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AS5130

Data Sheet - D e ta 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:

Δ

(EQ 6)

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: 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

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, Figure 3 on page 10). The angle data is valid, as soon as the

LOCK- Flag is 1 (see Table 9).

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 14. Examples of the Overall Position Error caused by Speed (includes both propagation delay and filter delay)

Speed (rpm)

Total Position Error (

100

0,0175º

1000

0,175º

10000

1,75º

Table 15.

Mode

Current Consumption (typ)

Wake-up Time to Active Operation

Active Operation

14mA

1.0 ms (without AGC)

3.8 ms(with locked AGC)

Low Power Mode

1,4mA

0.15 ms

micro

controller

AS5130

100n

+5V

CS

DCLK

DIO

AS5130

C1

S

N

on/off

R1

C1