AS5043
Data Sheet – Programming the AS5043
Figure 14: Analog Output Block Diagram
Magnetic field range alarm. Active
low. Leave open or connect to
VSS if not used
Mode pin.
Default = open
(low noise)
External DAC reference pin.
Leave open or connect to
VSS if not used
VDD
1
Connect pins 15 and
16 for VDD= 3.0-3.6V.
Do NOT connect for
VDD = 4.5-5.5V !
9
16
1
2
DACref
VDD5V
Mode
AS5043 MagRngn
15
LDO
3.3V
VDD3V3
+
REF_extEN
1=ext
1-10µF
VDD5V / 2
0 360° 0
0 180° 1
0=int
1
1
90°
45°
0
1
10
Vref
OR1 OR0
DACout
VOUT
DAC output pin.
Leave open if not used
from
DSP
10bit
digital
Range
Selector
0 - 100% VDD5V /2
DAC
+
10bit
analog
Vout
12
2
Rf_int
30k
-
Rf
RLmin
= 4k7
CL
<100pF
ClampMdEN
0=ext
1=int
0= 0-100% * Vref (def.)
1= 10-90% * Vref
FB_intEN
Rg_int
30k
Rg
Gain = 2x (int)
11
FB
OP-Amp feedback pin.
Leave open if not used.
NC
CSn CLK DO PROG
NC
5
NC
13
VSS
7
14
3
4
6
8
VSS
3
Test pins.
Leave open
for OTP
programming and
alignment mode
only. Leave open
or connect to VSS
if not used
VDD
Vout
Digital serial
interface, 10bit/360°.
Leave open if not
used. CSn and CLK
may also be tied to
VSS if not used
0
360°angle
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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