AS5045 AB austriamicrosystems, AS5045 AB Datasheet - Page 14

• Manufacturer Part Number: AS5045 AB
• Description: BOARD ADAPTER AS5045
• Manufacturer: austriamicrosystems

Specifications of AS5045 AB

• Sensor Type: Magnetic, Rotary Position
• Sensing Range: 360°
• Interface: Serial
• Voltage - Supply: 9V
• Embedded: No
• Utilized Ic / Part: AS5045
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Sensitivity: -

AS5045
Data Sheet
8.1.1
D11:D0 absolute angular position data (MSB is clocked out first)
OCF (Offset Compensation Finished), logic high indicates the finished Offset Compensation Algorithm
COF (Cordic Overflow), logic high indicates an out of range error in the CORDIC part. When this bit is set, the data
at D9:D0 is invalid. The absolute output maintains the last valid angular value.
This alarm may be resolved by bringing the magnet within the X-Y-Z tolerance limits.
LIN (Linearity Alarm), logic high indicates that the input field generates a critical output linearity.
When this bit is set, the data at D9:D0 may still be used, but can contain invalid data. This warning may be resolved
by bringing the magnet within the X-Y-Z tolerance limits.
Even Parity bit for transmission error detection of bits 1…17 (D11…D0, OCF, COF, LIN, MagINC, MagDEC)
Placing the magnet above the chip, angular values increase in clockwise direction by default.
Data D11:D0 is valid, when the status bits have the following configurations:
Table 3. Status Bit Outputs
*) MagInc=MagDec=1 is only recommended in YELLOW mode (see Table 5)
8.1.2
The AS5045 provides several options of detecting movement and distance of the magnet in the Z-direction. Signal
indicators MagINCn and MagDECn are available both as hardware pins (pins 1 and 2) and as status bits in the serial
data stream (see Figure 5). Additionally, an OTP programming option is available with bit MagCompEn (see
Figure 10) that enables additional features:
In the default state, the status bits MagINC, MagDec and pins MagINCn, MagDECn have the following function:
Table 4. Magnetic Field Strength Variation Indicator
When bit MagCompEn is programmed in the OTP, the function of status bits MagINC, MagDec and pins MagINCn,
MagDECn is changed to the following function:
www.austriamicrosystems.com
OCF
Mag
INC
Status Bits
1
0
0
1
1
Data Content
Z-axis Range Indication (Push Button Feature, Red/Yellow/Green Indicator)
COF
DEC
Mag
0
0
1
0
1
Hardware Pins
INCn
Mag
LIN
Off
Off
On
On
0
DECn
Mag
Off
On
Off
On
Mag
INC
1*)
0
0
1
OTP: Mag CompEn = 0 (default)
Description
No distance change
Magnetic input field OK (in range, ~45…75mT)
Distance increase; pull-function. This state is dynamic and only active while
the magnet is moving away from the chip.
Distance decrease; push- function. This state is dynamic and only active
while the magnet is moving towards the chip.
Magnetic field is ~<45mT or >~75mT. It is still possible to operate the
AS5045 in this range, but not recommended
Revision 1.7
Mag
DEC
1*)
0
1
0
Parity
Even checksum of bits 1:15
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