as5043 austriamicrosystems, as5043 Datasheet - Page 6

• Manufacturer Part Number: as5043
• Description: 10-bit Programmable 360? Magnetic Angle Encoder With Absolute Digital And Analog Outputs
• Manufacturer: austriamicrosystems

AS5043 Programmable 360° Magnetic Angle Encoder
9
The absolute angular position is sampled at a rate of
10.4kHz (t=96µs) in fast mode and at a rate of 2.6kHz
(t=384µs) in slow mode.
These modes are selected by pin MODE (#2). The mode
input pin activates or deactivates an internal filter, which
is used to reduce the digital jitter and consequently the
analog output noise.
Activating the filter by pulling Mode = LOW or leaving it
open reduces the transition noise to <0.03° rms. At the
same time, the sampling rate is reduced to 2.6kHz and
the signal propagation delay is increased to 384µs. This
mode is recommended for high precision, low speed and
≤360° applications.
Deactivating the filter by setting Mode = HIGH increases
the sampling rate to 10.4kHz and reduces the signal
propagation delay to 96µs. The transition noise will
10 Daisy Chain Mode
The Daisy Chain Mode allows connection of
several AS5043’s in series, while still
keeping just one digital input for data
transfer (See “Data IN” in Figure 6 ). This
mode is accomplished by connecting the
data output (DO; pin 9) to the data input
(PROG; pin 8) of the subsequent device.
The serial data of all connected devices is
read from the DO pin of the first device in
the chain. The length of the serial bit
stream increases with every connected
device, it is
n * (16+1) bits:
The last data bit of the first device (Parity) is followed by a dummy bit and the first data bit of the second
device (D9), etc… (see Figure 7)
Revision 1.6, 3-Oct-06
e.g. 34 bit for two devices, 51 bit for three devices, etc…
CLK
CSn
DO
Mode Input Pin
t
D O active
t
C LK FE
T
CLK/2
t
1
DO valid
D9
D8
D7
D6
Angular Position Data
D5
Figure 7: Daisy Chain data transfer timing diagram
D4
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D3
8
D2
µC
D1
Data IN
CLK
CSn
1
D0
st
Device
increase to <0.06° rms. This mode is recommended for
higher speed and full scale = 360° applications.
Switching
parameters:
Pin MODE should be set at power-up. A mode change
during operation is not recommended.
O CF
Figure 6: Daisy Chain hardware configuration
sampling rate
transition noise
(1 sigma)
propagation
delay
Startup time
Parameter
CO F
DO
AS5043
1
CSn
st
Status Bits
Device
LIN
the
M ag
Prog
INC
CLK
Table 4: Mode pin settings
MODE
DEC
M ag
2.61 kHz
(383µs)
≤ 0.03° rms
384µs
20ms
slow mode
(Pin MODE = 0 or
open)
16
DO
Even
PAR
AS5043
2
CSn
nd
pin
Device
D
Angular Position Data
Prog
CLK
affects
2
1
D9
nd
Device
2
D8
DO
AS5043
last Device
the
10.42 kHz
≤ 0.06° rms
96µs
80ms
CSn
3
(95.9µs)
D7
fast mode
(Pin MODE = 1)
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following
Prog
CLK