MELEXIS MLX90217

MLX90217
Hall-Effect Cam Sensor
Features and Benefits
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Rotary Position Gear Tooth Sensor
Short Circuit Protection
On-chip 10 bit A/D Converter
Self-Adjusting Magnetic Range
High Speed Operation
No Chopper Delay
Zero Speed Detection
No Rotary Orientation Concerns
Applications
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Camshaft Sensor
Geartooth Sensor
Linear Encoder
Rotary Encoder
Direction Detection*
*See applications example
Ordering Information
Part No.
MLX90217
Temperature Suffix
L (-40oC to 150oC)
Functional Diagram
Description
Hall
Plate
10-Bit
ADC
4-Bit
ADC
Amplifier
Voltage
Regulator
Protected
Output
2
3
Pin 1 - VDD (Supply)
Pin 2 - VSS (Ground)
Pin 3 - Output
Note: Static
precautions.
3901090217
Rev. 009
sensitive
device,
please
observe
The MLX90217 is a self adjusting digital output
rotary position gear tooth sensor designed for use
in automotive camshaft sensing as well as other
speed sensing applications. It is designed to be
used with a bias magnet south facing the back
(non-marked) side of the IC. The device has an
open collector output which is short circuit
protected.
The MLX90217 is a sophisticated IC featuring an
on-chip 10-bit A/D Converter and logic that acts
as a digital sample and hold circuit. A separate 4bit A/D converter provides a fixed hysteresis. The
90217 does not have a chopper delay. The 90217
uses a single Hall plate which is immune to rotary
alignment problems. The bias magnet can be
from 50 to 400mT.
Logic
1
Package Code
UA (TO-92 flat)
ESD
As the signal is sampled, the logic recognizes an
increasing or decreasing flux density. The output
will turn on (BOP) after the flux has reached its
peak and decreased by an amount equal to the
hysteresis. Similarly the output will turn off (BOP)
after the flux has reached its minimum value and
increased by an amount equal to the hysteresis.
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MLX90217
Hall-Effect Cam Sensor
MLX90217 Electrical Specifications
DC Operating Parameters TA = -40oC to 150oC, VDD = 3.5V to 24V (unless otherwise specified).
Parameter
Symbol Test Conditions
Min
Typ
Max
Units
Supply Voltage
VDD
Operating
3.5
-
24
V
Supply Current
IDD
VDD = 12V
1.5
3.0
4.5
mA
Supply Current
IDD
VDD = 3.5V to 24V
1
-
6
mA
Leakage Current
ILEAK
VOUT = 3.5V to 24V
-
-
10
µA
Output Current
IOUT
Operating
-
-
25
mA
Output Saturation Voltage
VSAT
VDD = 12V, IOUT = 25mA
-
-
600
mV
Output Short Circuit Current
IFAULT
Fault
50
100
150
mA
Output Short Circuit Shutdown
TFAULT
Fault
100
-
200
µS
Clock Frequency
fCLK
Operating
300
500
800
kHz
Output Rise Time
tr
VDD=12V R1 = 880W C1 = 20pf
-
400
nS
Output Fall Time
tf
VDD=12V R1 = 880W C1 = 20pf
-
400
nS
Bandwidth
BW
Operating
-
-
15
kHz
Thermal Resistance
RTH
Operating
-
-
200
oC/Watt
MLX90217 Magnetic Specifications
DC Operating Parameters TA = -40oC to 150oC, VDD = 3.5V to 24V (Unless otherwise specified)
Parameter
Symbol Test Conditions
Min
Typ
Max
Units
Back Bias Range
BBIAS
Operating
-30
-
400
mT
VDD = 12V
50
-
500
mT
VDD = 3.5V to 24V
1.8
3.5
10
mT
Linear Region
Hysteresis
Bhys
Notes: 1mT=10Gauss
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3901090217
Rev. 009
MLX90217
Hall-Effect Cam Sensor
Performance Graphs
Absolute Maximum Ratings
Supply Voltage (Operating), VDD
Supply Current (Fault), IDD
50mA
Output Current (Fault), IOUT
30mA
Output Current (Fault), Ifault
50mA
Output Voltage, VOUT
30V
Power Dissipation, PD
100mW
Operating Temperature Range, TA
- 40°C to 150°C
Storage Temperature Range, TS
- 65°C to 150°C
Maximun Junction Temp, TJ
3901090217
Rev. 009
30V
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MLX90217
Hall-Effect Cam Sensor
Application Notes
Maximum dynamic range is 500 mT. The
hysteresis is fixed at 5.0 mT. Best angular
accuracy will be obtained when the magnetic
circuit provides peak magnetic flux at the chip
near the high end of the linear range of 500 mT.
EMC protection using external components are
recommended. Two possibilities are shown on
the following page. Normally the South pole faces
the unbranded side of the device. A North pole
will enable a test sequence used in factory
testing.
Unique Features
The output is reset to the high state at power on
(output driver is off) whatever the field is. The
output only changes after the first min is detected.
The reset state holds no information about the
field. If the supply of the chip is raised slowly, the
reset state is not stable. This has been observed
at 0 field but it should be the same with small and
large fields.
Gear tooth sensors often need to be adjusted
after the module is assembled to align the
magnet with differential Hall plates or orient with
teeth. However the MLX90217 is “self adjusting”
over a wide range of back bias flux eliminating
the need for any trimming in the application. The
magnet may be glued to the back surface (non
branded side) of the IC using a cyanoacrylate
adhesive or suitable epoxy.
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MLX90217
Hall-Effect Cam Sensor
Applications Examples
3901090217
Rev. 009
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MLX90217
Hall-Effect Cam Sensor
Physical Characteristics
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Hall-Effect Cam Sensor
Reliability Information
This Melexis device is classified and qualified regarding soldering technology, solderability and
moisture sensitivity level, as defined in this specification, according to following test methods:
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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)
CECC00802
Standard Method For The Specification of Surface Mounting Components (SMDs) of
Assessed Quality
EIA/JEDEC JESD22-B106
Resistance to soldering temperature for through-hole mounted devices
EN60749-15
Resistance to soldering temperature for through-hole mounted devices
MIL 883 Method 2003 / EIA/JEDEC JESD22-B102
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.
Based on Melexis commitment to environmental responsibility, European legislation
(Directive on the Restriction of the Use of Certain Hazardous substances, RoHS) and customer
requests, Melexis has installed a Roadmap to qualify their package families for lead free processes also.
Various lead free generic qualifications are running, current results on request.
For more information on manufacturability/solderability see quality page at our website:
http://www.melexis.com/html/pdf/MLXleadfree-statement.pdf
ESD Procautions
Electronic semiconductor products are sensitive to Electro Static Discharge (ESD).
Always observe Electro Static Discharge control procedures whenever handling semiconductor
products.
3901090217
Rev. 009
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MLX90217
Hall-Effect Cam Sensor
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.
© 2002 Melexis NV. All rights reserved.
For the latest version of this document, go to our website at:
www.melexis.com
Or for additional information contact Melexis Direct:
Europe and Japan:
All other locations:
Phone: +32 13 67 04 95
E-mail: [email protected]
Phone: +1 603 223 2362
E-mail: [email protected]
ISO/TS16949 and ISO14001 Certified
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