MLX90251EGO-2 MELEXIS [Melexis Microelectronic Systems], MLX90251EGO-2 Datasheet

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MLX90251EGO-2

Manufacturer Part Number
MLX90251EGO-2
Description
Programmable Linear Hall Effect Sensor
Manufacturer
MELEXIS [Melexis Microelectronic Systems]
Datasheet
Table 1: Pin out
Features and Benefits
Ordering Information
Part No.
MLX90251
MLX90251
Example:
MLX90251LVA-2
MLX90251EGO-2
††
Figure 1-1 Functional Diagram
V
Test
V
V
NC
3901090251
Rev 009
Both package types (VA and GO) are lead-free (see section 15).
DD
SS
OUT
1 Functional Diagram
Please see section 10.4 for detailed information on the option code.
Analog Signal Processing
Quad Switched Hall Plate
Chopper Stabilized Amplifier
Linear Analog Ratiometric Output Voltage
Programmable Output Quiescent Voltage (V
Programmable Magnetic Sensitivity
Programmable Low Pass Filter
Programmable Clamping Voltage
Programmable Temperature Compensation
Melexis ID Number
Programmable Customer ID Number
Lead-free package
(Ground)
-100%V
3
Supply
DD
E E P R O M
Shift Register
OPA
…200%V
VA
1
OPA
1
2
3
4
DD
Temperature Code
E (-40° C to 85° C)
L (-40° C to 150°C)
E (-40° C to 85° C)
Range
Pin Out
Filter
1, 4, 7, 8-14
GO
OPA
2
3
5
6
Program
decoder
4
2
Page 1 of 22
OQ
Programmable Linear Hall Effect Sensor
)
Package
VA (4 Lead SIP)
GO (TSSOP14)
Application Examples
The MLX90251 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
MLX90251 possesses active error correction
circuitry, which virtually eliminates the offset errors
normally associated with analog Hall Effect
devices. All the parameters of the MLX90251
transfer characteristic are fully programmable.
The V
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 MLX90251 has a very stable
thermal compensation for both the Sensitivity and
the V
traceability purpose the MLX90251 will carry a
unique ID number programmed by Melexis and 24
bits of EEPROM memory are allocated for a user
programmed serial number.
2 General Description
Linear Position Sensing
Rotary Position Sensing
Current Sensing
Magnetic Field Measurement
OQ
OQ
Code
(V
over a broad temperature range. For
OUT
@ B = 0 Gauss), the Sensitivity,
MLX90251
Option Code
0, 1, 2, 3
0, 1, 2, 3
Data Sheet
Nov/06
††

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MLX90251EGO-2 Summary of contents

Page 1

... MLX90251 E (-40° 85° (-40° 150°C) MLX90251 E (-40° 85° C) Example: MLX90251LVA-2 MLX90251EGO-2 † Both package types (VA and GO) are lead-free (see section 15). †† Please see section 10.4 for detailed information on the option code. 1 Functional Diagram Supply ...

Page 2

Table of Contents 1 Functional Diagram ........................................................................................................... 1 2 General Description .......................................................................................................... 1 3 Glossary of Terms............................................................................................................. 3 4 Maximum Ratings ............................................................................................................. 3 5 Detailed Block Diagram..................................................................................................... 4 5.1 Detailed Description .................................................................................................... 4 6 General Electrical Specifications....................................................................................... 5 7 Programming ...

Page 3

Glossary of Terms mT (milli-Tesla) = Unit of measurement for magnetic flux density. 1mT is equal to 10 Gauss. V (Output Quiescent Voltage) = Output voltage at zero magnetic field Sensitivity = Change in output voltage versus ...

Page 4

Detailed Block Diagram Figure 5-1 Detailed Block Diagram 5.1 Detailed Description Integrated on the MLX90251 is a temperature-compensated quad switched Hall plate, chopper stabilized amplifiers, adjustable output filter, output driver, voltage protection circuitry and a programmable EEPROM with security ...

Page 5

General Electrical Specifications DC operating parameters (unless otherwise specified) and for T DD range (E or L). Parameter Symbol Table 3: Electrical Specifications † The ratiometric output voltage is proportional to the supply voltage. When ...

Page 6

Programming Range T programming 20°C to 30° Parameter Symbol Table 4: Programming Range Specifications 8 Timing Specifications DC operating parameters (unless otherwise specified) and for T DD range (E or L). Parameter Symbol ...

Page 7

Valid for Rough Gain within the specified option code. †† Life Time Drift (based on HTOL data [1000 hours @ 150° C]). ∆ Thermal Drift. ∆ For other test conditions, please contact the Melexis Sales ...

Page 8

Output Quiescent Voltage (V Two parameters, AGND and OFFSET, are used for adjustment of the V for coarse adjustment has a resolution of approximately 0.014V and a range of -100%V OQ 200%V . The OFFSET ...

Page 9

The MLX90251 also has an additional stage, Fine Gain, for fine tuning the Sensitivity. The stage (parameter FG) follows the RG and provides a 10 bit adjustment. The small signal gain of the FG is within 1.0 and 2.5. The ...

Page 10

Figures 10.4-1…10.4-4 Sensitivity versus RG and FG 3901090251 Rev 009 Programmable Linear Hall Effect Sensor Page MLX90251 Data Sheet Nov/06 ...

Page 11

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 ...

Page 12

Filter (FILTER) The MLX90251 includes two programmable low-pass filters located within the chopper amplifier stages. The two low-pass filters are controlled through a 4 bit parameter, FILTER. The FILTER value 0 corresponds to minimum filtering, maximum speed (impulse response ...

Page 13

TempCo Range (ppm / ° C) Accuracy (ppm / ° 500 ± 100 500 to 1200 ± 150 1200 to 2000 ± 200 Table 12: TempCo Accuracy Note: The budget error of the whole system, the compensation ...

Page 14

Memory Lock (MEMLOCK) The Memory Lock feature prevents the device from entering programming mode and from any changes to the EEPROM. The entire EEPROM is locked by setting the MEMLOCK parameter to 1. This should be the last parameter ...

Page 15

Applications Information 12.1 Application Circuits – VA-package Pin 2, TEST, is not used in applications. For EMC protection it is recommended to connect pin 2 to pin 3, Ground, as close as possible to the device pins. The values ...

Page 16

Programming the Sensor To program the MLX90251 connection to V mode by increasing the supply voltage to the V device through the output pin using the Melexis tri-level PTC protocol. The clock and data are integrated into one serial ...

Page 17

Calibration Procedure The programmable features of the device allow for calibration within the application. This section gives general information for a two point calibration procedure. The two point calibration is the most common however possible to adapt ...

Page 18

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 ...

Page 19

Package Information VA-package: the lead-free VA-package is released for MSL1/245°C. TSSOP14-package (GO-package): the lead-free TSSOP14-package is released for MSL3/260° C. 15.1 VA Package Outline and Hall Plate Position 3901090251 Rev 009 Programmable Linear Hall Effect Sensor Page 19 of ...

Page 20

GO Package Outline 0.65 TYP 1.0 DIA 1.0 1.0 4.90 5.10* 0.19 0.30*** 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). ...

Page 21

GO Pin Out and Marking 15.4 GO Hall Plate Positioning 3901090251 Rev 009 Programmable Linear Hall Effect Sensor Page MLX90251 Data Sheet Nov/06 ...

Page 22

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 description regarding the information set forth herein or regarding the ...

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