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APS00A Datasheet(PDF) 3 Page - Honeywell Accelerometers

Part No. APS00A
Description  High Resolution Magnetic Angular Position Sensor IC
Download  6 Pages
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Maker  HONEYWELL-ACC [Honeywell Accelerometers]
Homepage  http://www.inertialsensor.com
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APS00A Datasheet(HTML) 3 Page - Honeywell Accelerometers

   
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Honeywell Sensing and Control
3
Figure 1. Detection of Relative Motion of a Magnet in Angular Displacement
The APS00B sensor can used to detect the relative motion of a magnet in
angular displacement.
Given a typical supply voltage of 5 V, each bridge will provide about 115 mV of
swing (±57.5 mV) on top of 2.5 V bias voltage. With +5 V applied to it, the
bridge performs a rail splitter function to create two near +2.5 V sources driven
apart by V as created by the magnetic field and the offset error voltage.
The bridge differential output voltages ( V) for the APS00B are:
VA = Vs S sin (2 θ) and VB = Vs S cos (2 θ) where:
Vs = Supply Voltage (V)
S = Material Constant = ( R/Rmax) *(1/2) = 11.5 mV/V nominal
θ = Reference to Magnetic Field Angle (°)
Please refer to Application Sheet
“How to Apply Honeywell APS00B Angular
Position Sensors ICs
” for additional details.
Figure 2. Electrical Diagram
Figure 3. Pinout and Sensing Element Location
The APS00B has two sensor bridges optimized for
rotary sensing applications. Thus the die is centered in
all three dimensions within the SOIC-8 package. The
figure below indicates the pin identification and the
sensing element location.
Bridge “A” output:
VoutA = Vs*S*sin(2θ) + VosA,
where:
S = 11.5 mV/V nominal
VosA = Bridge A Offset
(nominal = 0 V)
Bridge “B” output:
VoutB = Vs*S*cos(2θ) + VosB
where:
S = 11.5 mV/G nominal
VosB = Bridge B Offset
(nominal = 0 V)
Bridge A is centroidally co-located with Bridge B, and Bridge A
elements are rotated by 45° relative to Bridge B elements as
shown.
Figure 4. Typical Bridge Outputs vs Rotation Angle


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