ETC MLX90224B

■
■
■
■
■
■
Chopper Stabilized Amplifier Stage
CMOS for Optimum Stability, Quality and Cost
Dual Output
4.5V to 28V Operation
Phase/Direction Detection (B)
Pulse Doubling Output (C)
■
■
■
■
Direction Detector
Speed Sensor
Shaft Encoding
Position Sensing
Part No.
MLX90224 A
MLX90224 B
MLX90224 C
Temperature Suffix
L
L
L
Package
VA
VA
VA
1
Voltage
Regulator
V DD
Replaced with Logic for
MLX90224 B
2
Chopper
OUTPUT
1
4
Chopper
OUTPUT
2
3
Temperature Range
-40oC to 150oC Automotive
-40oC to 150oC Automotive
-40oC to 150oC Automotive
The MLX90224 series are dual Hall effect latches. It
includes two Hall effect latch functions of which typical thresholds are +/- 2.0 mT. In each latch, the magnetic flux detection is performed by a switched silicon
Hall plate. The BOP and BRP are temperature-compensated and give a sensitivity temperature coefficient of
500 ppm/oC to compensate popular magnets.
The MLX90224 A, C output transistor will be “latched
on” (BOP) in the presence of a sufficiently strong South
pole magnetic field facing the marked side of the package. Similarly, the output will be “latched off” (BRP) in
the presence of a North field. Spacing on the plates is
1.85mm.
The MLX90224 B series are designed for direction
detection with a high speed chopper which provides
15µs delay.
GND
Note: Static sensitive device, please observe ESD precautions.
MLX90224 Dual Hall Effect Latch
Rev 1.2
8/May/99
Page 1
!
"
DC Operating Parameters TA = -40oC to 150oC, VDD = 4.5V to 28V (Unless otherwise specified)
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DC Operating Parameters TA = -40oC to 150oC, VDD = 4.5V to 28V (Unless otherwise specified)
0
,
" 0
*"""
2
3
3
1
2
1
/
/
/
/
/
/
&
&
&
&
&
&
'( ) '( '( ) '( '( ) '( #$1mT=10Gauss
Melexis Inc. reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Melexis does not
assume any liability arising from the use of any product or application of any product or circuit described herein.
MLX90224 Dual Hall Effect Latch
Rev 1.2
8/May/99
Page 2
%
&
Typical Magnetic Switch Points
versus
Supply Voltage
Typical Magnetic Switch Points
versus
Supply Voltage
90224 A, B
5
90224 C
50
3
30
Flux Density (mT)
Flux Density (mT)
B OP
1
0
-1
B RP
-3
B OP
10
0
-10
B RP
-30
-5
-50
0
5
10
15
20
25
30
0
5
Supply Voltage (V)
90224
20
25
30
90224
500
8
400
T A = -40 oC
VDS(ON) (mV)
Supply Current (mA)
15
Typical Saturation Voltage
versus
Temperature
V DD = 12 V, I OUT = 20mA
Typical Supply Current
versus
Supply Voltage
10
10
Supply Voltage (V)
6
T A = 25 oC
T A = 125 oC
4
2
300
V DS(ON)
200
100
0
0
0
5
10
15
20
25
30
-40
40
80
120
160
200
o
Supply Voltage (V)
MLX90224 Dual Hall Effect Latch
0
Temperature ( C)
Rev 1.2
8/May/99
Page 3
%
&
Typical Magnetic Switch Points
versus
Temperature
Typical Magnetic Switch Points
versus
Temperature
90224 A, B
5
90224 C
50
3
30
Flux Density (mT)
Flux Density (mT)
B OP
1
0
-1
B OP
10
0
-10
B RP
B RP
-3
-30
-5
-50
-40
0
40
80
120
160
200
-40
0
Temperature ( o C)
Output Voltage
versus
Flux Density
80
120
160
200
Output Voltage
versus
Flux Density
90224 A, B
25
90224 C
25
VDD
VDD
20
Output Voltage (V)
20
Output Voltage (V)
40
Temperature ( o C)
15
B RP
BOP
10
5
15
B RP
BOP
10
5
V sat
V sat
0
-6
0
-4
-2
0
2
4
6
-60
Flux Density (mT)
MLX90224 Dual Hall Effect Latch
-40
-20
0
20
40
60
Flux Density (mT)
Rev 1.2
8/May/99
Page 4
%
&
Min/Max Magnetic Switch
Range
versus
Temperature
Min/Max Magnetic Switch
Range
versus
Temperature
90224 A, B Only
5
90224 C
50
3
B OP M a x
30
1
Flux Density (mT)
Flux Density (mT)
B OP M a x
B OP M i n
0
B RP M i n
-1
B OP M i n
10
0
-10
B RP M i n
B RP M a x
-3
-30
B RP M a x
-5
-50
-40
0
40
80
120
160
200
-40
0
Temperature ( o C)
Power Dissipation
versus
Temperature
120
160
200
All Devices
280
400
260
Solder Temperature (oC)
Package Power Dissipation (mW)
80
Wave Soldering
Parameters
All Devices
500
40
Temperature ( o C)
300
200
100
240
220
200
VA Package
R θJA =175 oC / W
0
-40
0
40
80
120
160
200
0
Temperature ( o C)
MLX90224 Dual Hall Effect Latch
5
10
15
20
25
30
Time in Wave Solder (Seconds)
Rev 1.2
8/May/99
Page 5
&
+,
The MLX 90224 Speed and Direction Sensor is designed for use with Multipole ring magnet targets having evenly distributed North and South magnetic poles
on the circumference of the magnet. An example of the
basic physical arrangement of the sensor and magnet
is shown in Fig. 1. The MLX90224 is available in 3
versions. The first version will provide the user with
two digital output signals. Output S1 will provide a
speed pulse from the changing magnetic flux at sensing
element S1. Output S2 will provide a phase shifted
output identical in pulse width and period to S1. This
version is referred to as MLX90224 A. The
MLX90224 B version will provide an output signal
that decodes the phase shifted signals to directly provide an output for the speed which is twice the natural
frequency of the alternating magnetic field from the
pole spacing of the multipole ring magnet. The other
output pin will represent the direction and will change
from logic high to logic low when the direction of rotation of the magnet is reversed. This then allows to directly see the condition of the speed with twice the
resolution of the MLX90224 A and to also know directly the direction of rotation of the target. The third
version of this product the MLX90224 C will be identical in function of the A but with less sensitive magnetic switch points. The MLX90224 A has Latching
magnetic Bop and Brp values of typically +/- 2mT as
does the internal circuitry of the B. The C version has
also Latching magnetic trip points but with the thresholds set to +/- 25mT.
N
N
S
S
N
Fig. 1
'(
The MLX90224LVA can replace the following Hall
effect devices: Allegro A3421KA /A3422KA
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Multipole Ring Magnet and MLX90224BA or BC
Sensor S1
Sensor S2
Digital Output S1
Flux Density
Digital Output S2
0
50
100
150
200
250
300
350
Degrees of Rotation
MLX90224 Dual Hall Effect Latch
Rev 1.2
8/May/99
Page 6
#
Severe Environment and
Automotive Protection Circuit
Microcontroller Application
Schematic
with EMC Protection
V DD
R1
MLX
90224
R1
R1
MLX
90224
R2
Controller
R L =3.3 kΩ
R 1 =100Ω
C 1 = 10nf
C 2 = 2.2nf
C2
R1
R2
C1
C2
C1
C2
Output
C1
RL
C2
Output
C2
RL
= 5.6kΩ
= 3 3 2Ω
= 10nF
= 2.2nF
Direction-Detection Circuit
N
S
N
S
S
N
+B
N
S
B OP1
0
S
N
S
S
N
+B
N
S
S
N
S
N
-B
B RP2
Latch Output 1
MLX90224 B
Clock
Input
B OP2
0
S
N
B R P1
-B
N
CHANGE IN DIRECTION
S
N
Timing Diagram
D Input
Latch Output 2
Positive Edge
Triggered D Flip Flop
DIRECTION
Direction Output
DC Level
SPEED
MLX90224 Dual Hall Effect Latch
Rev 1.2
8/May/99
Page 7
%,
'
5.33
5.43
VA Package Dimensions
5.08
5.24
VA Hall Plate / Chip Location
3.615
2.69
1.765
45 o
1.22
1.32
Hall Plates
0.25 x 0.25
3.76
3.86
4.50
4.10
2.700
1.700
A
45 o X 1mm
Bevel
2.180
C
5o
(2x)
9836 *
24A88
5o
(2x)
Marked
Surface
3.46 3.79
3.30 3.63
0.387
0.289
D
0.40
0.60
0.35
0.25
0.387
0.289
B
All Dimensions in millimeters
0.10
0.00
1.0
MAX
1
2
3
E
0.22
REF
4
15.50
14.50
0.45
0.35
A
1.20
1.10
B
0.66
0.61
C
0.29
0.24
D
45 o
E
0.31
0.18
18.5
17.5
* MARKING:
Line 1:
1 st and 2nd digits (98)
3rd and 4th digits (36)
= Year (1998 )
= Week of Year
Line 2:
1st and 2nd digits (15)
3rd digit (A)
4th and 5th digits(88)
= Chip I.D. (9022 4 )
= Chip Revision
= Lot Number
Tape Line
PINOUT:
P in 1
Pin 2
Pin 3
Pin 4
5.60
6.50
18.5
17.5
0.40
0.25
6.39
6.31
13.00
12.40
4.30
3.70
V DD
Output 1
GND
Output 2
NOTES:
1.) Controlling dimension: mm
2.) Leads must be free of flash and
plating voids
3.) Leads must not arc toward
the rear of package
4.) Lead frame material:
EFTEC 64T
5.) Molding compound:
Sumitomo EME 6300H
6.) Package dimensions exclude
molding flash
7.) Tolerance is 0.254mm unless
otherwise specified
24.3
23.3
9.76
8.95
1.00
0.00
38.00
MAX
VA Tape Dimensions
0.60
0.40
For more information, please contact:
Melexis, Inc.
41 Locke Road
Concord, NH 03301
Phone: (603) 223-2362
E-mail: [email protected]
Web: www.melexis.com
MLX90224 Dual Hall Effect Latch
Fax: (603) 223-9614
Rev 1.2
8/May/99
Page 8