Datasheet AH49E Datasheet (BCD Semiconductor0

Preliminary Datasheet

LINEAR HALL-EFFECT IC AH49E

General Description

The AH49E is a small, versatile linear Hall-effect
device that is operated by the magnetic field from a
permanent magnet or an electromagnet. The output
voltage is set by the supply voltage and varies in pro­portion to the strength of the magnetic field.

The integrated circuitry features low noise output,
which makes it unnecessary to use external filtering. It
also includes precision resistors to provide increased
temperature stability and accuracy. The operating tem-

perature range of these linear Hall sensors is -40

o

85

C, appropriate for commercial, consumer and

industrial applications.

The AH49E is available in standard TO-92S package.

o

C to

Features

· Miniature Construction

· Power Consumption of 3.5mA at V

=5V for

CC

Energy Efficiency

· Single Current Sourcing Output

· Linear Output for Circuit Design Flexibility

· Low Noise Output Virtually Eliminates the Need

for Filtering

· A Stable and Accurate Output

· Temperature Range of -40

o

C to 85oC

· Responds to Either Positive or Negative Gauss

Applications

· Current Sensing

· Motor Control

· Position Sensing

· Magnetic Code Reading

· Ferrous Metal Detector

· Vibration Sensing

· Liquid Level Sensing

· Weight Sensing

TO-92S

Figure 1. Package Type of AH49E

Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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Preliminary Datasheet

LINEAR HALL-EFFECT IC AH49E

Pin Configuration

Z3 Package

(TO-92S )

3

OUT

2

GND

1

VCC

Figure 2. Pin Configuration of AH49E (Bottom View)

Pin Description

Pin Number Pin Name Function

1 VCC Supply voltage
2 GND Ground pin
3 OUT Output

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Preliminary Datasheet

LINEAR HALL-EFFECT IC AH49E

Functional Block Diagram

1

VCC

Sensor

Ordering Information

Circuit Type

Package

Z3: TO-92S

HALL

Figure 3. Functional Block Diagram of AH49E

Amplifier

AH49E -

3

OUT

65µA

Typ.

2

GND

E1: Lead Free

G1: Green

Blank: Bulk

Package

TO-92S

BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part numb er, are RoHS compliant. Products with
"G1" suffix are available in green package.

Temperature

Range

o

-40 to 85

C

Lead Free Green Lead Free Green

AH49EZ3-E1 AH49EZ3-G1 AH49E AH49G Bulk

Part Number Marking ID

Packing

Type

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Preliminary Datasheet

LINEAR HALL-EFFECT IC AH49E

Absolute Maximum Ratings (Note 1)

Parameter Symbol Value Unit

Supply Voltage V

Output Current I

Operating Temperature T

Storage Temperature Range T

CC

O

A

STG

8V

10 mA

-40 to 100

-50 to 150

o

C

o

C

ESD (Human Body Model) 3000 V

Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indi­cated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended
periods may affect device reliability.

Recommended Operating Conditions

Parameter Symbol Min Max Unit

Supply Voltage V
Operating Temperature T

CC

-40 85

OP

3.0 6.5

Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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V

o

C

Preliminary Datasheet

LINEAR HALL-EFFECT IC AH49E

Electrical Characteristics

(VCC=5V, TA=25oC, unless otherwise specified.)

Parameter Symbol Conditions Min Typ Max Unit

Supply Current I
Quiescent Output Voltage V

Output Voltage Sensitivity B=0GS to ±1000GS 1.1 1.6 2.1 mV/GS

Output Voltage Span V

Output Resistor R
Magnetic Field Range B ±650 ±1000 GS
Linearity of Span 0.7 %
Output Noise BW=10Hz to 10kHz 90

Transfer Characteristics (V

CC

NULL

OS

O

@ B=0GS 2.25 2.5 2.75 V

1.0 to

-1.0)

(V

CC

=5V)

CC

3.5 4.5 mA

0.8 to

(VCC-0.8)

60 120

When there is no ouside magnetic field (B=0GS), the
quiescent output voltage is one-half the supply voltage

V

in general. If a south magnetic pole approches to the
front face (the side with marking ID) of the Halleffect
sensor, the circuit will drive the output voltage higher.

4.0 V

Contrary, a north magnetic pole will drive the output
voltage lower. The variations of voltage level up or
down are symmetrical.

2.5 V

V

Ω

µV

Typical
Output

Voltage

Greatest magnetic sensitivity is obtained with a supply
voltage of 6V, but at the cost of increased supply
current and a slight loss of output symmetry. So, it is

1.0 V
B (Gauss)

1000-1000 500-500 0

not recommended to work in such condition unless the
output voltage magnitude is a main issue. The output
signal can be capacitively coupled to an amplifier for

Figure 4. The Transfer Characteristics of AH49E

boosting further if the changing frequency of the
magnetic field is high.

Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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Preliminary Datasheet

LINEAR HALL-EFFECT IC AH49E

Typical Performance Characteristics

5

VCC=5V
No load

4

3

(V)

OUT

V

2

1

0

-1000 -500 0 500 1000

B(GS)

Figure 5. Output Voltage vs. Magnetic Field

5

VCC=5V
B=0GS

4

No load

5

B=0GS
No load

4

3

(V)

OUT

V

2

1

0

2345678

VCC(V)

Figure 6. Output Voltage vs. Supply Voltage

3

(V)

OUT

V

2

1

0

-50 0 50 100

TA(OC)

Figure 7. Output Voltage vs. Ambient Temperature

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Preliminary Datasheet

LINEAR HALL-EFFECT IC AH49E

Mechanical Dimensions

TO-92S Unit: mm(inch)

Package Sensor

Location

0.440(0.017)
TYP

°

44
46

°

0.710(0.028)

0.810(0.032)

4.000(0.157)

4.200(0.165)

2.200(0.087)

1.900(0.075)

1.480(0.058)

1.680(0.066)

1.350(0.053)

1.050(0.041)

3.080(0.121)

3.280(0.129)

2.200(0.087)

2.400(0.094)

13.500(0.531)

14.500(0.571)

1.270(0.050)
TYP

0.380(0.015)
TYP

Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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BCD Semiconductor Manufacturing Limited

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