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AS5043ASST Datasheet(PDF) 15 Page - ams AG

Part # AS5043ASST
Description  Programmable 360 Magnetic Angle Encoder with Absolute SSI and Analog Outputs
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS5043ASST Datasheet(HTML) 15 Page - ams AG

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AS5043
Data Sheet – Programming the AS5043
www.austriamicrosystems.com
Revision 1.80
15 – 36
Figure 14: Analog Output Block Diagram
AS5043
Range
Selector
OR1
OR0
ClampMdEN
0 360° 0
0 180° 1
1 90° 0
1 45° 1
10bit
digital
REF_extEN
0=int
DACref
VDD5V
+
-
0 - 100% VDD5V /2
LDO
3.3V
VDD3V3
916
15
DACout
10
VOUT
12
Rf_int
30k
Rg_int
30k
10bit
analog
FB
11
FB_intEN
1=int
Gain = 2x (int)
CL
<100pF
360°angle
0
Vout
VDD
DAC
1=ext
0=ext
0= 0-100% * Vref (def.)
1= 10-90% * Vref
VDD5V / 2
Vref
VDD
VSS
1-10µF
7
PROG
DO
CLK
CSn
for OTP
programming and
alignment mode
only. Leave open
or connect to VSS
if not used
Digital serial
interface, 10bit/360°.
Leave open if not
used. CSn and CLK
may also be tied to
VSS if not used
34
6
8
MagRngn
Mode
Magnetic field range alarm. Active
low. Leave open or connect to
VSS if not used
Mode pin.
Default = open
(low noise)
OP-Amp feedback pin.
Leave open if not used.
DAC output pin.
Leave open if not used
External DAC reference pin.
Leave open or connect to
VSS if not used
NC
13
Test pins.
Leave open
NC
5
NC
14
2
1
Connect pins 15 and
16 for VDD= 3.0-3.6V.
Do NOT connect for
VDD = 4.5-5.5V !
from
DSP
1
2
3
RLmin
= 4k7
Vout
VSS
Rf
Rg
12.2.1 Angular Range Selector
The Angular Range selector allows a digital pre-selection of the angular range. The AS5043 can be configured for a full
scale angular range of 45°, 90°, 180° or 360°. In addition, the Output voltage versus angle response can be fine-tuned by
setting the gain of the OP-AMP with external resistors and the maximum output voltage can be set in the DAC.
The combination of these options allows to configure the operation range of the AS5043 for all angles up to 360° and
output voltages up to 5.5V.
The response curve for the analog output is linear for the selected range (45°/90°/180°/360°). In addition, the slope is
mirrored at 180° for 45°- and 90°- modes and has a step response at 270° for the 180°-mode. This allows the AS5043 to
be used in a variety of applications. In these three modes, the output remains at Vout,max and Vout,min to avoid a sudden
output change when the mechanical angle is rotated beyond the selected analog range. In 360°-mode, a jitter between
Vout,max and Vout,min at the 360° point is also prevented due to a hysteresis.


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