Diodes AH49E User Manual

Data Sheet

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 and SOT­23-3 packages.

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 Types of AH49E

SOT-23-3

Aug. 2010 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

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Data Sheet

LINEAR HALL-EFFECT IC AH49E

Pin Configuration

Z3 Package

(TO-92S )

3

2

1

(Front View)

Figure 2. Pin Configuration of AH49E

Pin Description

Pin Number

TO-92S SOT-23-3

1 1 VCC Supply voltage

2 3 GND Ground pin

3 2 OUT Output

Pin Name Function

OUT

GND

VCC

N Package

(SOT-23-3 )

GND

3

VCC

(Top View)

21

OUT

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Data Sheet

LINEAR HALL-EFFECT IC AH49E

Functional Block Diagram

1 (1)

VCC

Sensor

A (B)
A for TO-92S
B for SOT-23-3

Ordering Information

Circuit Type

Packages

Z3: TO-92S

N: SOT-23-3

HALL

Figure 3. Functional Block Diagram of AH49E

Amplifier

AH49E -

3 (2)

65µA

Typ.

2 (3)

E1: Lead Free

G1: Green

Blank: Bulk

TR: Tape and Reel

OUT

GND

Package

TO-92S

SOT-23-3 AH49ENTR-G1 GJ1 Tape & Reel

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

Temperature

Range

-40 to 85

o

C

Lead Free Green Lead Free Green

AH49EZ3-E1 AH49EZ3-G1 AH49E AH49G Bulk

Part Number Marking ID

Packing Type

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Data Sheet

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

V

o

C

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Data Sheet

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

CC

NULL

OS

O

@ B=0GS 2.25 2.5 2.75 V

1.0 to

-1.0)

(V

CC

3.5 4.5 mA

0.8 to

(VCC-0.8)

60 120

V

Ω

µV

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Data Sheet

LINEAR HALL-EFFECT IC AH49E

Transfer Characteristics (VCC=5V)

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

For TO-92S package, if a south magnetic pole
approches to the front face (the side with marking ID)
of the Hall effect sensor, the circuit will drive the
output voltage higher. Contrary, a north magnetic pole
will drive the output voltage lower. The variations of
voltage level up or down are symmetrical. Due to
SOT-23-3 is reversed packaging with TO-92S, so the
magnetic performance is also reversed. Therefor, if
the reversed magnetic pole approches to the front face
(the side with marking ID), the output is the same as
TO-92S package.
.
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
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

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

V

4.0 V

2.5 V

1.0 V

1000-1000 500-500 0

Figure 4. The Transfer Characteristics of AH49E

Typical
Output

Voltage

B (Gauss)

South Pole

TO-92S Package SOT-23-3 Package

North Pole

Aug. 2010 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

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Data Sheet

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

-40 0 40 80 120

TA(OC)

Figure 7. Output Voltage vs. Ambient Temperature

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Data Sheet

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

Aug. 2010 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

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Data Sheet

LINEAR HALL-EFFECT IC AH49E

Mechanical Dimensions (Continued)

SOT-23-3 Unit: mm(inch)

2.820(0.111)

3.020(0.119)

Package Sensor Location

(For Hall IC)

1.300(0.051)

1.600(0.063)

0.300(0.012)

0.600(0.024)

0.100(0.004)

0.200(0.008)

2.650(0.104)

2.950(0.116)

0.950(0.037)
TYP

MAX.

1.450(0.057)

1.800(0.071)

2.000(0.079)

1.500(0.059)

0.685(0.027)

0.985(0.039)

0.300(0.012)

0.500(0.020)

0.900(0.035)

1.300(0.051)

1.700(0.067)

0.000(0.000)

0.150(0.006)

0.200(0.008)

0

°

8

°

Aug. 2010 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

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BCD Semiconductor Manufacturing Limited

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