AS5046-ASST austriamicrosystems, AS5046-ASST Datasheet - Page 32

• Manufacturer Part Number: AS5046-ASST
• Description: IC ENCODER PROG 12-BIT 16-SSOP
• Manufacturer: austriamicrosystems
• Type: Linear, Rotary Encoder - Programmabler

Specifications of AS5046-ASST

• 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: Analog, Ratiometric
• Features: Programmable
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AS5046-ASSTTR

AS5046
Data Sheet
17 Alignment Mode
The alignment mode simplifies centering the magnet over the chip to gain maximum accuracy and XY-alignment
tolerance.
This electrical centering method allows a wider XY-alignment tolerance (0.485mm radius) than mechanical centering
(0.25mm radius) as it eliminates the placement tolerance of the die within the IC package (+/- 0.235mm).
Alignment mode can be enabled with the falling edge of CSn while PROG = logic high (Figure 19). The Data bits D11-
D0 of the serial interface change to a 12-bit displacement amplitude output. A high value indicates large X or Y
displacement, but also higher absolute magnetic field strength. The magnet is properly aligned, when the difference
between highest and lowest value over one full turn is at a minimum.
Under normal conditions, a properly aligned magnet will result in a reading of less than 128 over a full turn.
Stronger magnets or short gaps between magnet and IC may show values larger than 128. These magnets are still
properly aligned as long as the difference between highest and lowest value over one full turn is at a minimum.
The MagInc and MagDec indicators will be = 1 when the alignment mode reading is < 128. At the same time,
hardware pin MagRngn (#1) will be pulled to VSS.
The Alignment mode can be reset to normal operation mode by a power-on-reset (cycle power supply) or by a falling
edge of CSn with PROG=low (see Figure 20).
Figure 19
Figure 20
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Enabling the Alignment Mode
Exiting Alignment Mode
Revision 1.12
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