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Advanced Magnetic Sensors
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Honeywell Sensing & Control introduces Advanced Magnetic Sensors that offer additional functionality over basic Hall-effect or MR devices, such as the reduction of total costs, application flexibility, enhanced accuracy and stability, and simplification of system design.
- ASP00B is a miniature SMT sensor for linear, angular, or rotary displacement designed for magnetic saturating field sensing.
- VF401 is a high performance, digital, 2-wire, MR sensor in a miniature, flat, TO-92-style plastic package with a current output, designed for sensing fine pitch ring magnets.
- VF526DT has 2 Hall sensing elements in a thermoset molding material precisely located 1, 4mm apart on a single integrated circuit chip. 2 active Hall latches provide speed and direction indication of an alternating magnetic field across the face of the package.
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APS00B - High Resolution Magnetic Displacement Sensor
 Honeywell’s APS00B High Resolution Magnetic Displacement Sensor is a
miniature surface mount sensor for linear, angular, or rotary
displacement designed for magnetic saturating field sensing.
The APS00B creates an analog output voltage that varies with the
direction of the magnetic flux passing over the sensor surface. It
contains dual, saturated-mode Wheatstone bridges that generate
quadrature (sine and cosine) signals to provide an extended range of
angular measurements up to 180°.
This APS00B sensor is a cost-effective and space-efficient solution for
high-volume OEM designs. Potential applications include position
sensing, rotary speed and angle detection, and non-contact precision
location measurement systems. |
| APS00B sensors use Honeywell’s Anisotropic Magnetoresistive (AMR)
technology that provides advantages over Hall-effect-based magnetic
sensors. They are designed to resolve better than a tenth of a degree
or a tenth of a millimeter, to withstand large variations in
magnet-to-sensor gaps, and to exhibit insensitivity to shocks and
vibrations. Honeywell’s magnetic sensors are among the most precise and
reliable position sensors in the industry.
These surface mount devices are mounted directly on the electrical
traces on a PC (Printed Circuit) board. They are attached by an
automatic solder reflow operation which requires no hole, so it may
help reduce the cost of the PC board.  APS00B Datasheet
 View Product List
| Features and Benefits
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- Wide, angular range allows measurements of ±90° without additional components, making this device suitable for a variety of angular sensing applications. Measurements of ±180° are possible with external components.
- Resolution capability of less than 0.05° enhances overall system accuracy.
- Absolute sensing means no indexing is required and the exact target position is known, which can simplify the system design.
- Dual Wheatstone bridges provide a passive, low-noise design, enhancing system performance.
- Small, 8-pin surface-mount package saves room on the PC board when compared to larger IC (Integrated Circuit) packages and components.
- RoHS-compliant materials meet Directive 2002/95/EC.
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- Tape and reel configuration allows use with automated pick-and-place equipment, potentially reducing assembly costs (178 mm [7 in] and 330 mm [13 in] reels available).
- Typical 0 MHz to 5 MHz frequency response with 190 G minimum magnetic field applied makes this saturated mode sensor potentially suitable for high speed applications.
- Typically requires only 5 V at 4 mA to operate (20 mW), promoting energy efficiency.
- The sensors measure only field direction and are virtually unaffected by shock, vibration and magnetic-source gap variations, providing a stable, reliable output.
- Dual bridges with outputs 45° out of phase make it possible to use outputs as speed and direction signals.
- Honeywell APS00A instrumentation amplifier is available separately for additional signal processing.
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Potential Applications
| Transportation
- High accuracy angular position sensing
- Rotary speed and angle detection
- Non-contact precision displacement sensing
- Speed and direction sensing
| Industrial
- High accuracy position sensing
- Rotary speed and angle detection
- Non-contact precision displacement sensing
- Valve position
- Robotics control
| Medical
- High accuracy position sensing
- Rotary speed and angle detection
- Non-contact precision displacement sensing
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Absolute Maximum Ratings1
| | Characteristic | Min. | Max. | Unit | Supply Voltage
| -12 | +12 | V | Power dissipation
| -- | 200 | mW | Operating temperature
| -55 [-67]
| 150 [302]
| ºC [ºF] | Magnetic flux
| no limit
| Gauss | 1 Absolute maximum ratings are the extreme limits that the device will withstand without damage to the device. However, the electrical and mechanical characteristics are not guaranteed as the maximum limits (above recommended operating conditions) are approached, nor will the device necessarily operate at absolute maximum ratings.
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| Specifications (At Vs =5.0 V and Ta = 25ºC [77ºF] unless otherwise noted.)1
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| Characteristic |
Condition |
Min. |
Typ. |
Max. |
Unit |
| Supply voltage |
– |
1 |
5 |
12 |
V |
| Operating temperature |
– |
-40 [-40] |
– |
150 [302] |
°C [°F] |
| Bridge resistance |
bridges are connected in parallel |
0.9 |
1.25 |
1.6 |
kOhm |
| Supply current |
– |
– |
4 |
7 |
mA |
| Sensitivity |
– |
– |
2.1 |
2.3 |
mV/° |
| Angle range |
B > saturation field |
-90 |
– |
90 |
° |
| Resolution |
– |
– |
0.05 |
– |
° |
| Max output amplitude |
– |
47.5 |
57.5 |
67.5 |
mV |
| Min output amplitude |
– |
-47.5 |
-57.5 |
-67.5 |
mV |
| Output amplitude (peak to peak) |
– |
95 |
115 |
135 |
mV |
| Offset voltage |
– |
-1 |
– |
1 |
mV/V |
| Amplitude change from 25 °C |
140 °C [284 °F] |
-34 |
– |
-43 |
% |
| Amplitude change from 25 °C |
-40 °C [-40 °F] |
24 |
– |
31 |
% |
| Offset shift |
– |
-2 |
– |
2 |
mV |
| Synchronism |
(Amp A/Amp B) * 100 |
97 |
– |
103 |
% |
| Synchronism shift |
– |
-1 |
– |
1 |
% |
| Saturation level |
<10ìV/Gauss amplitude change |
60 |
190 |
– |
Gauss |
| Bandwidth |
– |
– |
0 to 5 |
– |
MHz |
| 1 To test the sensor against the specified magnetic characteristics, the sensor must be placed in a uniform magnetic field.
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VF401 - 2-Wire MR Fine-Pitch Ring Magnet Sensor
 Honeywell's VF401 is a high performance, digital, 2-wire, MR (magnetoresistive) sensor in a miniature, flat, TO-92-style, plastic package with a current output, designed for sensing fine pitch ring magnets.
The unique VF401 bridge array (patent number 6,297,628) has been optimized to allow a greater air gap between the target and the sensor with reduced loss in sensor signal or accuracy. VF401 Datasheet |
| The VF401 has a reduced sensitivity to run-out (shift in sensor position relative to the inside or outside diameter of the ring magnet). It is also less sensitive to tilt tolerance (deviation from parallel positioning of the sensing elements and ring magnet), accepting up to 10°, versus only 2° to 3° for typical ring magnet sensors, as well as being less sensitive to twist (deviation of perfect angular position of the bridge runners relative to the pole transitions).
View Product List |
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| | Features and Benefits |
| Potential Applications |
- Robust design operating from -40 °C to 150 °C [-40 °F to 302 °F] can withstand short durations up to 175 °C [347 °F], allowing use in potential applications with extreme temperature requirements.
- Not damaged by reverse polarity voltages when customer-supplied sense resistor is installed, enhancing protection.
- Patented MR bridge optimized for stable sensing of 20- to 50-pole pair ring magnets with improved insensitivity to run-out, tilt and twist.
- 2-wire digital current output simplifies wiring and interfacing which can reduce total system cost
- Enhanced sensitivity, ±7 Gauss typical, allows for larger air gaps (up to 2,5 mm [0.098 in]) and higher pole density (up to 50-pole pairs depending on ring diameter).
- One pulse per pole pair output and differential bridge operation allow compatibility with differential Hall sensors which can make it easier to upgrade existing applications.
- Wide speed capability provides application flexibility with true zero speed sensing and operation up to 3000 Hz.
- Output pattern independent of gap between target and sensor.
- RoHS-compliant materials meet Directive 2002/95/EC.
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| Transportation
- Speed encoding using a multipole ring magnet
- Enhanced accuracy rotational position sensing
- Wheel speed sensing
- Window lift applications
- Speed and direction sensing
Industrial
- Shaft speed encoding using a multipole ring magnet
- Enhanced accuracy rotational position sensing
- Precision motor speed measurement
- Speed control in machine tools
- Elevator speed sensing
- Speed control in motorized industrial equipment
Medical
- Shaft speed encoding using a multipole ring magnet
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Absolute Maximum Ratings1
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| | Characteristic | Min. | Typ. | Max. | Unit | Supply Voltage2
| -18 | -
| +18
| V
| Magnetic flux gauss
| no limit
| Temperature
| - | -
| 175 [347] for 10 min at 10 cycles
| ºC[ºF]
| Frequency
| - | -
| 3000 | Hz
| 1
Absolute maximum ratings are the extreme limits that the device will
momentarily withstand without damage to the device. Electrical and
mechanical characteristics are not guaranteed if the rated voltage and/or currents are exceeded nor will the device necessarily operate at absolute maximum ratings.
2 Customer-supplied sense resistor is required for negative reverse voltage.
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| Specifications (Established using a 65,00 mm [2.559 in] diameter, 48-pole pair ring magnet.)
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| Characteristic |
Condition |
Min. |
Typ. |
Max. |
Unit |
| Vcc1 |
– |
– |
– |
– |
V |
| Vh (V+ to V-) |
– |
4.5 |
– |
16 |
V |
| Icc operate |
– |
11.8 |
14 |
16.8 |
mA |
| Icc released |
– |
5.9 |
7 |
8.4 |
mA |
| Icc ratio (op/rel) |
– |
1.9 |
2 |
2.3 |
– |
| Rise time,10% to 90% |
Vcc = 12 V, RL = 150 Ohm, CL = 1000 pF, 25 °C [77 °F] |
– |
1.5 |
– |
µs |
| Fall time, 10% to 90% |
Vcc = 12 V, RL = 150 Ohm, CL = 1000 pF, 25 °C [77 °F] |
– |
1.5 |
– |
µs |
| Operating temperature |
– |
-40 [-40] |
– |
150 [302] |
°C [°F] |
Differential magnetic field over entire
MR bridge area:
operate
release |
– |
– |
+7
-7 |
– |
Gauss |
| Air gap2 |
– |
0.75 [0.030] |
– |
2.5 [0.098] |
mm [in] |
| Duty cycle |
– |
30 |
50 |
70 |
% |
| 1 Vcc is limited by Vh and the value chosen for the sense resistor.
2 Sensor operation at limits for air gap is dependent on ring magnet.
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ESD and EMC Performance
| | Test | Specification | Condition | Results | ESD (Electrostatic Discharge)
| GMW3100GS | - | Class 3 (low sensitivity)
| Electrical Transient Transmission
| ISO 7637-3
| electrical capacitance and inductive coupling
| Class B1
| Radiated Immunity
| ISO 11452-3
| 0.1 MHz to 12 GHz, 80% AM at 1 kHz
| Class A2 at 100 V/m
| 1 Class B: One or more functions may be out of specification during disturbance, but will automatically return to normal after exposure is removed.
2 Class A: All functions remain within specification during and after exposure to disturbance.
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VF526DT - Bipolar Latch, Dual Hall-effect Digital Position Sensorwith Speed and Direction Outputs |  Honeywell's VF526DT Bipolar Latch, Dual Hall-effect Digital Position Sensor has two distinct Hall sensing elements precisely located 1,4 mm [0.055 in] apart on a single integrated circuit chip. The elements are encapsulated in a thermoset molding material.
The two active Hall latches provide speed and direction indication of a magnetic gradient (such as a rotating ring magnet) across the face of the package. The miniature, 4-pin SOT-89B package surface mounts on PC (Printed Circuit) boards and flexible circuits. VF526DT Datasheet
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| The VF526DT’s built-in temperature compensation is designed to match the temperature coefficient of low-cost magnets, allowing for a reliable, yet cost-effective, sensor-magnet combination. A unique, regulator circuit provides extremely stable operation with supply voltages from 3.4 Vdc to 24 Vdc. It can directly interface with many electronic components without buffering or compensation circuitry.
View Product List
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| Features and Benefits
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| Potential Applications
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- Temperature-compensated magnetics and ultra-low offset drift with temperature provides a stable output over a full temperature range of -40 °C to 125 °C [-40 °F to 257 °F].
- Single, miniature 4-pin SOT-89B plastic package supplied on tape and reel for automated assembly, allowing potential savings in PC board space and labor cost.
- Two separate built-in Hall sensors and their associated logic circuitry provide a frequency signal for speed output and a logic level (high or low) signal for direction output, potentially replacing multiple sensors and electronic components.
- Wide operating voltage range of 3.4 Vdc to 24 Vdc increases application flexibility.
- Tested to moisture sensitivity similar to JEDEC J-STD-020B, MSL Level 1, allowing the VF526DT to be used in environments where humidity may be a problem.
- RoHS-compliant materials meet Directive 2002/95/EC.
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| Transportation
- Anti-pinch electric motor control systems for:
- power windows
- power seats (headrest)
- power sliding doors
- sunroofs
- Magnetic encoding for electronic steering systems
Industrial
- Motion control systems for pulleys and belts
- Garage door openers and sliding doors
- Position and velocity detection in industrial equipment
- Linear displacement sensing (using a magnetic strip of alternating poles)
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Absolute Maximum Ratings1
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| Characteristic |
Sym. |
Min. |
Max. |
Unit |
| Supply voltage |
Vcc |
-0.5 |
30 |
V |
| Output voltage (OFF) |
Vout |
-0.5 |
30 |
V |
| Output ON current |
Iout |
– |
10 |
mA |
| Storage temperature |
Ts |
-65 [-85] |
160 [320] |
°C [°F] |
| Operating temperature |
T |
-40 [-40] |
150 [302] |
°C [°F] |
| ESD: IEC 801-2, Lev 1 MIL-STD-883, Method
3015.7 |
ESD |
2 4 |
– – |
KV |
| Magnetic flux |
|
no limit |
– |
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| 1 Absolute maximum ratings are the extreme limits that the device will withstand without damage to the device. However, the electrical and mechanical characteristics are not guaranteed as the maximum limits (above recommended operating conditions) are approached, nor will the device necessarily operate at absolute maximum ratings.
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| Specifications |
| Characteristic |
Sym. |
Condition |
Min. |
Typ. |
Max. |
Unit |
| Magnetic actuation type |
bipolar latch
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| Output type |
dual open collector, sinking (speed and direction)
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| Supply voltage |
Vcc |
– |
3.4 |
– |
24 |
Vdc |
| Operating temperature |
Temp |
Vcc = 3.4 V to 24 V |
-40 [-40] |
– |
125 [257] |
°C [°F] |
| Supply current (OFF) |
Ioff |
Vcc = 24 V, -40 °C < T < 125 °C, Vout = 24 V, B<MIN REL |
– |
– |
12 |
mA |
| Supply current (ON) |
Ion |
Vcc = 24 V, -40 °C < T < 125 °C, Isink = 5 mA, B<MAX OP |
– |
– |
14 |
mA |
| Load current |
Isink |
Vcc = 24 V, -40 °C < T < 125 °C, Isink = 5 mA, B<MAX OP |
– |
– |
5 |
mA |
| Output saturation |
Vsat |
Vcc = 24 V, -40 °C < T < 125 °C, Isink = 5 mA, B<MAX OP |
– |
– |
0.4 |
V |
| Circuit speed to direct delay |
Td |
Vcc = 12 V, RL = 1.6 kOhm, CL = 20 pF |
– |
– |
5 |
µs |
| Rise time |
Tr |
Vcc = 12 V, RL = 1.6 kOhm, CL = 20 pF |
– |
– |
1.5 |
µs |
| Fall time |
Tf |
Vcc = 12 V, RL = 1.6 kOhm, CL = 20 pF |
– |
– |
1.5 |
µs |
| Frequency |
Top |
Vcc = 12 V, RL = 1.6 kOhm, CL = 20 pF |
<1 |
– |
>1000 |
Hz |
| Operate point |
Bop |
T = 25 °C -40 °C < T < 125 °C |
– 60 |
130 – |
– 200 |
Gauss |
| Release point |
Brel |
T = 25 °C -40 °C < T < 125 °C |
– -60 |
-130 – |
– -200 |
Gauss |
| Differential (OP-REL) |
Diff |
T = 25 °C -40 °C < T < 125 °C |
– 200 |
260 – |
– 320 |
Gauss |
| Symmetry ([OP +REL]/2) |
Sym |
T = 25 °C -40 °C < T < 125 °C |
– -65 |
0 – |
– 65 |
Gauss |
| Package style |
SOT-89B
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| Moisture sensitivity test |
similar to JEDEC J-STD-020B, MSL Level 1
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| Package quantity |
available in 1000/tape and reel
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