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AS5130
Datasheet - Application Information
8.2 Application Example II: Low-Power Encoder
Via SSI, the AS5130 will be able to toggle between active mode and low power mode. In active mode, the current consumption is ~15mA and in
low power mode 2mA. The fastest possible startup time from low power mode is 150祍. The AS5130 can be periodically switched between
active and low power mode, the average power consumption depends on the duty cycle. In order to read out the correct data, the active mode
time must be larger than 150祍.
Figure 23. Low Power Encoder
I
avg
 =
(EQ 8)
Example: sampling period = one measurement every 10ms.
System constants = I
active
 = 15mA, I
power_down
 = 2 mA, t
off
= 9,85ms, t
on
(min) = 150祍 (start-up from low power mode):
I
avg
 =
 = 2.195mA
(EQ 9)
VDD
VSS
micro
controller
AS5130
100n
VSS
+5V
VDD
CS
VDD
DIO
VSS
AS5130
S
N
on/off
CLK
active

t
on
I
powerdown

t
off
+
t
on
t
off
+
--------------- ----------------- ----------------- ----------------- - -
5mA

150?SPAN class="pst AS5130-ASST-500_2599059_5">s   2mA

9 85ms
,
+
150?SPAN class="pst AS5130-ASST-500_2599059_5">s   9  85ms
,
+
--------------- ----------------- ----------------- ----------------- ------ -
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