Honeywell AMR 2-Pin PWM Speed and Direction Sensor Integrated Circuit VM721D1 Installation Guide

Honeywell AMR 2-Pin PWM Speed and Direction Sensor Integrated Circuit VM721D1 Installation Guide

GENERAL INFORMATION

Honeywell’s Anisotropic Magnetoresistive (AMR) 2-Pin Pulse Width Modulated (PWM) Speed and Direction Sensor Integrated Circuit (IC) is designed to detect the speed and direction of a ring magnet encoder target using a unique* bridge design.
The frequency of the digital supply current is proportional to the rotational speed of the target, and the rotational direction is encoded by modulating the pulse width of the supply current.
The sensor IC works over a wide range of speeds, temperatures and air gaps.

• Patent Pending

CAUTION

ELECTROSTATIC DISCHARGE DAMAGE

• Ensure proper ESD precautions  are followed when handling this product.
• Failure to comply with these instructions may result in product damage.

CAUTION

ELECTROSTATIC SENSITIVE DEVICES  DO NOT OPEN OR HANDLE EXCEPT AT A STATIC FREE WORKSTATION

SOLDERING AND ASSEMBLY

CAUTION
IMPROPER SOLDERING

• Ensure leads are adequately supported during any forming/shearing operation so that they are not stressed inside the plastic case.
• Limit exposure to high temperatures.

Failure to comply with these instructions may result in product damage

Wave solder at 250°C to 260°C [482°F to 500°F] for a maximum of three seconds. Burrs are allowed only if full lead length will pass through a 0,68 mm [0.027 in] dia. hole.

CLEANING

CAUTION
IMPROPER CLEANING

• Do not use pressure wash. High-pressure stream could force contaminants into the package.

Failure to comply with these instructions may result in product damage.

• Use agitated rinse to clean the sensor.

Table 1. Operating Characteristics (Over entire supply voltage range at -40°C ≤ TA ≤ 150°C, unless otherwise specified)

Characteristic| Symbol| Condition| Min.| Typ.| Max.| Unit
---|---|---|---|---|---|---
Supply voltage| VS| -40°C to 110°C| 4.0| —| 24| V
150°C| 4.0| —| 9.0
Supply current:|  |  |  |  |  |
high| ISh| digital high state| 12| 14| 16| mA
low| ISl| digital low state| 5.9| 6.95| 8.0|
Current ratio| —| —| 1.9| —| —| —
Pulse length:| ton|  |  |  |  | ms
forward| tfwd| —| 38| 45| 52
reverse| trev| —| 76| 90| 104
Output switching time:|  |  |  |  |  | ms
rise time| tr| metering resistor, no bypass capacitor| —| —| 8
fall time| tf| metering resistor, no bypass capacitor| —| —| 8
Switching frequency:|  |  |  |  |  |
forward| ffwd| limited by length of forward pulse| —| —| 14| kHz
reverse| frev| limited by length of reverse pulse| —| —| 8|

Table 2. Output Configuration

magnet rotating from pin 2 to pin 1 (CCW)

Table 3. Application Requirements (At 4.0 V ≤ VS ≤ 24 V, -40°C ≤ TA ≤ 150°C)

Characteristic| Symbol| Condition| Min.| Typ.| Max.| Unit
---|---|---|---|---|---|---
Magnetic flux| B| Dmax, max. air gap, max. temp.| ±30| —| —| Gauss
Magnetic flux with valid direction indication, increased jitter| __

B

| Dmax, max. air gap, max. temp.| __

±10

| __

—

| __

—

| __

Gauss

Metering resistor| R| —| 10| 100 to 300| —| Ohm

Table 4. Absolute Maximum Ratings

Characteristic| Symbol| Condition| Min.| Typ.| Max.| Unit
---|---|---|---|---|---|---
Operating temperature| Ta| —| -40 [-40]| —| 150 [302]| °C [°F]
Junction temperature| TJ| —| -40 [-40]| —| 165 [329]| °C [°F]
Storage temperature| TS| —| -40 [-40]| —| 150 [302]| °C [°F]
Thermal resistance| RqJA| —| —| —| —| °C/W
Supply voltage| VS| —| -26.5| —| 26.5| V
Soldering temperature| —| 3 s max.| —| —| 260 [500]| °C [°F]
ESD (HBM)| VESD| JEDEC JS-002-2014| —| —| ±6| kV

NOTICE

Absolute maximum ratings are the extreme limits 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.
Large, stray magnetic fields in the vicinity of the sensor may adversely affect sensor performance.

Maximum Supply Voltage Rating

Figure 1. Maximum Supply Voltage Rating

Block Diagram

Figure 2. Block Diagram

Figure 3. Basic Application Circuit

Figure 4. Rise and Fall Time Definition

• tr = 10% to 90% rise time
• tf = 90% to 10% fall time

Figure 5. Transfer Characteristics

Sensor IC Mounting Orientation

Figure 6. Sensor IC Mounting Orientation

• Radial
  

• Axial
  

Dimensions and Product Marking

Figure 7. Dimensions and Product Marking (For reference only mm/[in])

• Dimensions
  

• Product Marking
  

• Sensing Element Edge Distance
  

WARNING
RISK TO LIFE OR PROPERTY

Never use this product for an application involving serious risk to life or property without ensuring that the system as a whole has been designed to address the risks, and that this product is properly rated and installed for the intended use within the overall system.
Failure to comply with these instructions could result in death or serious injury.

Warranty/Remedy

Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship during the applicable warranty period. Honeywell’s standard product warranty applies unless agreed to otherwise by Honeywell in writing; please refer to your order acknowledgement or consult your local sales office for specific warranty details. If warranted  goods are returned to Honeywell during the period of coverage, Honeywell will repair or replace, at its option, without charge those items that Honeywell, in its sole discretion, finds defective.
The foregoing is buyer’s sole remedy and is in lieu of all other warranties, expressed or implied, including those of merchant ability and fitness for a particular purpose. In no event shall Honeywell be liable for consequential, special, or indirect damages .

While Honeywell may provide application assistance personally, through our literature and the Honeywell web site, it is buyer’ssole responsibility to determine  the suitability of the product in the application.

Specifications may change without notice. The information we supply is believed to be accurate and reliable as of this writing. However, Honeywell assumes no responsibility for its use.

For more information

Honeywell Advanced Sensing Technologies services its customers through a worldwide network of sales offices and distributors.
For application assistance, current specifications, pricing or the nearest Authorized Distributor, visit sps.honeywell.com/ast or call:

Asia Pacific +65 6355-2828
Europe +44 (0) 1698 481481
USA/Canada +1-800-537-6945

References

• Products - Advanced Sensing Technologies | Honeywell

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