MLX91205KDC-AAL-003-TU - Melexis

MLX91205

IMC-Hall®

Current Sensor (Triaxis®

Technology)

3901091205 Page 1 of 14 Data Sheet

Rev 012 June/13

Features and Benefits

 Triaxis® Technology

 Very high sensitivity due to integrated

magnetic concentrator ( IMC-Hall®)

 Sensitive to a magnetic field parallel to the

chip surface

 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 contact-less current

measurement

 Wideband Magnetic Field Measurement

 Battery Management

 AC/DC Converters

 Motor Control

 Solar Power Converter (MPPT)

 Power Management

Ordering Information

Product

Code

Temperature

Code

Package

Code

Ordering

Option Code

Packing

form Code

Sensitivity

(Typ.)

MLX91205

K (-40°C to 150°C)

DC (SOIC)

AAH-003

TU (Tube) / RE (Reel)

100 mV/mT

MLX91205

K (-40°C to 150°C)

DC (SOIC)

AAL-003

280 mV/mT

Ordering example: MLX91205KDC-AAH-003-TU

1 Functional diagram

CO_OUT

Biasing

Unit

Offset

Cancellation

Modulator Amplifier Demodulator

Buffer

Calibration Unit

PV PC PD

A_OUT

GNDVDD

Triais™

2 General description

The new IMC-Hall® 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

(IMC-Hall® = Integrated Magnetic Concentrator,

Triaxis® Technology) 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 ±25mT and the 91205LB features a linear

range of ±10mT. HB refers to a high magnetic

field, whereas LB refers to a low magnetic field

range.

MLX91205

IMC-Hall®

Current Sensor (Triaxis®

Technology)

3901091205 Page 2 of 14 Data Sheet

Rev 012 June/13

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

7 MLX91205 Sensor Specific Specifications ................................................................... 4

7.1 91205 LB: Low Field version 10mT (marking xxL) .......................................................................................................................... 4

8 ........................................................................................................................................... 4

8.1 91205HB: High Field version 25mT (marking xxH) ......................................................................................................................... 5

9 Detailed General Description ......................................................................................... 6

10 Unique Features ............................................................................................................ 6

11 Performance Graphs .................................................................................................... 7

11.1 Offset over Temperature .............................................................................................................................................................. 7

11.2 Sensitivity over Temperature ........................................................................................................................................................ 7

12 Applications Information .............................................................................................. 8

12.1 Low current measurement up to ±2 A ........................................................................................................................................... 8

12.2 Medium current up to ±30 A ......................................................................................................................................................... 8

12.3 High current measurement up to ±600 A ...................................................................................................................................... 8

12.4 Customer Calibration with MCU .................................................................................................................................................... 9

13 Application Diagram ................................................................................................... 10

13.1 Direct Single Ended Output ........................................................................................................................................................ 10

13.2 Direct Differential Output ............................................................................................................................................................ 10

14 Standard information regarding manufacturability of Melexis products with

different soldering processes ......................................................................................... 11

15 ESD Precautions ......................................................................................................... 12

16 Package Information ................................................................................................... 12

16.1 Package Dimensions .................................................................................................................................................................. 12

16.2 Pinout and marking .................................................................................................................................................................... 13

16.3 Hall plate positioning .................................................................................................................................................................. 13

17 Disclaimer .................................................................................................................... 14

MLX91205

IMC-Hall®

Current Sensor (Triaxis®

Technology)

3901091205 Page 3 of 14 Data Sheet

Rev 012 June/13

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isTM : 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.

4 Maximum ratings

Parameter

Units

Supply Voltage, VDD (overvoltage)

Supply Voltage, VDD (operating)

5.5V

Reverse Voltage Protection

Operating Temperature Range, TA

-40 to +125 C

Storage Temperature Range, TS

-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

Pin Name

Function

Pin 1

A_out

Analog Output

VDD

Supply

Factory Programming Pin (default VDD)

GND

Supply Common

Factory Programming Pin (default GND)

Factory Programming Pin (default VDD)

CO_out

Common Output (VDD/2)

Table 2: Pin description MLX91205

Magnetic sensitive direction

MLX91205

IMC-Hall®

Current Sensor (Triaxis®

Technology)

3901091205 Page 4 of 14 Data Sheet

Rev 012 June/13

6 MLX91205 General Electrical Specifications

DC Operating Parameters TA = -40oC to +125oC, VDD = 5.000V (unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

Nominal Supply Voltage

Vdd

4.5

5.5

Supply Current

Idd

Iout=0mA

Common Output

CO_Out

Referring to VDD/2

-50

VDD/2

+50

Output Current

Iout

-1

Output Load Resistance

Rload

kΩ

Output Load Capacitance

Cload

1000

Start-up cycle

150

μs

Table 3: Electrical specifications

7 MLX91205 Sensor Specific Specifications

7.1 91205 LB: Low Field version 10mT (marking xxL)

DC Operating Parameters TA = -40oC to 125oC, VDD = 5.000V, differential output (i.e. Vout = A_out -CO_out),

unloaded. Unless otherwise specified.

Parameter.

Symbol

Test Conditions

Min

Typ

Max

Units

Magnetic Sensitivity

S(1)

T=25°C, B = BL

275

280

285

V/T

Magnetic Sensitivity over Temp.

ST(1)

T= -40, 25, 125°C;

See also below 11.1

-50

Linear Magnetic Field Range

-20

Fullscale Magnetic Field Range

BFS

-25.. 25

Non Linearity

B<BL

±0.5

Hysteresis

Hyst

B<100mT

<±20

μT

Max. Output Voltage Swing

Vout,max

B>BFS

%VDD

Response Time

μs

Bandwidth (-3 dB) DC to

RLoad>1MΩ; CLoad<10pF

100

kHz

Spectral Noise Density

ΔBnoise

f=10Hz to 10kHz

<125

nT/sqrt(Hz)

Table 5: Sensor specifications 25mT version (high-field version)

Note 1: Ratiometric (proportional to Vdd). The absolute accuracy on magnetic sensitivity trimming is +/- 2%.

MLX91205

IMC-Hall®

Current Sensor (Triaxis®

Technology)

3901091205 Page 6 of 14 Data Sheet

Rev 012 June/13

9 Detailed General Description

Melexis IMC current sensor MLX91205 is a single axis magnetic field sensor based on the Hall Effect. It is an

integrated combination of a CMOS Hall circuit and a thin ferromagnetic concentrator. The CMOS circuit

contains two pairs of Hall elements for its sensitivity direction parallel with the chip surface. The ferromagnetic

concentrator amplifies the external magnetic field and concentrates it on the Hall elements.

The MLX91205 is ideally suited for current sensing in harsh automotive and industrial environments for both

AC and DC currents. 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 and the ferromagnetic layer is added in a simple

post-processing step. The monolithic device incorporates Hall elements, offset cancellation circuitry, current

source, chopper stabilized amplification circuitry, parameter programming capability.

By dynamic offset cancellation any offset voltage caused by temperature variations, packaging stress or

others is strongly reduced. As a result, the device has an extremely stable signal output, is immune to

mechanical stress and is virtually immune to temperature cycling.

Therefore, the circuit features a wide application range and very high accuracy.

10 Unique Features

Different to other linear Hall sensors the MLX91205 measures the magnetic field parallel with the chip

surface.

Therefore this sensor is ideally used as an open-loop current sensor for PCB mounting. It features small size

application design and a simple construction for various current ranges.

Due to short Response time and high Bandwidth this sensor is suitable for high speed current

measurement in a contactless, high current, high voltage setup.

MLX91205

IMC-Hall®

Current Sensor (Triaxis®

Technology)

3901091205 Page 7 of 14 Data Sheet

Rev 012 June/13

11 Performance Graphs

11.1 Offset over Temperature

The product is calibrated at room temperature and tested at -40°C, 25°C and +125°C. The Offset

performance 0V ±20mV at room temperature and is 0V ±50mV over the temperature range from -40 to 125°

C. The typical temperature drift is < 0mV/°C ± 0.3 mV/°C

25 50 75 100 125

-60

-40

-20

Temperature [°C]

-50 -25

Offset

[mV] [%VDD]

1.2

0.8

0.4

-0.4

-0.8

-1.2

11.2 Sensitivity over Temperature

The product is calibrated at room temperature and tested at -40°C, 25°C and +125°C. The Sensitivity

performance for the low field version is 280V/T ±5 V/T at room temperature and 280V/T ±10 V/T over the

temperature range from -40 to 125° C. Typical temperature drift is < 200 ppm/ °C.

285

290

Sensitivity

25 75 100 125

270

275

Temperature [°C]

-50 -25

101.8

103.6

[V/T] [%]

96.4

98.2

The corresponding sensitivity performance for the high field version is 100V/T ±2.5 V/T at room temperature

and 100V/T ±5 V/T over the temperature range from -40 to 125° C.

MLX91205

IMC-Hall®

Current Sensor (Triaxis®

Technology)

3901091205 Page 8 of 14 Data Sheet

Rev 012 June/13

12 Applications Information

12.1 Low current measurement up to ±2 A

Low currents can be measured with the MLX91205 by

increasing the magnetic field via a coil around the sensor.

The sensitivity (output voltage vs. current in coil) of the

measurement will depend on the size of coil and number

of turns. Additional sensitivity and increased immunity to

external fields can be gained by adding a shield around

the coil. The bobbin provides very high dielectric isolation

making this a suitable solution for high voltage power

supplies with relative low currents. The output should be

scaled to obtain the maximum voltage for the highest

current to be measured in order to obtain the best

accuracy and resolution.

12.2 Medium current up to ±30 A

With a single conductor located on the PCB, currents in

the range of up to 30 amps can be measured. The sizing

of the PCB trace needs to take into account the current

handling capability and the total power dissipation. The

PCB trace needs to be thick enough and wide enough to

handle the RMS current continuously.

The differential output voltage for this configuration can be

approximated by the following equation:

Vout = typ. 35 - 40 mV/A * I

For a current level of 30 A, the output will be approximately

1050 mV.

12.3 High current measurement up to ±600 A

Another method of measuring high currents on PCB’s is to

use a large thick gauge copper trace capable of carrying

the current on the opposite side of the PCB. The

MLX91205 should be located near the centre of the trace,

however because the trace is wide, the output is less

sensitive to location on the PCB. This configuration also

has less sensitivity due to the distance and width of the

conductor.

MLX91205

IMC-Hall®

Current Sensor (Triaxis®

Technology)

3901091205 Page 9 of 14 Data Sheet

Rev 012 June/13

12.4 Customer Calibration with MCU

In many applications one measures the output voltage of the 91205 with a microcontroller. The current-

sensor-system accuracy can be significantly increased by customer calibration of the system after

assembling the 91205 in the application. By applying a known current i.e.100 Amperes, one can calibrate by

means of the microcontroller the output voltage to the exact value i.e. 2.000V at 100 Amps. By doing so, the

offset and sensitivity can be calibrated simply at a certain temperature.

MLX91205

IMC-Hall®

Current Sensor (Triaxis®

Technology)

3901091205 Page 10 of 14 Data Sheet

Rev 012 June/13

13 Application Diagram

13.1 Direct Single Ended Output

For reliable operation within the specifications the sensor must be connected as follows:

MLX91205

Vdd

A_Out

+5V

100 nF*

CO_Out

GND

1 nF1 nF

GND

Full Scale Output =

2.5 +/-2.25 Volts

Vout = A_out

GND

* if the supply voltage is disturbed by EMI it can be useful to place a second capacitor (100pF ceramic)

parallel to the 100nF capacitor.

13.2 Direct Differential Output

For reliable operation within the specifications the sensor must be connected as follows:

MLX91205

Vdd

A_Out

+5V

100 nF*

CO_Out

GND

1 nF1 nF

Full Scale Output =

0 +/-2.25 Volts

Vout =

A_out - CO_out

GND GNDGNDGND

* if the supply voltage is disturbed by EMI it can be useful to place a second capacitor (100pF ceramic)

parallel to the 100nF capacitor.

MLX91205

IMC-Hall®

Current Sensor (Triaxis®

Technology)

3901091205 Page 11 of 14 Data Sheet

Rev 012 June/13

14 Standard information regarding manufacturability of Melexis

products with different soldering processes

Our products are classified and qualified regarding soldering technology, solderability and moisture sensitivity

level according to following test methods:

Reflow Soldering SMD’s (Surface Mount Devices)

IPC/JEDEC J-STD-020

Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices

(classification reflow profiles according to table 5-2)

EIA/JEDEC JESD22-A113

Preconditioning of Nonhermetic Surface Mount Devices Prior to Reliability Testing

(reflow profiles according to table 2)

Wave Soldering SMD’s (Surface Mount Devices) and THD’s (Through Hole Devices)

EN60749-20

Resistance of plastic- encapsulated SMD’s to combined effect of moisture and soldering heat

EIA/JEDEC JESD22-B106 and EN60749-15

Resistance to soldering temperature for through-hole mounted devices

Iron Soldering THD’s (Through Hole Devices)

EN60749-15

Resistance to soldering temperature for through-hole mounted devices

Solderability SMD’s (Surface Mount Devices) and THD’s (Through Hole Devices)

EIA/JEDEC JESD22-B102 and EN60749-21

Solderability

For all soldering technologies deviating from above mentioned standard conditions (regarding peak

temperature, temperature gradient, temperature profile etc) additional classification and qualification tests

have to be agreed upon with Melexis.

The application of Wave Soldering for SMD’s is allowed only after consulting Melexis regarding assurance of

adhesive strength between device and board.

Melexis is contributing to global environmental conservation by promoting lead free solutions. For more

information on qualifications of RoHS compliant products (RoHS = European directive on the Restriction Of

the use of certain Hazardous Substances) please visit the quality page on our website:

http://www.melexis.com/quality.aspx

MLX91205

IMC-Hall®

Current Sensor (Triaxis®

Technology)

3901091205 Page 12 of 14 Data Sheet

Rev 012 June/13

15 ESD Precautions

Electronic semiconductor products are sensitive to Electro Static Discharge (ESD).

Always observe Electro Static Discharge control procedures whenever handling semiconductor products. A

well designed (capacitors close to pins and low resistive ground layout) PCB layout will help to improve ESD

robustness.

16 Package Information

16.1 Package Dimensions

0.19

0.25

NOTES:

All dimensions are in millimeters (anlges in degrees).

* Dimension does not include mold flash, protrusions or

gate burrs (shall not exceed 0.15 per side).

** Dimension does not include interleads flash or protrusion

(shall not exceed 0.25 per side).

*** Dimension does not include dambar protrusion.

Allowable dambar protrusion shall be 0.08 mm total in

excess of the dimension at maximum material condition.

Dambar cannot be located on the lower radius of the foot.

5.84

6.20**

1.27 TYP

4.80

4.98*

1.55

1.73

0.127

0.250

1.40

1.55

0.35

0.49***

3.81

3.99**

0°

8°

0.41

0.89

MLX91205

IMC-Hall®

Current Sensor (Triaxis®

Technology)

3901091205 Page 13 of 14 Data Sheet

Rev 012 June/13

16.2 Pinout and marking

Top Marking :

Part Number MLX91205 (5 digits)

91205 Die Version (2 digits)

X = L for low field version

X = H for high field version

ABX

Lot number (5 digits)

Week Date code (2 digits)

Year Date code (2 digits)

YY WW

A_OUT

CO_OUT

VDD PC

GND

91205

ABX

12345

Bottom Marking :

16.3 Hall plate positioning

1.85

2.15

2.35

2.55

0.46 +/- 0.06

MLX91205

IMC-Hall®

Current Sensor (Triaxis®

Technology)

3901091205 Page 14 of 14 Data Sheet

Rev 012 June/13

17 Disclaimer

Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in its

Term of Sale. Melexis makes no warranty, express, statutory, implied, or by description regarding the

information set forth herein or regarding the freedom of the described devices from patent infringement.

Melexis reserves the right to change specifications and prices at any time and without notice. Therefore, prior

to designing this product into a system, it is necessary to check with Melexis for current information. This

product is intended for use in normal commercial applications. Applications requiring extended temperature

range, unusual environmental requirements, or high reliability applications, such as military, medical life-

support or life-sustaining equipment are specifically not recommended without additional processing by

Melexis for each application.

The information furnished by Melexis is believed to be correct and accurate. However, Melexis shall not be

liable to recipient or any third party for any damages, including but not limited to personal injury, property

damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential

damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical

data herein. No obligation or liability to recipient or any third party shall arise or flow out of Melexis’ rendering

of technical or other services.

For the latest version of this document, go to our website at

www.melexis.com

Or for additional information contact Melexis Direct:

Europe, Africa, Asia: America:

Phone: +32 1367 0495 Phone: +1 248 306 5400

E-mail: sales_europe@melexis.com E-mail: sales_usa@melexis.com

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