AS5130ASST datasheet(28/40 Pages) AMSCO

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AS5130

Data Sheet - A p p l i c a t i o n I n f o r m a t i o n

Figure 20. 3-Wire Angle Sensor

Application Example III: 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 sleep mode 2mA. The fastest possible startup time from low power mode is 150µs. 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 150µs.

Figure 21. Low Power Encoder

Iavg =

(EQ 8)

Example: sampling period = one measurement every 10ms.

System constants = Iactive = 15mA, Ipower_down = 2 mA, toff = 9,85ms, ton(min) = 150µs (start-up from low power mode):

Iavg =

= 2.195mA

(EQ 9)

AS5130

100n

VSS

+5V

DCLK

DIO

CAO

LED1

AS5130

VDD

VSS

AS5130

PROG

PWM out

PWM

CAO

VDD

VSS

micro

controller

AS5130

100n

VSS

+5V

AVDD

VDD

DIO

VSS

AS5130

on/off

CLK

Iactive∗ton Ipowerdown∗toff

ton toff

---------------------------------------------------------------------

15mA∗150

μs 2mA∗985ms

150

μs 985ms

--------------------------------------------------------------------------

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