AS5045TR View Datasheet(PDF) - austriamicrosystems AG
Part Name
Description
MFG CO.
'AS5045TR' PDF : 34 Pages View PDF
AS5045
Data Sheet
Table 5. Magnetic Field Strength Red-yellow-green Indicator (OTP option)
Status Bits
OTP: Mag CompEn = 1 (red-yellow-green programming
Hardware Pins
option)
Mag Mag
LIN
INC DEC
Mag
INCn
Mag
Description
DECn
0
0
0
Off
1
1
0
On
lid 1
1
1
On
a All other combinations
n/a
Off
No distance change
Magnetic input field OK (GREEN range, ~45…75mT)
YELLOW range: magnetic field is ~ 25…45mT or ~75…135mT. The
Off AS5045 may still be operated in this range, but with slightly reduced
accuracy.
On
RED range: magnetic field is ~<25mT or >~135mT. It is still possible to
operate the AS5045 in the red range, but not recommended.
n/a Not available
v Note: Pin 1 (MagINCn) and pin 2 (MagDECn) are active low via open drain output and require an external pull-up
resistor. If the magnetic field is in range, both outputs are turned off.
ill The two pins may also be combined with a single pull-up resistor. In this case, the signal is high when the magnetic
field is in range. It is low in all other cases (see Table 4 and Table 5).
G st 8.2 Daisy Chain Mode
A t The Daisy Chain mode allows connection of several AS5045’s in series, while still keeping just one digital input for
data transfer (see “Data IN” in Figure 6 below). This mode is accomplished by connecting the data output (DO; pin 9)
to the data input (PROG; pin 8) of the subsequent device. An RC filter must be implemented between each PROG
s n pin of device n and DO pin of device n+1, to prevent then encoders to enter the alignment mode, in case of ESD
e discharge, long cables, not conform signal levels or shape. Using the values R=100R and C=1nF allow a max. CLK
frequency of 1MHz on the whole chain. The serial data of all connected devices is read from the DO pin of the first
m t device in the chain. The length of the serial bit stream increases with every connected device, it is
a n n * (18+1) bits:
e.g. 38 bit for two devices, 57 bit for three devices, etc…
o The last data bit of the first device (Parity) is followed by a dummy bit and the first data bit of the second device
(D11), etc… (see Figure 7)
Technical c Figure 6. Daisy Chain Hardware Configuration
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