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IMC-Hall Current Sensor (Triaxis Technology)

MLX91206

Features and Benefits



Triaxis® Technology



Very high sensitivity due to Integrated

Magnetic Concentrator (IMC-Hall®)



Programmable high speed current sensor IC



Wideband: DC to 90kHz



Short response time



Programmable linear transfer characteristic



Selectable



analog ratiometric output



PWM output with 12 bit resolution



Thermometer output



17 bit ID Number



SOIC8 package RoHS compliant



Lead free component, suitable for lead free

soldering profile 260°C (target), MSL3

Application Examples



DC/AC (inverter) converter

DC/DC switched mode power supply

Battery Management

Smart fuse (over-current detection)

BLDC motor (phase current)

AC/DC Converters

Ordering Information

Product

Code

MLX91206

Temperature

Code

L (-40°C to 150°C)

Package

Code

DC (SOIC)

Ordering

Option Code

CAL-001

CAL-002

CAL-003

CAH-001

CAH-002

CAH-003

CAH-004

(1)

CAH-021

(2)

CAH-104

Packing

form Code

Sensitivity Range

(Typ.)

460-700mV/mT (580mV/mT)

300-470mV/mT (380mV/mT)

200-310mV/mT (250mV/mT)

210-330mV/mT (270mV/mT)

130-220mV/mT (170mV/mT)

80-140mV/mT (110mV/mT)

60-110mV/mT (77.5mV/mT)

210-330mV/mT (270mV/mT)

0.5-5%DC/mT

TU (Tube) / RE (Reel)

(1)

The MLX91206 sensor is in disabledratiometry mode by default for this version

(2)

The MLX91206 sensor is in PWM mode by default for this version

Ordering example: MLX91206LDC-CAL-001-RE

1 Functional Diagram

3.3V core

TEMPOUT

3.3V

ana

Thermometer

3.3V

dig

Voltage

Regulator

Rev.Pol.

protection

VDIG

VDD

Oscillator

Clock

1 MHz

Generator

fs = 1MHz

Input data rate

fi = 250kHz or 25kHz

Intermediate data rate

fo = 250 kHz or 25 kHz

Output data rate

5V ratiometric

output

VSS

Phase

Switch

Box

DIDO

Integrating

P2P

LPF

S&H

Clamping

Output

Buffer

OUT

G = 15 … 239

Hall

Bias

G = 0.4 … 1

G=4

ADC

PWM Logic

DAC

3 bits

10 bits

2 bits

12 bits

6 bits

Digital

Ratiometry

MUST0

TC1ST[6:0]

TC2ND_COLD[4:0]

TC2ND_HOT[4:0]

RG[2:0]

FG[9:0]

OFFSETDRIFT_HOT[5:0]

OFFSETDRIFT_COLD[5:0]

PLATEPOL

FILTCODE[1:0] XA[11:0] CLAMPLOW[2:0]

CLAMPHIGH[2:0]

MUST1

Polarity

selection

HallSensors

selection

Sensitivity

trimming

DIGITAL + EEPROM

Rough Gain

Fine Gain

Offset

Compensation

Bandwidth

Voq adjust

TESTOUT

Figure 1: Block diagram

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Datasheet MLX91206

April 2016

IMC-Hall Current Sensor (Triaxis Technology)

MLX91206

2 General Description

The MLX91206 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® current sensor is automotive qualified.

The product is a single chip Hall sensor which provides an output signal which is proportional to the flux

density applied horizontally and is therefore suitable for current measurement. It is ideally used as an open

loop current sensor for PCB mounting. (see figure 2). It features small size application design and a simple

construction for various current ranges.

The transfer characteristic of the MLX91206 is programmable (offset, gain, clamping levels, diagnostic

functions…). The output is selectable between analog and PWM. The linear analog output is used for

application where a very fast response (<10

sec)

is required, whereas the PWM output is used for

application where low speed but high output signal robustness is required.

Figure 2: Typical application of MLX91206

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Datasheet MLX91206

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IMC-Hall Current Sensor (Triaxis Technology)

MLX91206

Table of Contents

1 Functional Diagram................................................................................................................................................................................ 1

2 General Description ............................................................................................................................................................................... 2

3 Glossary of Terms ................................................................................................................................................................................. 4

4 Absolute Maximum Ratings ................................................................................................................................................................... 4

5 Pin Definitions and Descriptions ............................................................................................................................................................ 4

6 General Electrical Specifications ............................................................................................................................................................ 5

7 Magnetic specification ........................................................................................................................................................................... 6

7.1 25 mT version (marking xxH) .......................................................................................................................................................... 6

7.2 10 mT version (marking xxL) ......................................................................................................................................................... 6

8 Analog output specification .................................................................................................................................................................... 7

8.1 Timing specification ........................................................................................................................................................................ 7

8.2 Accuracy specification .................................................................................................................................................................... 7

8.3 Remarks to the achievable accuracy .............................................................................................................................................. 7

9 PWM output specification ...................................................................................................................................................................... 8

9.1 Timing specification for the PWM output ......................................................................................................................................... 8

9.2 Magnetic specification for the PWM output ..................................................................................................................................... 9

9.3 Accuracy specification transfer characteristic PWM ........................................................................................................................ 9

10 Thermometer output specification ........................................................................................................................................................ 9

11 Programmable items .......................................................................................................................................................................... 10

11.1 Parameter table .......................................................................................................................................................................... 10

11.2 Output mode configuration (DSPMODE, OUTMODE) ................................................................................................................ 11

11.3 Output impedance mode (DIAGINFAULT) .................................................................................................................................. 11

11.4 Reference edge (REFEDGE) – only in PWM mode .................................................................................................................... 11

11.5 PWM/switch mode (SWITCH)..................................................................................................................................................... 11

11.6 Platepol (PLATEPOL)................................................................................................................................................................. 12

11.7 Sensitivity programming (ROUGHGAIN, FINEGAIN) .................................................................................................................. 12

11.8 Offset / output quiescent voltage programming (XA, YA) ............................................................................................................ 13

11.9 Clamping level programming (CLAMPLOW, CLAMPHIGH) ........................................................................................................ 13

11.10 Bandwidth and filter programming (FILTCODE) ........................................................................................................................ 14

11.11 Power limitation / PWM rise and fall time (OUTSLOPE)............................................................................................................ 15

11.12 PWM Mode duty cycle definition (DCDEF) ............................................................................................................................... 16

11.13 Output ratiometry (RATIODIS) .................................................................................................................................................. 16

11.14 Sensitivity and temperature drift programming (TC1ST, TC2ND_COLD, TC2ND_HOT) ........................................................... 16

11.15 Offset temperature drift programming (OFFDRIFT_COLD, OFFDRIFT_HOT) .......................................................................... 16

11.16 Product Identification (MLXID, CSTID)...................................................................................................................................... 17

12 Application information....................................................................................................................................................................... 18

12.1 Low current measurement up to ±2 A ......................................................................................................................................... 18

12.2 Medium current up to ±30 A ....................................................................................................................................................... 18

12.3 High current measurement up to ±600 A .................................................................................................................................... 18

13 Recommended Application Diagrams ................................................................................................................................................ 19

13.1 Resistor and capacitor values ..................................................................................................................................................... 19

13.2 Fast analog application, pull-down resistor for diagnostic low ..................................................................................................... 19

13.3 Fast analog application, pull-up resistor for diagnostic high ........................................................................................................ 20

13.4 Robust PWM application, (pull-up load only) .............................................................................................................................. 20

14 Standard information regarding manufacturability of Melexis products with different soldering processes .......................................... 21

15 ESD Precautions ............................................................................................................................................................................... 21

16 Package Information .......................................................................................................................................................................... 22

16.1 SOIC8 Package dimensions ....................................................................................................................................................... 22

16.2 SOIC8 Pinout and Marking ......................................................................................................................................................... 22

16.3 SOIC8 Hall plate position............................................................................................................................................................ 23

16.4 IMC Position and sensors active measurement direction ............................................................................................................ 23

17 Related documents and tools............................................................................................................................................................. 24

17.1 Related documents .................................................................................................................................................................... 24

17.2 Related software ........................................................................................................................................................................ 24

17.3 Related hardware ....................................................................................................................................................................... 24

18 Disclaimer.......................................................................................................................................................................................... 25

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Datasheet MLX91206

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IMC-Hall Current Sensor (Triaxis Technology)

MLX91206

3 Glossary of Terms

Tesla

PWM

%DC

ADC

DAC

LSB

MSB

DNL

INL

IMC

PTC

Units for the magnetic flux density, 1 mT = 10 Gauss

Temperature Coefficient in ppm/deg C

Not Connected

Pulse Width Modulation

Duty Cycle of the output signal i.e. T

/(T

+ T

OFF

)

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

4 Absolute Maximum Ratings

Parameter

Positive Supply Voltage (overvoltage)

Reverse Supply Voltage Protection

Positive Output Voltage

Output Current

Reverse Output Voltage

Reverse Output Current

Operating Ambient Temperature Range

Storage Temperature Range

Magnetic Flux Density

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.

Symbol

Vdd

Value

+20

-10

+10

+14 (200 s max, T

= +25°C)

±300

-0.3

-50

-40 to +150

-55 to +165

±0.2

Units

°C

Iout

5 Pin Definitions and Descriptions

Pin №

Name

VDD

VSS

VDIG

MUST1

OUT / PWM

TESTOUT

MUST0

TEMPOUT

Type

Supply

Ground

Supply

Digital

Analog/Digital

Digital

Analog

Function

Supply Voltage

Digital supply voltage, 3.3 V, internal regulated

Test and Factory calibration

Current sensor output

Test and Factory calibration

Temperature Sensor Output

Table 2: Pin definition and description

It is recommended to connect the unused pins to the Ground (see section 16) for optimal EMC results.

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Datasheet MLX91206

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IMC-Hall Current Sensor (Triaxis Technology)

MLX91206

6 General Electrical Specifications

Operating Parameters : T

= -40 to 125degC, Vdd = 4.5 V to 5.5 V, Iout = -2 mA to +2 mA, recommended

application diagram in section 16, unless otherwise specified. All mentioned component values can have a

±20% tolerance

Parameter

Nominal Supply Voltage

Supply Current

Symbol

Vdd

Idd

Test Conditions

W/o output load & T

= -40 to 150

- ROUGHGAIN ≤ 3

- ROUGHGAIN > 3

-2

Vout = 50% Vdd, R

= 5kΩ

Analog Mode

PWM Mode

Output shorted to Vdd- Permanent

Output shorted to Vss - Permanent

High impedance mode

(2)

Min

4.5

Typ

Max

5.5

Units



Output Current

Output Resistance

Output Capacitive Load

Output Short Circuit Current

Leakage current

Output Voltage Swing (Linear

Range)

High-impedance mode levels

(2)

BrokenVss Output Levels

(2)

BrokenVdd Output Levels

(2)

Under-voltage detection

(2) (4)

Over-voltage detection mode 1

(2) (4)

Iout

load

short

leak

Not Destroyed

%Vdd

out_pd

pull down ≥ 10 kΩ

out_pu

pull up ≥ 10 kΩ

out_HiZ_pu

pull-up R

≤ 30 kΩ

out_HiZ_pd

pull-down R

≤ 30 kΩ

OUT with pull-down R

≤ 10 kΩ

(3)

OUT with pull-up R

≤ 30 kΩ

(3)

OUT with pull-down R

≤ 30 kΩ

(3)

OUT with pull-up R

≤ 30 kΩ

(3)

dd_uvd

Detected Voltage (Low to High)

dd_uvh

Hysteresis

dd_ovd1

Detected Voltage (Low to High)

dd_ovh1

Hysteresis

dd_ovd2

Detected Voltage (Low to High)

dd_ovh2

Hysteresis

Clamp_lo

Trimming Range

Clamp_hi

Trimming Range

3.15

0.25

7.8

0.8

6.7

0.05

(1)

3.3

0.3

3.45

0.4

9.5

1.6

7.6

0.5

(1)

Over-voltage detection mode 2

(2) (4)

Clamped Output Level

Table 3: General electrical parameter

(1)

(2)

(3)

(4)

Factory programmed clamping level

Refer to chapter

Self-diagnostic, table 21.

Valid for TEMPOUT with pull-up (min. 30kΩ), pull-down (min. 30kΩ) or not connected

According to the figure below

Vout

Hysteresis

Detected

Voltage

Vdd

Figure “Detected voltage and hysteresis definitions”

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Datasheet MLX91206

April 2016