MLX90295EVC-FAA-100-BU

MLX90295EVC-FAA-100-BU Datasheet

MLX90295

Part	Datasheet
MLX90295EVC-FAA-100-BU	MLX90295EVC-FAA-100-BU (pdf)

Related Parts	Information
MLX90295EVC-FAA-200-BU	MLX90295EVC-FAA-200-BU
MLX90295EVC-FAA-300-BU	MLX90295EVC-FAA-300-BU

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MLX90295 Programmable Linear Hall Effect Sensor Analog Signal Processing Quad Switched Hall Plate Chopper Stabilized Amplifier Linear Analog Ratiometric Output Voltage Programmable Output Quiescent Voltage VOQ Range Programmable Magnetic Sensitivity Programmable Low Pass Filter Programmable Clamping Voltage Programmable Temperature Compensation Melexis ID Number Programmable Customer ID Number Lead-free package Application Examples Linear Position Sensing Rotary Position Sensing Current Sensing Magnetic Field Measurement Ordering Code Product Code Temperature Code MLX90295 MLX90295 MLX90295 MLX90295 Package Code VC Option Code FAA-000 FAA-100 FAA-200 FAA-300 Packing Form Code BU Legend Temperature Code Package Code Option Code Packing Form: L for Temperature Range -40°C to 150°C VC for Plastic Single in Line thickness -1.0mm See section BU for Bulk Ordering example: MLX90295LVC-FAA-000-BU Page 1 of 20 Data Sheet May/2013 MLX90295 Programmable Linear Hall Effect Sensor 1 Functional Diagram Supply Filter Shift Register Program decoder DA C DAC EEPROM Figure 1-1 Functional Diagram VDD Test VSS Ground VOUT Table 1 Pin out Pin Out VC package 1 2 3 4 2 General Description The MLX90295 is a CMOS Programmable, Ratiometric Linear Hall Effect sensor IC. The linear output voltage is proportional to the magnetic flux density. The ratiometric output voltage is proportional to the supply voltage. The MLX90295 possesses active error correction circuitry, which virtually eliminates the offset errors normally associated with analog Hall Effect devices. All the parameters of the MLX90295 transfer characteristic are fully programmable. The VOQ VOUT B = 0 Gauss , the Sensitivity, the slope polarity, the Output Clamping levels, the thermal Sensitivity drift, the internal bias point and a low-pass filter are all programmable in end-user applications. The MLX90295 has a very stable thermal compensation for both the Sensitivity and the VOQ over a broad temperature range. For traceability purpose the MLX90295 will carry a unique ID number programmed by Melexis and 24 bits of EEPROM memory are allocated for a user programmed serial number. Page 2 of 20 Data Sheet May/2013 MLX90295 Programmable Linear Hall Effect Sensor Table of Contents 1 Functional Diagram 2 General Description 2 3 Glossary of 4 Maximum Ratings 4 5 Detailed Block 5 Detailed Description 5 6 General Electrical 6 7 Programming Range 7 8 Timing Specifications 7 9 Accuracy 7 10 Programmable Features 8 Output Quiescent Voltage 9 Thermal VOQ Drift 9 Sensitivity, Rough Gain and Fine Gain 9 Sensitivity Range 10 Sensitivity Polarity 12 Clamping Levels CLAMPLOW, 12 Filter 13 Sensitivity Temperature Compensation TC, TCW, TC2 13 Diagnostic Output Level 14 The EEPROM, Parity, and Melexis CRC 14 Output Amplifier Configuration MODE 14 Memory Lock MEMLOCK 15 IC traceability 15 11 Performance 15 12 Applications 16 Application Circuits VC-package 16 Programming the Sensor 16 Calibration Procedure 17 13 Standard information regarding manufacturability of Melexis products with different soldering processes 18 14 ESD 18 15 Package Information 19 VC Package Outline and Hall Plate Position 19 16 Disclaimer 20 Page 3 of 20 Data Sheet May/2013 MLX90295 Programmable Linear Hall Effect Sensor 3 Glossary of Terms Term mT milli-Tesla VOQ Output Quiescent Voltage Sensitivity TempCo Sensitivity Temperature Compensation PTC Programming Through the Connector MSB LSB Explanation Unit of measurement for magnetic flux density. 1mT is equal to 10 Gauss. Output voltage at zero magnetic field, VOUT for B = 0 mT. Change in output voltage versus change in magnetic field VOUT / B Change in Sensitivity over temperature. Listed in units of ppm / °C where 100ppm / °C. = / °C Melexis in-circuit programming protocol. Most Significant Bit. Least Significant Bit. 4 Maximum Ratings Units 30 V Each unit is characterized over temperature during final test to optimize its performance and accuracy. To achieve the best possible Sensitivity Temperature Compensation, TempCo, each unit is optimized for use within a specific Sensitivity range. This is represented in the ordering information by the option code. There are four available ranges, option codes 0, 1, 2 and The option code corresponds with the two MSB of the RG parameter. Each device is tested to meet the TempCo specification in the Sensitivity range determined by the RG parameter RG = RG = RG = or RG = regardless of the FG parameter. Option Code xxx-000 xxx-100 xxx-200 xxx-300 Rough Gain Sensitivity Range Typical Magnetic Field Range mV/mT mT, BMAX - BMIN 0-3 00 xx < S < 15 333 < B < 800 4-7 01 xx 10 < S < 35 156 < B < 333 8-11 10 xx 18 < S < 90 62 < B < 156 12-15 11 xx 50 < S < 210 6 < B < 62 Table 9 Optimized Sensitivity Range The next figures show the typical Sensitivity versus the FG and RG parameters. The gray areas are representative of the chip to chip dispersion i.e. for the same RG and FG parameters, the Sensitivity can vary from chip to chip . There is a large overlap between the different ranges for use of one range for applications with large magnetic and/or mechanical dispersions. The Sensitivity graphs and tables can be used to select the right device type for the application. If one is unsure of the applications magnetic design and the desired Sensitivity range Melexis recommends option code Page 10 of 20 Data Sheet May/2013 MLX90295 Programmable Linear Hall Effect Sensor Figures Sensitivity versus RG and FG. Important You need option code 000 for Sensitivity Range 0 is option code 000, option code 1 for Sensitivity Range 1, option code 2 for Sensitivity Range 2 and option code 3 for Sensitivity Range Page 11 of 20 Data Sheet May/2013 MLX90295 Programmable Linear Hall Effect Sensor Sensitivity Polarity INVERT The slope transfer characteristic defines the Sensitivity. The INVERT parameter changes the Sensitivity's polarity, or the slope's direction. This allows the device to accommodate the application requirements and the magnet's polarity. The slope is inverted in the first stage of the IC, at the Hall plate. With INVERT set to 0, the output voltage increases as a South magnetic field is applied and decreases in the presence of a North magnetic field. An INVERT value of 1 causes the output voltage to increase in the presence of a North magnetic field and decrease in the presence of a South magnetic field. The magnetic field polarity is referenced to the field component perpendicular to the top-face of the MLX90295. Clamping Levels CLAMPLOW, CLAMPHIGH Two independent values, called the clamping levels, can limit the output voltage range or swing. The CLAMPLOW parameter adjusts the minimum output voltage level, ClampLo. The CLAMPHIGH sets the maximum output voltage level, ClampHi. Both parameters have 10 bits of adjustment with a resolution of approximately 0.005V. The formulas below give a close approximation of the output clamp voltage. The actual clamping level formulas vary slightly from chip to chip. If CLAMPLOW exceeds CLAMPHIGH the output voltage is fixed at the high clamp voltage level. The CLAMPHIGH and CLAMPLOW have an initial value of 512, set by Melexis. This results in a fixed output voltage of approximately 50% VDD. 5.10V ClampLo = ∗ CLAMPLOW 1023 VDD =5.00V 5.10V ClampHi =

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MLX90295

Programmable Linear Hall Effect Sensor

Analog Signal Processing Quad Switched Hall Plate Chopper Stabilized Amplifier Linear Analog Ratiometric Output Voltage Programmable Output Quiescent Voltage VOQ Range Programmable Magnetic Sensitivity Programmable Low Pass Filter Programmable Clamping Voltage Programmable Temperature Compensation Melexis ID Number Programmable Customer ID Number Lead-free package

Application Examples

Linear Position Sensing Rotary Position Sensing Current Sensing Magnetic Field Measurement
Ordering Code

Product Code Temperature Code

MLX90295

MLX90295

MLX90295

MLX90295

Package Code VC

Option Code FAA-000 FAA-100 FAA-200 FAA-300

Packing Form Code BU

Legend Temperature Code Package Code Option Code Packing Form:

L for Temperature Range -40°C to 150°C VC for Plastic Single in Line thickness -1.0mm See section BU for Bulk
Ordering example:

MLX90295LVC-FAA-000-BU

Page 1 of 20

Data Sheet May/2013

MLX90295

Programmable Linear Hall Effect Sensor
1 Functional Diagram

Supply

Filter

Shift Register

Program decoder

DA C DAC

EEPROM

Figure 1-1 Functional Diagram

VDD Test VSS Ground VOUT

Table 1 Pin out

Pin Out VC package
1 2 3 4
2 General Description

The MLX90295 is a CMOS Programmable, Ratiometric Linear Hall Effect sensor IC. The linear output voltage is proportional to the magnetic flux density. The ratiometric output voltage is proportional to the supply voltage. The MLX90295 possesses active error correction circuitry, which virtually eliminates the offset errors normally associated with analog Hall Effect devices. All the parameters of the MLX90295 transfer characteristic are fully programmable. The VOQ VOUT B = 0 Gauss , the Sensitivity, the slope polarity, the Output Clamping levels, the thermal Sensitivity drift, the internal bias point and a low-pass filter are all programmable in end-user applications. The MLX90295 has a very stable thermal compensation for both the Sensitivity and the VOQ over a broad temperature range. For traceability purpose the MLX90295 will carry a unique ID number programmed by Melexis and 24 bits of EEPROM memory are allocated for a user programmed serial number.

Page 2 of 20

Data Sheet May/2013

MLX90295

Programmable Linear Hall Effect Sensor

Table of Contents
1 Functional Diagram 2 General Description 2 3 Glossary of 4 Maximum Ratings 4 5 Detailed Block 5

Detailed Description 5 6 General Electrical 6 7 Programming Range 7 8 Timing Specifications 7 9 Accuracy 7 10 Programmable Features 8

Output Quiescent Voltage 9 Thermal VOQ Drift 9 Sensitivity, Rough Gain and Fine Gain 9 Sensitivity Range 10 Sensitivity Polarity 12 Clamping Levels CLAMPLOW, 12 Filter 13 Sensitivity Temperature Compensation TC, TCW, TC2 13 Diagnostic Output Level 14 The EEPROM, Parity, and Melexis CRC 14 Output Amplifier Configuration MODE 14 Memory Lock MEMLOCK 15 IC traceability 15 11 Performance 15 12 Applications 16 Application Circuits VC-package 16 Programming the Sensor 16 Calibration Procedure 17 13 Standard information regarding manufacturability of Melexis products with different soldering processes 18 14 ESD 18 15 Package Information 19 VC Package Outline and Hall Plate Position 19 16 Disclaimer 20

Page 3 of 20

Data Sheet May/2013

MLX90295

Programmable Linear Hall Effect Sensor
3 Glossary of Terms

Term mT milli-Tesla VOQ Output Quiescent Voltage Sensitivity TempCo Sensitivity Temperature Compensation PTC Programming Through the Connector MSB LSB

Explanation Unit of measurement for magnetic flux density. 1mT is equal to 10 Gauss.

Output voltage at zero magnetic field, VOUT for B = 0 mT.

Change in output voltage versus change in magnetic field VOUT / B Change in Sensitivity over temperature. Listed in units of ppm / °C where 100ppm / °C. = / °C

Melexis in-circuit programming protocol.

Most Significant Bit. Least Significant Bit.
4 Maximum Ratings

Units 30 V
Each unit is characterized over temperature during final test to optimize its performance and accuracy. To achieve the best possible Sensitivity Temperature Compensation, TempCo, each unit is optimized for use within a specific Sensitivity range. This is represented in the ordering information by the option code. There are four available ranges, option codes 0, 1, 2 and The option code corresponds with the two MSB of the RG parameter. Each device is tested to meet the TempCo specification in the Sensitivity range determined by the RG parameter RG = RG = RG = or RG = regardless of the FG parameter.

Option Code
xxx-000 xxx-100 xxx-200 xxx-300

Rough Gain Sensitivity Range Typical Magnetic Field Range
mV/mT
mT, BMAX - BMIN
0-3 00 xx
< S < 15
333 < B < 800
4-7 01 xx
10 < S < 35
156 < B < 333
8-11 10 xx
18 < S < 90
62 < B < 156
12-15 11 xx
50 < S < 210
6 < B < 62

Table 9 Optimized Sensitivity Range

The next figures show the typical Sensitivity versus the FG and RG parameters. The gray areas are representative of the chip to chip dispersion i.e. for the same RG and FG parameters, the Sensitivity can vary from chip to chip . There is a large overlap between the different ranges for use of one range for applications with large magnetic and/or mechanical dispersions. The Sensitivity graphs and tables can be used to select the right device type for the application. If one is unsure of the applications magnetic design and the desired Sensitivity range Melexis recommends option code

Page 10 of 20

Data Sheet May/2013

MLX90295

Programmable Linear Hall Effect Sensor

Figures Sensitivity versus RG and FG. Important You need option code 000 for Sensitivity Range 0 is option code 000, option code 1 for Sensitivity Range 1, option code 2 for Sensitivity Range 2 and
option code 3 for Sensitivity Range

Page 11 of 20

Data Sheet May/2013

MLX90295

Programmable Linear Hall Effect Sensor

Sensitivity Polarity INVERT

The slope transfer characteristic defines the Sensitivity. The INVERT parameter changes the Sensitivity's polarity, or the slope's direction. This allows the device to accommodate the application requirements and the magnet's polarity. The slope is inverted in the first stage of the IC, at the Hall plate. With INVERT set to 0, the output voltage increases as a South magnetic field is applied and decreases in the presence of a North magnetic field. An INVERT value of 1 causes the output voltage to increase in the presence of a North magnetic field and decrease in the presence of a South magnetic field. The magnetic field polarity is referenced to the field component perpendicular to the top-face of the MLX90295.

Clamping Levels CLAMPLOW, CLAMPHIGH

Two independent values, called the clamping levels, can limit the output voltage range or swing. The CLAMPLOW parameter adjusts the minimum output voltage level, ClampLo. The CLAMPHIGH sets the maximum output voltage level, ClampHi. Both parameters have 10 bits of adjustment with a resolution of approximately 0.005V. The formulas below give a close approximation of the output clamp voltage. The actual clamping level formulas vary slightly from chip to chip. If CLAMPLOW exceeds CLAMPHIGH the output voltage is fixed at the high clamp voltage level. The CLAMPHIGH and CLAMPLOW have an initial value of 512, set by Melexis. This results in a fixed output voltage of approximately 50% VDD.
5.10V

ClampLo =
∗ CLAMPLOW
1023

VDD =5.00V
5.10V

ClampHi =

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Datasheet ID: MLX90295EVC-FAA-100-BU 647799