AS5130ATST AMSCO [austriamicrosystems AG], AS5130ATST Datasheet - Page 23

• Manufacturer Part Number: AS5130ATST
• Description: 8 Bit Programmable Magnetic Rotary Encoder with Motion Detection & Multiturn
• Manufacturer: AMSCO [austriamicrosystems AG]

AS5130
Data Sheet - D e t a i l e d D e s c r i p t i o n
In addition, the anti-aliasing filter causes an angle error calculated as:
Table 14. Examples of the Overall Position Error caused by Speed (includes both propagation delay and filter delay)
Reduced Power Modes
The AS5130 can be operated in three reduced power modes. All three modes have in common that they switch off or
freeze parts of the chip during intervals between measurements. In Low Power Mode or Ultra Low Power Mode, the
AS5130 is not operational, but due to the fast start-up, an angle measurement can be accomplished very quickly and
the chip can be switched to reduced power immediately after a valid measurement has been taken. Depending on the
intervals between measurements, very low average power consumption can be achieved using such a strobed
measurement mode.
Low Power Mode
The AS5130 can be put in Low Power Mode by simple serial commands, using the regular SSI commands. The
required serial command is WRITE CONFIG (17H,
LOCK- Flag is 1
In Reduced Power Modes, the AS5130 is inactive. The last state, e.g. the angle, AGC value, etc. is frozen and the chip
starts from this frozen state when it resumes active operation. This method provides much faster start-up than a “cold
start” from zero.
Figure 16. Low Power Mode and Ultra Low Power Mode Connection
Table 15.
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Low Power Mode: reduced current consumption, very fast start-up. Ideal for short sampling intervals (<3ms).
Power Cycling mode: zero power consumption (externally switched off) during sampling intervals, but slower start-
up than Polling Mode. Ideal for sampling intervals 200ms.
Polling Mode: for reduction of the average power consumption; especially suited for battery powered applications.
Low Power Mode
Active Operation
(see Table
Mode
Speed (rpm)
10000
1000
100
C1
9).
100n
Current Consumption (typ)
Δ
AS5130
θ
AS5130
lpf
= ArcTan [rpm / (60*f0)]
S
V
V
SS
DD
Figure 3 on page
N
C1
1,4mA
14mA
Revision 1.00
I
I
on
off
CS
DIO
DCLK
t
on
R1
t
off
Total Position Error (Δθ
10). The angle data is valid, as soon as the
on/off
Wake-up Time to Active Operation
controller
micro
V
V
DD
SS
0,0175º
0,175º
3.8 ms(with locked AGC)
1,75º
1.0 ms (without AGC)
V
+5V
V
DD
SS
0.15 ms
pd +
Δ
θ
lpf
)
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(EQ 6)