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參數(shù)資料
| 型號： | MLX90215EVA |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Precision Programmable Linear Hall Effect Sensor |
| 中文描述： | 高精度可編程線性霍爾效應傳感器 |
| 文件頁數(shù)： | 9/9頁 |
| 文件大?。?/td> | 294K |
| 代理商： | MLX90215EVA |
*Patent Pending
MLX90215 Programmable Hall Effect Sensor Rev 4.3 7/6/01 Page 9
MLX 90215
Prec ision Programmable*
Linear Hall E ffec t S ensor
Application Notes
5
4
3
2
1
0
-100
100
Current (Amps)
V
O
MLX
90215
V
DD
A slotted ferrite
toroidal core and a
series of windings are
the main elements of a
current sensor. By
adding a
programmable Hall IC
to the air gap, not only
can the output be
calibrated accurately,
but it can also be
adjusted to respond to
virtually any range of
current
Programmable Current Sensor
Linear Precision Current Sensor
The Programmable gain, offset, and temperature com-
pensation of MLX90215 allows great flexiblity in the
design of a current sensor.
Current flowing through a conductor can produce a
proportional magnet field. The MLX90215 can then
produce an output voltage proportional to the current.
Using the programmable gain and offset function the
output of the MLX90215 can be adjusted to sense a
wide range of current allowing for a flexible design.
Slotted Torroid Example
Assuming infinite perme-
abilty of the core, the magnetic field through the air
gap produced by a single wire turn is given by equa-
tion 2
Equation 2
Where: I = current in Amperes
B = magnetic field in Tesla
l
g
= length of air gap in Meters
u
o
= Permeability of free space (4
π
10
-7
H/m)
This equation is a close estimate for the field in the air
gap, but does not take into account magnetic losses in
the core, fringing effects, and mechanical tolerances of
the air gap. The programmable MLX90215 can be
adjusted to compensate for these errors simplifying the
design. The temperature compensation of MLX90215
can also be adjusted to counteract temperature losses
of core.
For sensing a current ±100A, with an air gap of 2mm
equation 2 yields a magnetic field range of ±63mT.
The output range of the MLX90215 is 0.5V to 4.5V
(4V full scale). Equations 3a and 3b yield a sensitivity
of 32mV/mT and a V
oq
of 2.5V.
Equation 3
a)
S = 4000mV/ 126mT
b)
Voq = 4V/2 + 0.5V
The resulting gain of the current sensor is 20mV/A
with an offset of 2.5V. For best results it is recommend
that MLX90215 be programmed with a Voq of 50%
Vdd 1/2 Vdd bit set.
o
g
u
l
I
B
=
Magnetic Suppliers
Elna Ferrites Technologies Inc
Eastern Components
Fair Rite Products Corp
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| MLX90215LVA | Precision Programmable Linear Hall Effect Sensor |
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| MM1221 | 2-Input 1-Output Video Switch |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MLX90215EVA-AAA-106-BA | 制造商:Melexis Semiconductors 功能描述:IC HALL EFFECT SENSOR PREC 4SIP |
| MLX90215EVA-AAA-106-BU | 功能描述:IC SENSOR PROG LINEAR HALL 4SIP RoHS:是 類別:傳感器，轉換器 >> 磁性 - 霍爾效應，數(shù)字式開關，線性，羅盤 (IC) 系列:- 標準包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類型:旋轉 電源電壓:4.5 V ~ 5.5 V 電流 - 電源:15mA 電流 - 輸出（最大）:- 輸出類型:數(shù)字式，PWM，8.5 位串行 特點:可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應商設備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
| MLX90215LVA | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Precision Programmable Linear Hall Effect Sensor |
| MLX90215LVA-AAA-111-BA | 制造商:Melexis Semiconductors 功能描述:IC HALL EFFECT SENSOR PREC 4SIP |
| MLX90215LVA-AAA-111-BU | 功能描述:IC SENSOR PROG LINEAR HALL 4SIP RoHS:是 類別:傳感器，轉換器 >> 磁性 - 霍爾效應，數(shù)字式開關，線性，羅盤 (IC) 系列:- 標準包裝:1 系列:- 傳感范圍:20mT ~ 80mT 類型:旋轉 電源電壓:4.5 V ~ 5.5 V 電流 - 電源:15mA 電流 - 輸出（最大）:- 輸出類型:數(shù)字式，PWM，8.5 位串行 特點:可編程 工作溫度:-40°C ~ 150°C 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應商設備封裝:20-SSOP 包裝:Digi-Reel® 其它名稱:AS5132-HSST-500DKR |
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