AS5045TR View Datasheet(PDF) - austriamicrosystems AG
Part Name
Description
MFG CO.
'AS5045TR' PDF : 34 Pages View PDF
AS5045
Data Sheet
13 3.3V / 5V Operation
The AS5045 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 internal supply voltage is always taken from the output of the LDO, meaning that 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 16).
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 is supposed to be placed close to the supply pin (see Figure 16).
The VDD3V3 output is intended for internal use only It must not be loaded with an external load (see Figure 16).
lid Figure 16. Connections for 5V / 3.3V Supply Voltages
va 5V Operation
ill 100n
VDD5V
VDD3V3
LDO
2.2...10µF
Internal
VDD
G t I
s 4.5 - 5.5V
N
T
A t E
R
F
s n A
C
E
e VSS
DO
PWM
CLK
CSn
Prog
3.3V Operation
VDD5V
VDD3V3
LDO
3.0 - 3.6V
VSS
Internal
VDD
I
N
T
E
R
F
A
C
E
100n
DO
PWM
CLK
CSn
Prog
am nt A buffer capacitor of 100nF is recommended in both cases close to pin VDD5V. Note that pin VDD3V3 must always
o be buffered by a capacitor. It must not be left floating, as this may cause an instable internal 3.3V supply voltage
Technical c which may lead to larger than normal jitter of the measured angle.
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