AS5130-ASSU austriamicrosystems, AS5130-ASSU Datasheet - Page 29

• Manufacturer Part Number: AS5130-ASSU
• Description: IC ENCODER ROTARY 8-BIT 16-SSOP
• Manufacturer: austriamicrosystems
• Type: Linear, Rotary Encoder - Programmabler

Specifications of AS5130-ASSU

• Sensing Range: 32mT ~ 75mT
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 24mA
• Output Type: Analog, Ratiometric
• Features: Programmable
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output (max): -

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
8.3 Application Example III: Polling Mode
Figure 24. Polling Mode
Once powered up for at least 2.5ms, the AS5130 can be operated in a pulsed mode, where it is periodically turned on/off by a high side FET
(PMOS) switching transistor with a low Ron (<10Ω). The on-time is at least 250µs in order to perform one measurement. A valid measurement
result can be verified by checking the lock bit (ADC is locked) in the serial data stream.
After startup an OTP reset has to be performed in order to read out valid trimming information. Then a special SSI command (STORE REF)
copies the actual angle into a buffered reference angle register. Now the AS5130 can be turned off. Special registers will be buffered by the low
power supply and will keep the actual settings. After a t
angle difference is larger than a threshold value (wlsb, SSI command WRITE CUST), the AS5130 will send an interrupt request to an external
device via the WAKE pin.
Due to the internal POR level of the IC, t
pulsed mode depends on the supply current in active mode and the duty cycle of the on/off pulse:
Example: Sampling period = one measurement every 100ms. System constants = I
www.austriamicrosystems.com/AS5130
100n
+5V
on
starts after V
AS5130
AS5130
S
I
V
VDD
avg
SS
=
on
N
DD
------------------------------------------
250μs
of min. 250 us, the actual angle is compared with the stored reference angle. If the
19mA ∗ 250μs
I
avg
has reached 4.3V (worst case POR level).The average power consumption in this
=
+
I
------------------------ -
active
t
99.75ms
on
CS
CLK
DIO
Revision 1.11
+
10k
∗ t
t
off
on
= 47.5µA
>1µF
Cx
t
on
active
t
off
= 19mA, t
on/off
controller
micro
V
V
DD
SS
on
(min) = 250µs:
VDD
+5V
V
SS
(EQ 10)
(EQ 11)
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