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PDF AH49E Data sheet ( Hoja de datos )
| Número de pieza | AH49E | |
| Descripción | LINEAR HALL-EFFECT IC | |
| Fabricantes | BCD | |
| Logotipo |  |
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LINEAR HALL-EFFECT IC
General Description
Features
Preliminary Datasheet
AH49E
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 pro-
portion to the strength of the magnetic field.
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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 -40oC to
85oC, appropriate for commercial, consumer and
industrial applications.
The AH49E is available in standard TO-92S package.
· Miniature Construction
· Power Consumption of 3.5mA at VCC=5V for
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 -40oC 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
Jun. 2008 Rev. 1. 1
TO-92S
Figure 1. Package Type of AH49E
BCD Semiconductor Manufacturing Limited
1
1 page  
Preliminary Datasheet
LINEAR HALL-EFFECT IC
Electrical Characteristics
(VCC=5V, TA=25oC, unless otherwise specified.)
AH49E
Parameter
Supply Current
Quiescent Output Voltage
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Output Voltage Sensitivity
Output Voltage Span
Symbol
ICC
VNULL
Conditions
@ B=0GS
B=0GS to ±1000GS
VOS
Output Resistor
Magnetic Field Range
Linearity of Span
Output Noise
RO
B
BW=10Hz to 10kHz
Min
2.25
1.1
1.0 to
(VCC-1.0)
±650
Typ
3.5
2.5
1.6
0.8 to
(VCC-0.8)
60
±1000
0.7
90
Max
4.5
2.75
2.1
120
Unit
mA
V
mV/GS
V
Ω
GS
%
µV
Transfer Characteristics (VCC=5V)
When there is no ouside magnetic field (B=0GS), the
quiescent output voltage is one-half the supply voltage
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.
Contrary, a north magnetic pole will drive the output
voltage lower. The variations of voltage level up or
down are symmetrical.
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
Typical
Output
Voltage
2.5 V
-1000 -500
1.0 V
0 500
B (Gauss)
1000
Figure 4. The Transfer Characteristics of AH49E
Jun. 2008 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
5
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| PDF Descargar | [ Datasheet AH49E.PDF ] | |
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