as5046 austriamicrosystems, as5046 Datasheet - Page 9

• Manufacturer Part Number: as5046
• Description: Programmable 12-bit 360? Magnetic Angle Encoder With Absolute 2-wire Serial And Analog Interfaces
• Manufacturer: austriamicrosystems

AS5046 Programmable 360° Magnetic Angle Encoder – Preliminary Data Sheet
The AS5046 is tolerant to magnet misalignment and unwanted external magnetic fields due to differential measurement
technique and Hall sensor conditioning circuitry.
It is also tolerant to airgap and temperature variations due to Sin-/Cos- signal evaluation.
7
Figure 5: Connections for 5V / 3.3V supply voltages
Revision 1.0
3.3V / 5V Operation
4.5 - 5.5V
3.0 - 3.6V
5V Operation
3.3V Operation
100n
VDD5V
VDD5V
VSS
VSS
LDO
LDO
VDD3V3
VDD3V3
2µ2...10µF
Internal
VDD
Internal
VDD
N
E
R
A
C
E
N
E
R
A
C
E
T
F
T
F
I
I
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DO
CLK
DO
CLK
MODE
CSn
Prog
MODE
CSn
Prog
100n
The AS5046 operates either at 3.3V ±10% or at 5V
±10%. This is made possible by an internal 3.3V Low-
Dropout (LDO) Voltage regulator. The core supply
voltage is always taken from the LDO output, as the
internal blocks are always operating at 3.3V.For 3.3V
operation, the LDO must be bypassed by connecting
VDD3V3 with VDD5V (see Figure 5 ).
For 5V operation, the 5V supply is connected to pin
VDD5V, while VDD3V3 (LDO output) must be buffered by
a 2.2...10µF capacitor, which should be placed close to
the supply pin (see Figure 5).
The VDD3V3 output is intended for internal use only It
should not be loaded with an external load.
The voltage levels of the digital interface I/O’s
correspond to the voltage at pin VDD5V, as the I/O
buffers are supplied from this pin (see Figure 5).
A buffer capacitor of 100nF is recommended in both
cases close to pin VDD5V. Note that pin VDD3V3 must
always be buffered by a capacitor. It must not be left
floating, as this may cause an instable internal 3.3V
supply voltage which may lead to larger than normal jitter
of the measured angle.
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