MLX91208
IMC-Hall® Current Sensor (Triaxis®Technology)
1.
Features and Benefits
Triaxis® Technology
Very high sensitivity due to Integrated
Magnetic Concentrator (IMC-Hall®)
Programmable high speed current sensor IC
Wideband: DC to 250kHz
Short response time 3us
Programmable linear transfer characteristic
Selectable Analog ratiometric output
SOIC8 package RoHS compliant
Lead free component, suitable for lead free
soldering profile 260°C (target), MSL3
AEC-Q100 Automotive Qualified
3.
Description
The MLX91208 is a monolithic sensor IC featuring the
Tria⊗is™ Hall technology. Conventional planar Hall
technology is only sensitive to the flux density applied
orthogonally to the IC surface. The IMC-Hall® current
sensor is sensitive to the flux density applied parallel to the
IC surface. This is obtained through an Integrated Magneto-
Concentrator (IMC-Hall®) which is deposited on the CMOS
die (as an additional back-end step). The IMC-Hall®
technology is automotive qualified.
The product is a single chip Hall sensor which provides an
output signal proportional to the flux density applied
horizontally and is therefore suitable for current
measurement. It is ideally suited as an open loop current
sensor for PCB or bus bar mounting. It features small size
application design and a simple construction for various
current ranges from few Amperes up to 1000 Amperes.
The transfer characteristic of the MLX91208 is
programmable in terms of offset, gain or temperature
compensation. The linear analog output is designed for
applications where a very fast response is required, such as
inverter applications.
2.
Application Examples
Inverter HEV and EV
BLDC motor current monitoring
Smart fuse (over-current detection)
AC/DC Converters
DC/AC Converter (inverter)
DC/DC switched mode power supply
AC/D
Figure 2: Block diagram
Figure 1: Typical application of MLX91208
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MLX91208
IMC-Hall
®
Current Sensor (Triaxis
®
Technology)
4.
Ordering Information
Product
ML91208
ML91208
ML91208
ML91208
Temperature
L (-40°C to 150°C)
L (-40°C to 150°C)
L (-40°C to 150°C)
L (-40°C to 150°C)
Package
DC
DC
DC
DC
Option Code
CAL - 000
CAH - 000
CAV - 000
CAV - 001
Packing Form
TU/RE
TU/RE
TU/RE
TU/RE
Sensitivity Range (typ.)
100-700mV/mT (250mV/mT)
50-300mV/mT (100mV/mT)
30-200mV/mT (40mV/mT)
30-200mV/mT (60mV/mT)
Table 1: Ordering Information
Legend:
Temperature Code:
Package Code:
Option Code:
L: from -40°C to 150°C
“DC” for SOIC-8 package
CAL : Low field version
CAH : High field version
CAV : Very high field version
“RE” for Reel, “TU” for Tube
“MLX91208LDC-CAH-000-RE”
Table 2: Legend
Packing Form:
Ordering Example:
5.
Glossary of Terms
Terms
Tesla
TC
NC
ADC
DAC
LSB
MSB
DNL
INL
IMC
PTC
Definition
Units for the magnetic flux density, 1 mT = 10 Gauss
Temperature Coefficient in ppm/deg C
Not Connected
Analog to Digital Converter
Digital to Analog Converter
Least Significant Bit
Most Significant Bit
Differential Non Linearity
Integral Non Linearity
Integrated Magneto Concentrator (IMC®)
Programming Through Connector
Table 3: Glossary of terms
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MLX91208
IMC-Hall
®
Current Sensor (Triaxis
®
Technology)
Contents
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1. Features and Benefits ............................................................................................................................ 1
2. Application Examples............................................................................................................................. 1
.............................................................................................................................
................................................................
................................................................................................................................
3. Description ............................................................................................................................................ 1
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............................................................................................................................
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4. Ordering Information ............................................................................................................................ 2
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5. Glossary of Terms .................................................................................................................................. 2
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6. Absolute Maximum Ratings ................................................................................................................... 5
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7. Pin Definitions and Descriptions ............................................................................................................ 5
8. General Electrical Specifications ............................................................................................................ 6
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9. Magnetic specification........................................................................................................................... 7
9.1. Low Field Version 10mT (marking xxL) .............................................................................................. 7
9.2. High Field Version 25mT (marking xxH)............................................................................................. 7
9.3. Very High Field Version 60mT (marking xxV) .................................................................................... 8
.................................................................................................................
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10. Analog output specification ................................................................................................................. 8
10.1. Timing specification .......................................................................................................................... 8
10.2. Accuracy specification ...................................................................................................................... 9
10.3. Remarks to the achievable accuracy ............................................................................................... 9
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11. Programmable items ......................................................................................................................... 10
11.1. Parameter table .............................................................................................................................. 10
11.2. Sensitivity programming (RG, FG) .................................................................................................. 10
11.3. Offset / output quiescent voltage programming (VOQ) ............................................................... 10
11.4. Output ratiometry (ENRATIO) ........................................................................................................ 10
11.5. Sensitivity temperature drift programming (TC1ST, TC2ND_COLD, TC2ND_HOT) ..................... 11
11.6. Offset temperature drift programming (OFFDR2C, OFFDR2H) .................................................... 11
11.7. Noise filter (NOISEFILT) .................................................................................................................. 11
11.8. Identification code (ID) ................................................................................................................... 11
Self-
................................................................................................................................
...................................................................................................
12. Self-diagnostic ................................................................................................................................... 12
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13. Application information ..................................................................................................................... 12
13.1. Low current measurement ±2-10A................................................................................................ 12
13.2. Medium current measurement up to ±50A .................................................................................. 13
13.3. High current measurement up to ±1000A .................................................................................... 13
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14. Recommended Application Diagrams ................................................................................................ 14
14.1. Resistor and capacitor values......................................................................................................... 14
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IMC-Hall
®
Current Sensor (Triaxis
®
Technology)
14.2. Pull-up/down resistor for diagnostic high/low ............................................................................. 14
..........................................................................................................................
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15. Typical performance .......................................................................................................................... 15
16. Standard information regarding manufacturability of Melexis products with different soldering
with
................................................................................................................................
............................................................................................................
processes............................................................................................................................................ 16
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17. ESD Precautions................................................................................................................................. 16
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18. Package information.......................................................................................................................... 17
18.1. SOIC-8 Package Dimensions ........................................................................................................... 17
18.2. SOIC-8 Pinout and Marking ............................................................................................................ 17
18.3. SOIC-8 Hall plate position ............................................................................................................... 17
18.4. SOIC-8 IMC Position and magnetic sensitive direction ................................................................. 18
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19. Disclaimer .......................................................................................................................................... 19
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MLX91208
IMC-Hall
®
Current Sensor (Triaxis
®
Technology)
6.
Absolute Maximum
Ratings
Parameters
Positive Supply Voltage
(overvoltage)
Reverse Supply Voltage Protection
Positive Output Voltage
Output Current
Reverse Output Voltage
Reverse Output Current
Package Thermal Resistance
Operating Ambient Temperature
Range
Storage Temperature Range
Magnetic Flux Density
Rth
TA
TS
Iout
Symbol
Vdd
Value
+10
-0.3
+10
±70
-0.3
-50
105
-40 to 150
-55 to 165
infinite
Units
V
V
V
mA
V
mA
°C/W
°C
°C
T
Table 4: 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.
7.
Pin Definitions and Descriptions
Pin №
5
3
1
4
6
Name
VDD
VSS
VDEC
TEST/MUST
OUT
Type
Supply
Ground
Digital
Digital
Analog
Function
Supply Voltage
Supply Voltage
Digital supply voltage
Test and Factory calibration
Current sensor output
Table 5: PIN definitions and descriptions
It is recommended to connect the unused pins to the Ground for optimal EMC results.
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