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Magnetic field sensor using AD22151
Magnetic field sensor project using AD22151 IC from Analog Devices, The AD22151 is a linear magnetic field transducer. The sensor output is a voltage proportional to a magnetic field applied perpendicularly to the package top surface. The sensor combines integrated bulk Hall cell technology and instrument technology to minimize temperature-related drifts associated with silicon Hall cell characteristics.
Features
- Supply 5V DC @ 25mA
- Power Led On Board
- Header connector for supply and output
- Normal Output 1.800V
- South side Magnet Output 4.800V
- North side Magnet Output 0.042V
Applications
- Throttle Position Sensing
- Pedal Position Sensing
- Suspension Position Sensing
- Valve Position Sensing
- Absolute Position Sensing
- Proximity Sensing
Sensitivity Adjustment and Zero Gauss
The sensitivity of the sensor can be adjusted by changing some of the resistors on the board. For more information on how to calculate the resistors refer to the datasheet page 5, paragraph GAIN and OFFSET. The operation of AD22151 can be either bipolar or the Zero Gauss point can be set to a different voltage level. The gain can be set by altering resistors R3 and R5. For example, if we want to set for bipolar operation we set R2 and R1 is not placed. For unipolar operation, R1 is set and R2 is not placed. If we want to set output gain to 1.4mV/G with bipolar operation then we choose R5=R4=85k, R2= 18k, and R1=R3 =omit. This setting will give us a Zero Gauss output of 2.5V, so 2.5V/1.4mV gives us a ± 1785 Gauss output.
Schematic
Parts List
| SR. | QNTY | REF. | DESC. |
|---|---|---|---|
| 1 | 1 | CN1 | 2 PIN MALE HEADER 2.54MM PITCH |
| 2 | 1 | CN2 | 2 PIN MALE HEADER 2.54MM PITCH |
| 3 | 3 | C1,C2,C3 | 0.1uF/50V SMD 1206 |
| 4 | 1 | D1 | LED SMD SIZE 1206 |
| 5 | 1 | R1 | 18K SMD SIZE 1206 |
| 6 | 1 | R2 | Omit |
| 7 | 1 | R3 | 470K 1% SMD SIZE 1206 |
| 8 | 1 | R4 | 1K 1% SMD SIZE 1206 |
| 9 | 1 | R5 | 100K 1% SMD SIZE 1206 |
| 10 | 1 | R6 | 470E 5% SMD SIZE 1206 |
| 11 | 1 | U1 | AD22151 SMD SO8 |
Connections
Gerber View
Photos
Video
AD22151 Datasheet
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PCB
Please provide dimensions including
mounting hole diameter and location, sensor location, chip dimensions, pin dimensions
I’ve uploaded a PDF file with the PCB and dimensions. Check it above.
What is the thickness of the PCB?
PCB thickness is 1.6mm
Thank you. Then what is the total thickness? I mean the top to bottom height. I am considering of placing this entire sensor in a 3.9 mm thickness space. Is it possible?
I need 5 pieces currently.
PCB Thickness without components 1.6mm
PCB and Components 3.5mm without header right angle connector
PCB + Components + Connector =5.5MM
How can I buy it?
How many pieces do you need?
Thank you for replying. I would like to purchase 5 pieces of sensors. May I have your email for contact?
Please use the form here to contact us: https://www.electronics-lab.com/contact-us/
This is back in stock: https://www.electronics-lab.com/product/magnetic-field-sensor-using-ad22151/
Is this sensor accurate to measure in -10uT-10uT range?
This is measuring in Gauss and the sensitivity can be changed using some resistors.