AH49EZ3-E1 Просмотр технического описания (PDF) - BCD Semiconductor

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AH49EZ3-E1

LINEAR HALL-EFFECT IC

BCD Semiconductor 

Preliminary Datasheet

LINEAR HALL-EFFECT IC

Electrical Characteristics

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

AH49E

Parameter

Symbol

Conditions

Min

Supply Current

ICC

Quiescent Output Voltage VNULL @ B=0GS

2.25

Output Voltage Sensitivity

B=0GS to ±1000GS

1.1

Typ

Max

3.5

4.5

2.5

2.75

1.6

2.1

Output Voltage Span

VOS

1.0 to

(VCC-1.0)

0.8 to

(VCC-0.8)

Output Resistor

Magnetic Field Range

Linearity of Span

Output Noise

RO

60

120

B

±650

±1000

0.7

BW=10Hz to 10kHz

90

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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