MLX90215LVA-AAA-111-BU - Melexis

MLX90215

Precision Programmable Linear Hall Effect Sensor

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1. Features and Benefits

 Programmable Linear Hall IC

 Quad Switched / Chopper Stabilized

 Ratiometric Output for A/D Interface

 Adjustable Quiescent Voltage (VOQ )

 Very Low Quiescent Voltage Temperature

Drift

 Adjustable Sensitivity

 Adjustable Temperature Compensation of

Sensitivity

2. Application Examples

 Rotary position sensor

 Linear position sensor

 Current sensing

3. Ordering information

Product Code

Temperature Code

Package Code

Option Code

Packing Form Code

MLX90215

AAA-106

MLX90215

AAA-111

Legend:

Temp. Code: E for Temperature Range: -40C to +85C

L for Temperature Range: -40C to +150C

Package Code: VA for Plastic Single in Line Thickness 1.5mm- 1.6mm

Packing Form Code: BU for bulk

Ordering Example: MLX90215EVA-AAA-106-BU

MLX90215

Position Programmable Linear Hall Effect Sensor

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Contents

1. Features and Benefits ............................................................................................................................. 1

2. Application Examples ............................................................................................................................. 1

3. Ordering information ............................................................................................................................. 1

4. Functional Diagram ................................................................................................................................ 3

5. Description ............................................................................................................................................. 3

6. Electrical specifications .......................................................................................................................... 4

7. How does it work? .................................................................................................................................. 5

8. MLX90215 Performance ......................................................................................................................... 8

9. Melexis Programmer .............................................................................................................................. 9

10. Absolute Maximum Ratings ................................................................................................................ 10

11. Clamping the Output Voltage ............................................................................................................. 12

12. Application comments ........................................................................................................................ 12

13. Installation Comments ....................................................................................................................... 12

14. Physical Characteristics ...................................................................................................................... 13

15. Standard Information ......................................................................................................................... 14

16. ESD Precautions ................................................................................................................................. 14

17. Contact ............................................................................................................................................... 14

18. Disclaimer ........................................................................................................................................... 15

MLX90215

Position Programmable Linear Hall Effect Sensor

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4. Functional Diagram

VDD

Shift Register (RAM)

Program

Decoder

DAC

Hall Plate

DAC

OTPROM (ROM) 2

Chopper

5. Description

The MLX90215 is a Programmable Linear Hall Effect sensor IC fabricated utilizing silicon -CMOS technology. It

possesses active error correction circuitry which virtually eliminates the offset errors normally associated with

analog Hall Effect devices. All magnetic response functions of the MLX90215 are fully programmable for even

greater versatility. The VOQ (VOUT@ B=0), sensitivity, direction of slope and the magnitude of sensitivity drift

over temperature, are all programmable.

The ratiometric output voltage is proportional to the supply voltage. When using the supply voltage as a

reference for an A/D converter, fluctuations of ±10% in supply voltage will not affect accuracy. When

programmed for a conventional sensitivity (with a positive gain), the voltage at the output will increase as a

South magnetic field is applied to the branded face of the MLX90215. Conversely, the voltage output will

decrease in the presence of a North magnetic field. The MLX90215 has a sensitivity drift of less than +1% error,

and VOQ stability drift of less than +0.4% error, over a broad temperature range.

MLX90215

Position Programmable Linear Hall Effect Sensor

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6. Electrical specifications

DC Operating Parameters TA = -40oC to 150oC, VDD = 5.0V (Unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

Supply Voltage

VDD

Operating

4.5

5.0

5.5

Supply Current

IOUT

B = 0, VDD = 5V, IOUT = 0

2.5

4.0

6.5

Output Current (1)

VDD = 5V ± 10%

-2

Quiescent Output Voltage (2)

VOQ

10 – Bit Programmable, B = 0

0.5

4.5

Output Voltage (1)

VOH

VDD = 5V, IOUT = -2mA

4.5

4.65

Output Voltage (1)

VOL

VDD = 5V, IOUT = 2mA

0.35

0.50

Sampling Rate

fSAMP

RoughGain @ Max and Min

kHz

Bandwidth (3)

RoughGain @ Min

1.300

kHz

Bandwidth (3)

RoughGain @ Max

0.130

kHz

Step Response Time (6)

TRMIN

RoughGain @ Min

µs

Step Response Time (6)

TRMIN

RoughGain @ Max

250

µs

Offset Voltage Adjustment Resolution

ΔVOQ

B – 0, TA – 25°C, ½ VDD – 1

B = 0, TA = 25°C, ½ VDD = 0

-1.5

-6

1.5

Offset Voltage Drift over Temperature

ΔVOQ/ΔT

B = 0, TA = -40°C to 150°C

S < 100mV/mT & VOQ > 0.75V

-20

Offset Voltage Drift over Temperature (2)

ΔVOQ/ΔT

B = 0, TA = -40°C to 150°C

S > 100mV/mT & VOQ < 0.75V

-40

Range of Sensitivity (7)

13 – Bit Programmable

140

mV/mT

Peak to Peak Noise (4)

Output Resistance

ROUT

Sensitivity Drift (5)

TA = 25°C

-1

Notes:

(1) If output current and voltage specifications are exceeded, linearity will be degraded.

(2) If VOQ is programmed beyond these limits, the temperature compensation may become a problem at high temperatures. It is not

recommended to program values of VOQ below 1V or above 4V when sensitivity exceeds 100 mV/mT. Temperature instability can occur on some

devices under these conditions.

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(3) Bandwidth is related to the sample rate and ROUGHGAIN. Bandwidth is estimated by (sample rate / 30)

(4) Peak to Peak Noise is a function of ROUGHGAIN setting. See figure on Peak to Peak Noise versus Sensitivity.

(5) Sensitivity drift is independent of other parameters and does not include individual tolerances ( VOQ or VOQ/ T). The tolerance for sensitivity

±1% of its initial value. This does not include tolerance stack-up.

(6) If the step input occurs in the middle of a sample interval, the small signal response delay will double. For ROUGHGAIN values less than

or equal to 3, response time may be limited by the slew rate.

(7) 1 mT = 10 Gauss

7. How does it work?

The MLX90215 programming is done through the output pin, by changing supply voltage levels. Please note that

the VDD is raised to approximately 13V and 18V during programming. Any connected components must also

tolerate this voltage excursion. When the supply voltage is at 4.5V to 5.5V, the output behaves normally. If the

supply voltage is raised to 13V, the output then behaves as an input, or LOAD mode, allowing the 37 -bit word to

be clocked in. All data is loaded through a single line, with no dedicated clock signal. Clock and data are

integrated into one signal which is initiated with the beginning of the LOAD sequence, then clocked with the

positive edge of each bit. Variables are changed with the PC software and loaded into the temporary register of

the device (RAM) via the timings of the programmer’s microcontroller. Data can be loaded as many times as

desired while in LOAD mode. Once a word is loaded, results are checked by observing the output voltage. This

can be done with an external Voltmeter attached directly to pin 4 of the device, or with the internal ADC of th e

programmer. Once the desired program is loaded, the word can be “Zapped” permanently into ROM. This is

done when the supply voltage rises above 18V, or ZAP mode, creating enough current to “Zap” 31 zener diodes

which correspond to the temporary register. The ZAP function is a one-time function and cannot be erased. The

above description is only for reference. The voltage levels and data transfer rates are completely controlled by

the ASIC programmer. For more information on the programmer hardware, contact Melexis and request a

datasheet for the programmer.

Programming The Quiescent Offset Voltage (VOQ)10 bits, 1024 steps of resolution, are allotted to adjust the

Quiescent Offset Voltage (VOQ). By utilizing the HALFVDD function, the VOQ can be set to one of two ranges. With

the HALFVDD function disabled, the VOQ can be programmed within a range of 10% to 90% V DD with about 5mV

per step resolution. With the HALFVDD function enabled, the device may be programmed within a 2V to 3V

window with less than 1mV per step resolution.

Programming the Sensitivity (Gain)

The sensitivity is programmed with a ROUGHGAIN and a FINEGAIN adjustment. The ROUGHGAIN is adjusted by

utilizing three bits, or 8 increments. The FINEGAIN is programmed with 10 bits or 1024 increments. The

sensitivity can be programmed within a range of 5mV/mT to 140mV/mT. Another 1-bit function allows the

direction of the sensitivity to be reversed. The INVERTSLOPE function, when activated, will cause the Voltage

output of the MLX90215 to decrease in the presence of a South magnetic field, and to increase in the presence

of a North magnetic field. Table 2 expresses examples of sensitivity resulting from programming ROUGH GAIN

and FINE GAIN codes, with the INVERT SLOPE function turned off.

Note: Tables 1 and 2 are examples how various codes affect the device. Output voltage will vary slightly from

device to device. Use these tables for reference only.

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HalfVDD

OffsetDAC

Output

Units

4.97

512

2.47

1023

0.03

3.07

512

2.45

1023

1.83

Table 1 – Programming Offset Voltage (VOQ)

RougGain

FineGain

Output

Units

4.1

mV/mT

1023

9.4

mV/mT

6.2

mV/mT

1023

14.6

mV/mT

9.5

mV/mT

1023

22.4

mV/mT

14.2

mV/mT

1023

33.1

mV/mT

21.5

mV/mT

1023

50.4

mV/mT

31.3

mV/mT

1023

72.5

mV/mT

46.2

mV/mT

1023

107

mV/mT

68.9

mV/mT

1023

140

mV/mT

Table 2 – Programming Sensitivity

Temperature Compensation

Temperature compensation (TC) is defined as the change in sensitivity over temperature. Expressed in (Parts Per

Million per Degree Celcius) ppm/oC.

SensT1 = Sensitivity measured at Temperature 1 (T1)

SensT2 = Sensitivity measured at Temperature 2 (T2)

Sens25 = Initial Sensitivity measured at 25oC

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Programming the Temperature Compensation

The MLX90215 has a 5-bit (32 step) programmable adjustment that changes it’s sensitivity drift over a given

temperature range. By adjusting the TC code the sensitivity can be programmed to increase as temperature

increases to counteract the decrease in magnetic flux most magnets display over temperature.

For example a SmCo (Samarium Cobalt) magnet has a temperature coefficient of approximately -300 ppm/oC.

The MLX90215 can be programmed with a TC of 300 ppm/oC to counteract the TC of the magnet and greatly

improve linearity in the application over temperature.

TC Code

Min

Typical

Max

Units

-700

-550

-350

ppm/°C

-625

-450

-275

ppm/°C

-525

-375

-175

ppm/°C

-450

-300

-100

ppm/°C

-350

-200

-25

ppm/°C

-275

-125

ppm/°C

-200

-50

125

ppm/°C

-100

225

ppm/°C

125

275

425

ppm/°C

225

350

525

ppm/°C

300

425

600

ppm/°C

375

525

700

ppm/°C

450

600

775

ppm/°C

525

675

850

ppm/°C

600

775

950

ppm/°C

675

850

1025

ppm/°C

975

1300

1550

ppm/°C

1025

1375

1650

ppm/°C

1125

1470

1750

ppm/°C

1200

1550

1825

ppm/°C

1275

1650

1950

ppm/°C

1325

1725

2025

ppm/°C

1425

1800

2125

ppm/°C

1475

1900

2200

ppm/°C

1500

2000

2125

ppm/°C

1550

2100

2525

ppm/°C

1600

2200

2625

ppm/°C

1675

2275

2700

ppm/°C

1750

2375

2825

ppm/°C

1825

2450

2925

ppm/°C

1900

2550

3025

ppm/°C

1950

2650

3125

ppm/°C

Table 3 – Temperature Compensation

Table 3 (left) illustrates the way the TC code affects the

sensitivity temperature drift. Also note in Table 3, the

overlap in TC codes. The numbers in the table represent

typical results and are for reference only. For accurate

results the TC code must be determined experimentally.

This TC code map applies to MLX90215’s with a first line

brand showing “215DB”

Special Note

The MLX90215 programmed with a zero TC code (default)

has a typical TC value between the range of – 300 to –600

ppm/oC. This means sensitivity will decrease slightly as

temperature increases. The slightly negative initial TC value

allows the MLX90215 to be accurately programmed up to 0

TC. Almost all magnets have a naturally negative TC code.

The natural TC of a magnet added with the initial negative

TC value of the MLX90215 could degrade linearity over a

large temperature span. Using a TC code of 6, 7, or 8 will

give the MLX90215 a slightly positive TC code. Previous

revisions of the MLX90215 with second line brand of

“15AXX” or “15DXX” should refer to factory for TC code

maps.

Condition

Output Level

VOUT Shorted to VDD

VOUT = VDD

VOUT Shorted to VSS

VOUT = VSS

VOUT open with pull up load

VOUT = VDD

VOUT open with pull down

load

VOUT = VSS

VSS open with pull up load

VOUT = VDD

VSS open with pull down load

> 10 K Ohms

VOUT = VDD or 94%

VDD

VDD open with pull up load >

4.7k Ohms

VOUT = VSS or 3% VDD

VDD open with pull down

load

VOUT = VSS

MLX90215

Position Programmable Linear Hall Effect Sensor

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8. MLX90215 Performance

MLX90215

Position Programmable Linear Hall Effect Sensor

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9. Melexis Programmer

Melexis offers a programmer for programming the MLX90215. The tool comes complete with windows based software that

makes programming the MLX90215 simple. The programmer communicates with a PC via a RS232 serial interface. The

programmer and software allows users to load settings in the MLX90215, take measurements, calibrate sensors, and

program the MLX90215. For more information, please contact your sales representative.

MLX90215

Position Programmable Linear Hall Effect Sensor

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10. Absolute Maximum Ratings

Supply Voltage (Over Voltage)

18V

Supply Voltage (Operating)

5V ± 10%

Reverse Voltage Protection

-14.5V

Magnetic Flux Density

Unlimited

Supply Current, IDD

6.5 mA

Output Current (Short to VDD)

+12 mA

Output Current (Short to VSS)

-12 mA

Operating Temperature Range, TA

-40°C to 150°C

Storage Temperature Range, TS

-55°C to 165°C

ESD Sensitivity

±5kV

MLX90215

Position Programmable Linear Hall Effect Sensor

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MLX90215

VDD

1 2 3 4

C1 C2

Pin Description

Recommended Wiring

Pin1: Vdd

Pin2: Test*

Pin3: Vss

Pin4: Out

C1=2.5nF

C2=2.5nF

*Readback diagnostic use only. Pin2 is

not for programming device. For best

results tie to Vss.

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11. Clamping the Output Voltage

The MLX90215 has a 2-bit CLAMP feature which allows Four output voltage

options. The CLAMP feature is independent of the gain, and will not affect

sensitivity of the device. The table below illustrates limits for each of the four

options.

Bit Value Limits (% VDD)

0 (default) no clamp

1 5 to 45

2 10 to 90

3 5 to 95

12. Application comments

The following is a list of recommended operating parameters that will

help to ensure the accuracy and stability of the MLX90215. These are not

the absolute programming limits of the device.

1) Voq is best programmed in the absence of any magnetic

influence and to voltages closest to 1/2 VDD, where temperature

drift will be +/-0.4% or less. It is not recommended to use VOQ

values close to 0 volts or VDD when programming extremely high

sensitivity (> 100 mV/mT) values. Temperature instability may be

observed on some devices under these conditions.

2) Best linearity of sensitivity is obtained when VOQ is programmed

at 1/2VDD. This is with the 1/2VDD function enabled.

3) Best linearity of sensitivity is obtained when the gain is

programmed between 5mV/mT and 100mV/mT.

4) Best temperature stability is realized when the temperature

compensation function is programmed to zero ppm/oC.

5) The Test/Readback pin is for diagnostic use only. This pin is

normally tied to GND. Contact Melexis for more details on

programming this device.

13. Installation Comments

1) Avoid mechanical stress on leads or package. Stress may cause

VOQ shift.

A) Avoid bending leads at the package interface.

B) Support the leads by clamping, when bending.

C) Avoid gluing device to another material. This may cause

temperature-related stress.

2) CMOS products are static sensitive devices, please observe ESD precauti ons.

3) Observe temperature limits during soldering

Bit

Function

INVERTSLOPE

OFFSETDAC 5

OFFSETDAC 6

OFFSETDAC 7

OFFSETDAC 8

OFFSETDAC 9

OFFSETDAC 4

OFFSETDAC 3

OFFSETDAC 2

OFFSETDAC 1

OFFSETDAC 0

FINEGAIN 0

FINEGAIN 1

FINEGAIN 2

HALFVDD

FINEGAIN 3

FINEGAIN 4

FINEGAIN 5

FINEGAIN 8

FINEGAIN 9

FINEGAIN 6

FINEGAIN 7

ROUGHGAIN 2

ROUGHGAIN 1

ROUGHGAIN 0

TEMP CO 0

TEMP CO 1

TEMP CO 2

TEMP CO 3

TEMP CO 4

CLAMP 1

CLAMP 0

MEMLOCK

TEST 0

TEST 1

TEST 2

TEST 3

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14. Physical Characteristics

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15. Standard Information

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

according to standards in place in Semiconductor industry.

For further details about test method references and for compliance verification of selected soldering method for

product integration, Melexis recommends reviewing on our web site the General Guidelines soldering

recommendation. For all soldering technologies deviating from the one mentioned in above document (regarding peak

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

be agreed upon with Melexis.

For package technology embedding trim and form post-delivery capability, Melexis recommends to consult the

dedicated trim&form recommendation application note: lead trimming and forming recommendations

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/en/quality-environment

16. ESD Precautions

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

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

17. Contact

For the latest version of this document, go to our website at www.melexis.com.

For additional information, please contact our Direct Sales team and get help for your specific needs:

Europe, Africa

Telephone: +32 13 67 04 95

Email : sales_europe@melexis.com

Americas

Telephone: +1 603 223 2362

Email : sales_usa@melexis.com

Asia

Email : sales_asia@melexis.com

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18. Disclaimer

The information furnished by Melexis herein (“Information”) is believed to be correct and accurate. Melexis disclaims (i) any and all liability in connection with or arising out of the

furnishing, performance or use of the technical data or use of the product(s) as described herein (“Product”) (ii) any and all liability, including without limitation, special,

consequential or incidental damages, and (iii) any and all warranties, express, statutory, implied, or by description, including warranties of fitness for particular purpose, non-

infringement and merchantability. No obligation or liability shall arise or flow out of Melexis’ rendering of technical or other services.

The Information is provided "as is” and Melexis reserves the right to change the Information at any time and without notice. Therefore, before placing orders and/or prior to

designing the Product into a system, users or any third party should obtain the latest version of the relevant information to verify that the information being relied upon is current.

Users or any third party must further determine the suitability of the Product for its application, including the level of re liability required and determine whether it is fit for a

particular purpose.

The Information is proprietary and/or confidential information of Melexis and the use thereof or anything described by the In formation does not grant, explicitly or implicitly, to

any party any patent rights, licenses, or any other intellectual property rights.

This document as well as the Product(s) may be subject to export control regulations. Please be aware that export might require a prior authorization from competent authorities.

The Product(s) are intended for use in normal commercial applications. Unless otherwise agreed upon in writing, the Product(s) are not designed, authorized or warranted to be

suitable in applications requiring extended temperature range and/or unusual environmental requirements. High reliability applications, such as medical life-support or life-

sustaining equipment are specifically not recommended by Melexis.

The Product(s) may not be used for the following applications subject to export control regulations: the development, product ion, processing, operation, maintenance, storage,

recognition or proliferation of 1) chemical, biological or nuclear weapons, or for the development, production, maintenance o r storage of missiles for such weapons: 2) civil

firearms, including spare parts or ammunition for such arms; 3) defense related products, or other material for military use or for law enforcement; 4) any applications that, alone

or in combination with other goods, substances or organisms could cause serious harm to persons or goods and that can be used as a means of violence in an armed conflict or any

similar violent situation.

The Products sold by Melexis are subject to the terms and conditions as specified in the Terms of Sale, which can be found at https://www.melexis.com/en/legal/terms-and-

conditions.

This document supersedes and replaces all prior information regarding the Product(s) and/or previous versions of this documen t.

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