A1322L [ALLEGRO]

Hall Effect Sensor, 0.2-4.7V, Rectangular, Surface Mount, LH-3;


型号：	A1322L
厂家：	ALLEGRO MICROSYSTEMS
描述：	Hall Effect Sensor, 0.2-4.7V, Rectangular, Surface Mount, LH-3 输出元件传感器换能器
文件：	总11页 (文件大小：763K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Preliminary

A1321 / A1322 / A1323

RATIOMETRIC, LINEAR HALL EFFECT SENSOR FOR HIGH

TEMPERATURE OPERATION

The A132X linear Hall-effect sensors are optimized, sensitive, temperature-

stable linear Hall-effect sensors with greatly improved offset characteristics.

These ratiometric Hall-effect sensors provide a voltage output that is proportional

to the applied magnetic field. The linear family has a quiescent output voltage

that is 50% of the supply voltage and output sensitivity options of nominally

2.5mV/G, 3.125mV/G, and 5mV/G. The features of this linear family are ideal for

use in linear and rotary position sensing systems in harsh environments of

automotive and industrial applications over extended temperatures to –40 °C and

+150 °C.

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.

UA-Package

A proprietary dynamic offset cancellation technique, with an internal high-

frequency clock reduces the residual offset voltage, which is normally caused by

device over molding, temperature dependencies, and thermal stress. The high

frequency clock allows for a greater sampling which produces higher accuracy

and faster signal processing capability, This technique produces devices that

have an extremely stable quiescent output voltage, are immune to mechanical

stress, and have precise recoverability after temperature cycling. Having the

Hall element and an amplifier on a single chip minimizes many problems

normally associated with low-level analog signals.

LH-Package

See Block Diagram for Pinning.

Output precision is obtained by internal gain and offset trim adjustments

made at end-of-line during the manufacturing process.

ABSOLUTE MAXIMUM RATINGS

The A132X family is provided in a 3-pin single inline package (Allegro UA

package) and a 3-pin surface mount package (Allegro LH package).

Supply Voltage ..................……..…..… 7V

Output Voltage…………………………. 7V

Reverse Supply Voltage……………… -0.1V

Reverse Output Voltage……………… -0.1V

Output Sink Current……………….…..10mA

Operating Temperature, T_a

Suffix ‘E-‘…………..... -40°C to 85°C

Suffix ‘L-‘…………... -40°C to 150°C

Storage Temperature ......................... 170°C

Maximum Junction Temperature. ……165°C

FEATURES/BENEFITS

Temperature-Stable Quiescent Output Voltage

Precise Recoverability After Temperature Cycling

Output Voltage Proportional to Magnetic Flux Density

Ratiometric Rail-to-Rail Output

Improved Sensitivity

4.5 V to 5.5 V Operation

Immune to Mechanical Stress

Solid-State Reliability

n Robust EMC protection

Some restrictions may apply to certain types of sales of the A1322 and L temperature range

for all devices. Contact factory for details.

Always order by complete part number, e.g., A1322LUA

115 Northeast Cutoff, Box 15036

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

Rev. 1.6 28Aug03 CMG

A1321/A1322/A1323

RATIOMETRIC, LINEAR

HALL EFFECT SENSOR

Block Diagram – UA Package

Supply

(Pin 1)

Amp

Out

Gnd

(Pin 2)

Offset

Gain

Trim control

Output

(Pin 3)

Block Diagram – LH Package

Supply

(Pin 1)

Amp

Out

Output

(Pin 2)

Offset

Gain

Trim control

Gnd

(Pin 3)

115 Northeast Cutoff, Box 15036

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

Rev. 1.6 28Aug03 CMG

A1321/A1322/A1323

RATIOMETRIC, LINEAR

HALL EFFECT SENSOR

DEVICE CHARACTERISTICS over operating temperature range and Vcc = 5 V unless otherwise

noted.

Characteristic

Symbol

Test Conditions

Limits

Min.

Typ.

Max.

Units

ELECTRICAL CHARACTERISTICS

Supply Voltage

Supply Current

Quiescent Voltage

Operating, Tj < 165°C

B = 0, I_O= 0

B=0, Ta=25°C, I_O= 1 mA

B = +X*, I_O= -1mA

B = -X*, I_O= 1mA

4.5

5.0

5.6

2.5

4.7

0.2

5.5

2.575

V_cc__op

I_cc

V_oq

2.425

V_OH

V_OL

Output Voltage

Output Source Current Lim it

I_OLM

B = -X*, V ® 0

-1.0

-1.5

Supply Zener Clamp Voltage

Output Bandwidth

Clock Frequency

V_Z

F_C

Icc = 15mA, Ta = 25°C, T= 2 min

7.6

150

kHz

OUTPUT CHARACTERISTICS over operating temperature range and Vcc range unless otherwsie noted.

C_bypass= 0.1uF, no load

A1323

A1322

A1321

Rout

1.5

mV_pp

Noise, V_N

Output Resistance

I_O£ +/-1 mA

I_O£ +/-1 mA, Output-Ground

Output Load Resistance

Output Capacitance Load

R_L

C_L

4.7

Out - Gnd

Note 1 – Typical data is at Ta – 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), respectively. It is NOT

intended to indicate a range of linear operation.

Noise specification includes digital and analog noise.

115 Northeast Cutoff, Box 15036

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

Rev. 1.6 28Aug03 CMG

A1321/A1322/A1323

RATIOMETRIC, LINEAR

HALL EFFECT SENSOR

MAGNETIC CHARACTERISTICS over temperature range, at V_cc= 5 V, I_O= -1 mA (unless otherwise noted).

Part Numbers

A1321E/L

A1322E/L

Typ

A1323E/L

Typ

Characteristic*

Sensitivity at TA

Delta Sens at TA = max

Delta Sens at TA = min

Delta V_OQ(DT)(B)

Ratiometry, DV_OQ(DV)

Ratiometry, DSens

Positive Linearity, Lin+

Negative Linearity, Lin-

Min

4.75

-2.5

-6

Typ

Max

5.25

7.5

Min

2.969

-2.5

-6

Max

3.281

7.5

Min

2.375

-2.5

-6

Max

2.625

7.5

Units

mV/G

3.125

2.5

+/-10

+/- 1

+/-10

+/- 1

+/-10

+/- 1

(D V)

Symmetry

+/- 1

Note 1 – 10 G = 1 mT

Note 2 – Except for Delta Sens, typical data is at T_a= 25°C and is for design information only.

*See Characteristics Definitions for test conditions.

115 Northeast Cutoff, Box 15036

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

Rev. 1.6 28Aug03 CMG

A1321/A1322/A1323

RATIOMETRIC, LINEAR

HALL EFFECT SENSOR

CHARACTERISTIC DEFINITIONS

Quiescent Voltage Output. In the quiescent state (no

magnetic field), the output equals one half of the supply

voltage over the operating voltage and temperature

range. 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 in magnetic flux density units (B) as

V_OQ(Vcc)/V_{OQ(5V )}

V_CC/5V

DV_OQ(DV)

´ 100%

(4)

and the percent ratiometric change in sensitivity is

defined as

Sens_(Vcc)/ Sens_(5V)

DSens_{(DV )}

´ 100% (5)

V_CC/ 5V

(V_{OQ(T )}- V_{OQ(25°C )}

)

Linearity and Symmetry. The on-chip output stage is

designed to provide a linear output with a supply voltage

of 5 V. Although application of very high magnetic fields

will not damage these devices, it will force the output

into a non-linear region. Linearity in percent is

measured and defined as

DV_OQ(DT)(B) =

(1)

Sens_(25°C)

This calculation yields the device’s equivalent accuracy,

over the operating temperature range, in gauss.

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

V_{O( B)}- V_OQ

Lin+ =

Lin- =

´ 100%

(6)

(7)

2(V_{O(B / 2)}- V_OQ)

V_{O(- B)}- V_OQ

´ 100%

2(V_{O(- B/ 2)}- V_OQ)

and output symmetry as

V_{O(- B)}- V_O(+B)

V_O(B)- V_OQ

Sym =

Sens =

(2)

´ 100%

(8)

(V_OQ- V_{O(- B)}

)

The stability of sensitivity as a function of temperature is

defined as

Sens_(TA)- Sens_{(25°C )}

DSens_{(DT )}

´ 100%

(3)

Sens_{(25°C )}

Ratiometric. The A132X family features a ratiometric

output. The quiescent voltage output and sensitivity are

proportional to the supply voltage (ratiometric).

The percent ratiometric change in the quiescent voltage

output is defined as

115 Northeast Cutoff, Box 15036

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

Rev. 1.6 28Aug03 CMG

A1321/A1322/A1323

RATIOMETRIC, LINEAR

HALL EFFECT SENSOR

TYPICAL CHARATERISTICS

(Intentionally Left Blank)

115 Northeast Cutoff, Box 15036

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

Rev. 1.6 28Aug03 CMG

A1321/A1322/A1323

RATIOMETRIC, LINEAR

HALL EFFECT SENSOR

115 Northeast Cutoff, Box 15036

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

Rev. 1.6 28Aug03 CMG

A1321/A1322/A1323

RATIOMETRIC, LINEAR

HALL EFFECT SENSOR

115 Northeast Cutoff, Box 15036

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

Rev. 1.6 28Aug03 CMG

A1321/A1322/A1323

RATIOMETRIC, LINEAR

HALL EFFECT SENSOR

115 Northeast Cutoff, Box 15036

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

Rev. 1.6 28Aug03 CMG

A1321/A1322/A1323

RATIOMETRIC, LINEAR

HALL EFFECT SENSOR

The products described herein are manufactured under one or more

of the following U.S.patents:4,761,569;5,619,137;5,621,319.In

addition,a patent is pending for Allegro's magnetic pole-independent

feature.Allegro has several foreign counterpart patents as well.

Allegro has not licensed any of these patents to any third party.

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

Rev. 1.6 28Aug03 CMG

A1322L [ALLEGRO]

相关型号：

A1322LLH

A1322LLHLT

A1322LLHLT-T

A1322LLHLT-T2

A1322LUA

A1322LUA-T

A1322LUA-T3

A1322LUA-TL

A1323

A1323E

A1323ELH

A1323ELHLT-T