AS5245-HQFT austriamicrosystems, AS5245-HQFT Datasheet - Page 13

• Manufacturer Part Number: AS5245-HQFT
• Description: IC ENCODER PROG 32-QFN
• Manufacturer: austriamicrosystems
• Type: Linear, Rotary Encoder - Programmabler

Specifications of AS5245-HQFT

• Sensing Range: 45mT ~ 75mT
• Voltage - Supply: 3 V ~ 3.6 V, 4.5 V ~ 5.5 V
• Current - Supply: 21mA
• Current - Output (max): 4mA
• Output Type: Quadrature with Index (Incremental)
• Features: Programmable
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 32-VQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AS5245
Data Sheet - D e t a i l e d D e s c r i p t i o n
Figure 6. Incremental Output
The hysteresis trimming is done at the final test (factory trimming) and set to 4 LSB, related to a 12 bit number.
Incremental Output Hysteresis.
of a rotational direction change, the incremental outputs have a hysteresis of 4 LSB. Regardless of the programmed incremental resolution, the
hysteresis of 4 LSB always corresponds to the highest resolution of 12 bit. In absolute terms, the hysteresis is set to 0.35 degrees for all
resolutions. For constant rotational directions, every magnet position change is indicated at the incremental outputs
if the magnet turns clockwise from position “x+3“ to “x+4“, the incremental output would also indicate this position accordingly. A change of the
magnet’s rotational direction back to position “x+3“ means that the incremental output still remains unchanged for the duration of 4 LSB, until
position “x+2“is reached. Following this direction, the incremental outputs will again be updated with every change of the magnet position.
Figure 7. Hysteresis Window for Incremental Outputs
www.austriamicrosystems.com/AS5245
D Test2_B
D Test1_A
Mode_Index
Incremental
Output
Indication
To avoid flickering incremental outputs at a stationary magnet position, a hysteresis is introduced. In case
X +6
X +5
X +4
X +3
X +2
X +1
X
ClockWise
X
Counterclockwise Direction
X +1
Clockwise Direction
X +2
X +3
Hysteresis :
0.35°
Revision 1.5
X +4 X +5
Programmed
Zero Position
3 LSB
1 LSB
X +6
Magnet Position
Counter ClockWise
(see Figure
7). For example,
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