AS5035-T View Datasheet(PDF) - austriamicrosystems AG
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AS5035-T Datasheet PDF : 18 Pages
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AS5035 – 64 PPR INCREMENTAL MAGNETIC ROTARY ENCODER
5 Connecting the AS5035
5.1 Power Supply
5.1.1 5.0V Operation
Connect a 4.5V to 5.5V power supply to pin VDD5V only.
Add a 1µF to 10µF buffer capacitor to pin VDD3V3
5.2 Logic High and Low Levels
VDD5V will be either 3.0 - 3.6V or 4.5 - 5.5V, depending on
configuration.
In either case, the logic levels on output pins A, B and
Index will be
Vout high = VDD5V – 0.5V,
Vout low = VSS+0.4V.
5.1.2 3.3V Operation
Connect a 3.0V to 3.6 V power supply to both pins VDD5V
lid and VDD3V3. If necessary, add a 100nF ceramic buffer
capacitor to pin VDD3V3.
va 5V Operation
ill 100n
t VDD5V
VDD3V3
LDO
2.2...10µF
Internal
VDD
G s I
A t 4.5 - 5.5V
N
T
E
s n R
F
e A
C
m t E
a n VSS
A
B
Index
CSn
Prog
OTP_CLK
OTP_DO
The logic level on the CSn input pin will be
Vin high = VDD5V*0.7,
Vin low = VDD5V*0.3
5.3 Output Current
The available maximum output current on pins A, B and
Index to maintain the Vout high and Vout low levels is
2mA (sink and source) at VDD5V = 3.0V
4mA (sink and source) at VDD5V = 4.5V
5.4 Chip Select Pin CSn
5.4.1 Without Power-up Diagnostic Feature
For standalone operation without microcontroller, pin CSn
should be connected to VSS permanently. The incremental
outputs will be available, as soon as the internal offset
compensation is finished (within <50ms).
co 3.3V Operation
l VDD3V3
a VDD5V
LDO
nic 3.0 - 3.6V
Tech VSS
Internal
VDD
I
N
T
E
R
F
A
C
E
100n
A
B
Index
CSn
Prog
OTP_CLK
OTP_DO
5.4.2 With Power-up Diagnostic Feature
A diagnostic feature is available to detect a temporary loss
of power or initial power-up of the AS5035:
if the CSn pin is high or left open (internal pull up resistor
~50kΩ) during power-up, the incremental outputs will
remain in high state: A = B = Index = High.
This state indicates a power-up or temporary loss of power,
as in normal operation A, B and Index will never be high at
the same time. When Index is high, both A and B are low.
To clear this state end enable the incremental outputs,
CSn must be pulled low. The incremental outputs will
remain enabled if CSn returns to high afterwards.
Figure 4: Connections for 5V / 3.3V supply voltages
Revision 1.5
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