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부품번호 MLX90215 기능
기능 Precision Programmable Linear Hall Effect Sensor
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MLX90215 데이터시트, 핀배열, 회로
www.DataSheet4U.com
Features and Benefits
MLX90215
Precision Programmable*
Linear Hall Effect Sensor
*Patent Pending
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
Applications
Linear Position Sensing
Rotary Position Sensing
Current Sensing
Ordering Information
Part No.
MLX90215
MLX90215
Temperature Suffix
L
E
Package
VA(4 Lead SIP)
VA(4 Lead SIP)
Temperature Range
-40°C to 150°C
-40°C to 85°C
Functional Diagram
VDD
1
OTPROM (ROM)
Shift Register (RAM)
2
Program
Decoder
Hall Plate
Chopper
3
4
Pin 1 - VDD (Supply)
Pin 2 - Test/Readback Enable
Pin 3 - VSS (Ground)
Pin 4 - Output
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.
Note: Static sensitive device, please observe ESD precautions.
MLX90215 Programmable Hall Effect Sensor
Rev 4.3
7/6/01
Page 1




MLX90215 pdf, 반도체, 판매, 대치품
Temperature Compensation
Temperature compensation (TC) is defined as the
change in sensitivity over temperature. Expressed in
(Parts Per Million per Degree Celcius) ppm/ oC.
TC
=
Sens T1 Sens T 2
Sens 25
1 10 6
T1T 2
ppm
oC
SensT1 = Sensitivity measured at Temperature 1 (T1)
SensT2 = Sensitivity measured at Temperature 2 (T2)
Sens25 = Initial Sensitivity measured at 25o C
Table 3 - Temperature Compensation
TC Code Min
Typical
Max
Units
0 -600 -450 -300 ppm/oC
1 -535 -385 -235 ppm/oC
2 -465 -315 -165 ppm/oC
3 -390 -240 -90 ppm/oC
4 -300 -150 0 ppm/oC
5 -235 -85 65 ppm/oC
6 -150 0 150 ppm/oC
7 -85 65 215 ppm/oC
8 125 275 425 ppm/oC
9 125 360 510 ppm/oC
10 210 435 585 ppm/oC
11 285 515 665 ppm/oC
12 450 600 750 ppm/oC
13 535 685 835 ppm/oC
14 600 750 900 ppm/oC
15 680 830 980 ppm/oC
16 1150 1300 1450 ppm/oC
17 1230 1380 1530 ppm/oC
18 1320 1470 1620 ppm/oC
19 1405 1555 1705 ppm/oC
20 1490 1640 1790 ppm/oC
21 1575 1725 1875 ppm/oC
22 1665 1815 1965 ppm/oC
23 1750 1900 2950 ppm/oC
24 2165 2365 2565 ppm/oC
25 2340 2490 2640 ppm/oC
26 2425 2575 2725 ppm/oC
27 2500 2650 2800 ppm/oC
28 2595 2745 2895 ppm/oC
29 2680 2830 2980 ppm/oC
30 2710 2910 3110 ppm/oC
31 2775 2975 3175 ppm/oC
MLX90215
Precision Programmable*
Linear Hall Effect Sensor
*Patent Pending
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 over temperature.
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 second line brand showing
“15DXX”
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.
Early revisions of the MLX90215 with second line
brand of “15AXX” should refer to factory for Tc code
Condition
VOUT Shorted to VDD
VOUT Shorted to VSS
VOUT open with pull up load
VOUT open with pull down load
VSS open with pull up load
VSS open with pull down load
> 10 K Ohms
VDD open with pull up load
> 4.7 K Ohms
VDD open with pull down load
Output Level
VOUT = VDD
VOUT = VSS
VOUT = VDD
VOUT = VSS
VOUT = VDD
VOUT = VDD
or 94% VDD
VOUT = VSS
or 3% VDD
VOUT = VSS
MLX90215 Programmable Hall Effect Sensor
Rev 4.3
7/6/01
Page 4

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MLX90215 전자부품, 판매, 대치품
Clamping the Output Voltage
The MLX90215 has a 2-bit CLAMP feature which
allows Four output voltage options. The CLAMP fea-
ture is independent of the gain, and will not effect sen-
sitivity of the device. The table below illustrates limits
for each of the four options.
Bit Value
0 (default))
1
2
3
Limits (% VDD)
no clamp
5 to 45
10 to 90
5 to 95
Application Comments
The following is a list of recommended operating pa-
rameters that will help to ensure the accuracy and sta-
bility 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. Tempera-
ture instability may be observed on some devices
under these conditions.
2.) Best linearity of sensitivity is obtained when VOQ
is programmed at 1/2 VDD. This is with the 1/2
VDD 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.
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 bend
ing.
C.) Avoid gluing device to another material. This
may cause temperature-related stress.
2.) CMOS products are static sensitive devices, please
observe ESD precautions.
3.) Observe temperature limits during soldering.
MLX90215
Precision Programmable*
Linear Hall Effect Sensor
*Patent Pending
Bit Allocation Table
Bit Function
1 INVERTSLOPE
2 OFFSETDAC 5
3 OFFSETDAC 6
4 OFFSETDAC 7
5 OFFSETDAC 8
6 OFFSETDAC 9
7 OFFSETDAC 4
8 OFFSETDAC 3
9 OFFSETDAC 2
10 OFFSETDAC 1
11 OFFSETDAC 0
12 FINEGAIN 0
13 FINEGAIN 1
14 FINEGAIN 2
15 HALFVDD
16 FINEGAIN 3
17 FINEGAIN 4
18 FINEGAIN 5
19 FINEGAIN 8
20 FINEGAIN 9
21 FINEGAIN 6
22 FINEGAIN 7
23 ROUGHGAIN 2
24 ROUGHGAIN 1
25 ROUGHGAIN 0
26 TEMP CO 0
27 TEMP CO 1
28 TEMP CO 2
29 TEMP CO 3
30 TEMP CO 4
31 CLAMP 1
32 CLAMP 0
33 MEMLOCK
34 TEST 0
35 TEST 1
36 TEST 2
37 TEST 3
MLX90215 Programmable Hall Effect Sensor
Rev 4.3
7/6/01
Page 7

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