegromicro.com

7

3515 AND 3516

RATIOMETRIC,

LINEAR

HALL-EFFECT SENSORS

TYPICAL POSITION-SENSING APPLICATIONS

(Alnico 8, dimensions in inches)

VCC

+

0.21

D

N

S

N

SENSOR DEPTH

BELOW PACKAGE FACE

N

S

N

S

N

D

0

V

OQ

0.19

S

N

S

D

0

VOQ

0.5

GND

0.10

-

0

0.1

0.2

0.3

0.4

-0.06

-0.04

0

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

N

S

N

S

D

0.21

D

0

V

OQ

EFFECTIVE AIR GAP = 0.095

0

VOQ

0.25

GND

-

-0.4

-0.2

0

0.2

0.4

0

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

8

3515 AND 3516

RATIOMETRIC,

LINEAR

HALL-EFFECT SENSORS

A3515xUA and A3516xUA

Dimensions in Millimeters

Dimensions in Inches

(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

1

2

3

1

2

3

16.26

15.24

0.44

0.35

0.640

0.600

0.0173

0.0138

0.48

0.36

0.0189

0.0142

SEE NOTE

1.27

BSC

0.050

BSC

Dwg. MH-014E mm

Dwg. MH-014E in

Radial Lead Form (order A351xxUA-LC)

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.

6. Supplied in bulk pack (500 pieces per bag).

1

2

3

0.108"

(2.74 mm)

0.620"

0.500"

(15.7 mm

12.7 mm)

0.100"

(2.5 mm)

Dwg. MH-026

NOTE: Lead-form dimensions are the nominals produced on the

forming equipment. No dimensional tolerance is implied or

guaranteed for bulk packaging (500 pieces per bag).

www.allegromicro.com

9

3515 AND 3516

RATIOMETRIC,

LINEAR

HALL-EFFECT SENSORS

Surface-Mount Lead Form (order A351xxUA-TL)

Dimensions in Inches

Dimensions in Millimeters

(controlling dimensions)

(for reference only)

0.095

±0.005

2.41

±0.13

0.002

MAX

0.051

MAX

0°–8°

0.51

MIN

0.004

MAX

0.10

MAX

0.020

MIN

FLAT

Dwg. MH-015 in

FLAT

Dwg. MH-015 mm

1.27

BSC

0.050

BSC

1.57

0.062

0.97

0.038

Dwg. MA-013-3 mm

Dwg. MA-013-3 in

NOTE: Supplied in bulk pack (500 devices per bag).

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 responsibil-

ity 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

10


型号：	A3515
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
文件：	总11页 (文件大小：319K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

A3515 [ALLEGRO]

相关型号：

A3515*

A3515ETL

A3515EU

A3515EUA

A3515EUA-LC

A3515EUA-TL

A3515EUATL

A3515LTL

A3515LU

A3515LUA

A3515LUA-TL

A3515LUA.