MLX91205
IMC Current Sensor (Triaxis™ Technology)
Features and Benefits
Triaxis™ Hall Technology
Sensitive to a magnetic field parallel to the
chip surface
Very high sensitivity
Linear output voltage proportional to a
magnetic field
Wideband: DC to 100kHz
Short response time 8µs
Low offset and offset drift
Very low noise
Isolated from current conductor
Surface mount SOIC8 package
Applications Examples
AC and/or DC contactless current
measurement
Wideband Magnetic Field Measurement
Battery Management
AC/DC Converters
Motor Control
Solar Power Converter (MPPT)
Power Management
Ordering Information
Part No.
MLX91205KDC-LB
MLX91205KDC-HB
Temperature Code
(-40° to 125°
C
C)
(-40° to 125°
C
C)
Package Code
DC (SOIC)
DC (SOIC)
Option code
1 Functional diagram
NC
VDD
GND
2 General description
The new Triaxis™ current sensor MLX91205 is a
single axis integrated magnetic sensor based on
the Hall Effect. It produces an analog linear, ratio-
metric output voltage proportional to the applied
magnetic field parallel with the chip surface.
The circuit is fabricated using a standard CMOS
process. The additional ferromagnetic layer
(Triaxis™ or IMC™ = Integrated Magnetic
Concentrator) that is added in a simple post-
processing step, amplifies the magnetic field and
concentrates it on the Hall elements. Therefore,
the circuit features very high magnetic sensitivity,
low offset, and low noise.
The MLX91205 is ideally suited for current
sensing
in
automotive
and
industrial
environments.
There are 2 different product versions available.
The 91205HB features a linear magnetic field
range of ±20mT and the 91205LB features a linear
range of ±7.5mT.
HB refers to a high magnetic field, whereas LB
refers to a low magnetic field range.
Tria is
™
Modulator
Amplifier
Demodulator
CO_OUT
Offset
Cancellation
Buffer
A_OUT
Biasing
Unit
Calibration Unit
PV
PC
PD
3901091205
Rev 010
Page 1 of 13
Data Sheet
Jun/09
MLX91205
IMC Current Sensor (Triaxis™ Technology)
Table of Contents
1 Functional diagram ......................................................................................................... 1
2 General description ........................................................................................................ 1
3 Glossary of Terms .......................................................................................................... 3
4 Maximum ratings ............................................................................................................ 3
5 Pin definitions and descriptions.................................................................................... 3
6 MLX91205 General Electrical Specifications ................................................................ 4
MLX91205 Sensor Specific Specifications ..................................................................... 4
7........................................................................................................................................... 4
7.1 91205 LB: Low Field version 10mT (marking xxL) .......................................................................................................................... 4
7.2 91205HB: High Field version 25mT (marking xxH) ......................................................................................................................... 5
8 Detailed General Description ......................................................................................... 6
9 Unique Features.............................................................................................................. 6
10 Performance Graphs .................................................................................................... 7
10.1 Offset over Temperature .............................................................................................................................................................. 7
10.2 Sensitivity over Temperature ........................................................................................................................................................ 7
11 Applications Information.............................................................................................. 8
11.1 Low current measurement up to ±2 A ........................................................................................................................................... 8
11.2 Medium current up to ±30 A ......................................................................................................................................................... 8
11.3 High current measurement up to ±600 A ...................................................................................................................................... 8
11.4 Customer Calibration with MCU.................................................................................................................................................... 8
12 Application Diagram ..................................................................................................... 9
12.1 Direct Single Ended Output .......................................................................................................................................................... 9
12.2 Direct Differential Output .............................................................................................................................................................. 9
13 Standard information regarding manufacturability of Melexis products with
different soldering processes......................................................................................... 10
14 ESD Precautions ......................................................................................................... 11
15 Package Information................................................................................................... 11
15.1 Package Dimensions.................................................................................................................................................................. 11
15.2 Pinout and marking .................................................................................................................................................................... 12
15.3 Hall plate positioning .................................................................................................................................................................. 12
16 Disclaimer.................................................................................................................... 13
3901091205
Rev 010
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Data Sheet
Jun/09
MLX91205
IMC Current Sensor (Triaxis™ Technology)
3 Glossary of Terms
Gauss (G), Tesla (T): Magnetic flux density units where 1 mT = 10 G.
ADC: Analog-to-Digital Converter
TC: Sensitivity Temperature Coefficient (in ppm/Deg.C.).
Tria is : The Tria is™ technology refers to the Melexis Hall technology that is based on both planar and
vertical (bulk & IMC) Hall plates. This technology allows the realization of Hall effect sensors able to sense
the flux density along the 3 axis (i.e. X, Y & Z) as well as position sensors able to sense the magnetic vector
over 360 degrees.
IMC: Integrated Magneto Concentrator. It concentrates the magnetic flux lines and bends them at the
extremity under the planar Hall plate. Furthermore, it can provide some magnetic gain factor.
TM
4 Maximum ratings
Parameter
Units
Supply Voltage, V
DD
(overvoltage)
6V
Supply Voltage, V
DD
(operating)
5.5V
Reverse Voltage Protection
0V
Operating Temperature Range, T
A
-40 to +125°C
Storage Temperature Range, T
S
-40 to +150°C
Table 1: Absolute maximum ratings
Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute maximum
rated conditions for extended periods may affect device reliability.
5 Pin definitions and descriptions
Pin Number
1
2
3
4
Pin Name
A_out
VDD
NC
PV
Function
Analog Output
Supply
Factory Programming Pin (default VDD)
Pin 1
B
5
GND
Supply Common
6
PD
Factory Programming Pin (default GND)
7
PC
Factory Programming Pin (default VDD)
8
CO_out
Common Output (VDD/2)
Table 2: Pin description MLX91205
Magnetic sensitive direction
3901091205
Rev 010
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Data Sheet
Jun/09
MLX91205
IMC Current Sensor (Triaxis™ Technology)
6 MLX91205 General Electrical Specifications
DC Operating Parameters T
A
= -40
o
C to +125
o
C, V
DD
= 5.000V (unless otherwise specified)
Parameter
Symbol
Nominal Supply Voltage
Vdd
Supply Current
Idd
Common Output
CO_Out
Output Current
Iout
Output Load Resistance
Rload
Output Load Capacitance
Cload
Start-up cycle
Ts
Table 3: Electrical specifications
Test Conditions
Iout=0mA
Referring to VDD/2
Min
4.5
-50
-1
5
Typ
5
10
VDD/2
Max
5.5
16
+50
1
Units
V
mA
mV
mA
k
pF
µs
1000
150
7 MLX91205 Sensor Specific Specifications
7.1 91205 LB: Low Field version 10mT (marking xxL)
DC Operating Parameters T
A
= -40 C to 125 C, V
DD
= 5.000V, differential output (i.e. Vout = A_out - CO_out),
unloaded. Unless otherwise specified.
Parameter.
Magnetic Sensitivity
Magnetic Sensitivity over Temp.
Thermal Sensitivity Drift
Offset Voltage
o
o
Symbol Test Conditions
S
(1)
S
T(1)
TC
Voff
Min
275
260
-20
-50
-7.5
Typ
280
280
<+/-200
0
Max
285
300
20
50
7.5
Units
V/T
V/T
ppm/°C
mV
T=25°C, B = B
L
T= -40, 25, 125°C;
See also below 10.2
T= 25°C
T= 25°C
Offset Voltage over Temperature
Linear Magnetic Field Range
Fullscale Magnetic Field Range
Non Linearity
Hysteresis
Max. Output Voltage Swing
Response Time
Bandwidth (-3 dB) DC to
Spectral Noise Density
Voff
T
B
L
B
FS
NL
Hyst
Vout,max
tr
BW
∆Bnoise
T= -40, 25, 125°C;
See also below 10.1
0
mV
mT
mT
%
(2)
µT
%VDD
µs
kHz
nT/sqrt(Hz)
B<B
L
B<100mT
B>B
FS
R
Load
>1M ; C
Load
<10pF
f=10Hz to 10kHz
±10
±0.5
<±10
5
8
100
<125
95
Table 4: Sensor specifications 10mT version (low-field version)
Note 1: Ratiometric (proportional to Vdd). The absolute accuracy on magnetic sensitivity trimming is +/- 2%.
Note 2: Deviation to a best fit straight line, related full linear input range, i.e. 15mT.
3901091205
Rev 010
Page 4 of 13
Data Sheet
Jun/09
MLX91205
IMC Current Sensor (Triaxis™ Technology)
7.2 91205HB: High Field version 25mT (marking xxH)
DC Operating Parameters T
A
= -40
o
C to 125
o
C, V
DD
= 5.000V, differential output (i.e. Vout = A_out - CO_out),
unloaded. Unless otherwise specified.
Parameter.
Magnetic Sensitivity
Magnetic Sensitivity over Temp.
Thermal Sensitivity Drift
Offset Voltage
Symbol Test Conditions
S
(1)
T=25°C, B = B
L
T= -40, 25, 125°C;
S
T(1)
See also below 10.2
TC
Voff
T= 25°C
T= 25°C
T= -40, 25, 125°C;
See also below 10.1
Min
98.5
93
-20
-50
-20
Typ
100
100
<+/-200
0
Max
101.5
107
20
50
20
Units
V/T
V/T
ppm/°C
mV
Offset Voltage over Temperature
Linear Magnetic Field Range
Fullscale Magnetic Field Range
Non Linearity
Hysteresis
Max. Output Voltage Swing
Response Time
Bandwidth (-3 dB) DC to
Spectral Noise Density
Voff
T
B
L
B
FS
NL
Hyst
Vout,max
Tr
BW
∆Bnoise
0
±25
±0.5
<±20
mV
mT
mT
%
(2)
µT
%VDD
µs
kHz
nT/sqrt(Hz)
B<B
L
B<100mT
B>B
FS
R
Load
>1M ; C
Load
<10pF
f=10Hz to 10kHz
5
8
100
<125
95
Table 5: Sensor specifications 25mT version (high-field version)
Note 1: Ratiometric (proportional to Vdd). The absolute accuracy on magnetic sensitivity trimming is +/- 2%.
Note 2: Deviation to a best fit straight line, related full linear input range, i.e. 40mT.
3901091205
Rev 010
Page 5 of 13
Data Sheet
Jun/09
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