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PDF AH49H Data sheet ( Hoja de datos )
| Número de pieza | AH49H | |
| Descripción | LINEAR HALL EFFECT IC | |
| Fabricantes | BCD | |
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Data Sheet
LINEAR HALL EFFECT IC
AH49H
General Description
The AH49H 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
components. It also includes precision resistors to
provide increased temperature stability and accuracy.
The operating temperature range of these linear Hall
sensors is -40°C to 105°C, appropriate for
commercial, consumer, and industrial environments.
The AH49H is available in standard TO-92S-3 and
SOT-23-3 packages.
Features
• Miniature Construction
• Power Consumption of 2mA at VCC=3.3V 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: -40°C to 105°C
• Responds to Either Positive or Negative Gauss
• The Maximum Instantaneous Supply Voltage
• Up to 50V
• High ESD Rating: 6000V (Human Body Model)
400V (Machine Model)
Application
• Current Sensing
• Motor Control
• Position Sensing
• Magnetic Code Reading
• Rotary Encoder
• Ferrous Metal Detector
• Vibration Sensing
• Liquid Level Sensing
• Weight Sensing
Jun. 2013 Rev. 1.2
TO-92S-3
SOT-23-3
Figure 1. Package Types of AH49H
BCD Semiconductor Manufacturing Limited
1 page  
Data Sheet
LINEAR HALL EFFECT IC
AH49H
Electrical Characteristics
VCC=3.3V, TA=25°C, unless otherwise specified.
Parameter
Supply Current
Quiescent
Output
Voltage
Output
Voltage
Sensitivity
Output Voltage Span
Output Resistor
Linear Magnetic Range
Output Noise
Symbol
ICC
VNULL
VSEN
VOUT S
ROUT
B
Conditions
B=0 (Gauss)
B=±600 (Gauss)
Bandwidth=10Hz
to 10kHz
Min
1.2
1.45
30
Typ Max Unit
2 3.2 mA
1.7 1.85 V
0.33
0.85 to 2.6
50
±3000
90
mV/Gauss
V
70 Ω
Gauss
μV
Transferring Characteristics (VCC=3.3V)
When there is no outside magnetic field (B=0Gauss),
the quiescent output voltage is one-half the supply
voltage in general.
For TO-92S-3 package, if a south magnetic pole
approaches the front face (the side with marking ID)
of the Hall effect sensor, the circuit will drive the
output voltage higher. In contrary, a north magnetic
pole will drive the output voltage lower. The
variations of voltage level up or down are
symmetrical. Because the SOT-23-3 is reversed
packaging with TO-92S-3, so the magnetic
performance is also reversed. Therefore, if the
reversed magnetic pole approaches the front face, the
output is the same as TO-92S-3 package. Greatest
magnetic sensitivity is obtained with a supply voltage
of 8V, but at the cost of increased supply current and
a slight loss of output symmetry. So, it is not
South Pole
recommended to work in such condition unless the
output voltage magnitude is a main issue. The output
signal can be capacitively coupled to a next-level
amplifier for further amplifying if the changing
frequency of the magnetic field is high.
Figure 4. Transferring Characteristic of AH49H
North Pole
For TO-92S-3
For SOT-23-3
Figure 5. Magnetic Characteristic of AH49H
Jun. 2013 Rev. 1.2
BCD Semiconductor Manufacturing Limited
5 Page | ||
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