AS5045-ASST datasheet(14/47 Pages) AMSCO

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[v2-01] 2017-Jul-13

AS5045 − Detailed Description

Mode Input Pin

The mode input pin activates or deactivates an internal filter

that is used to reduce the analog output noise. Activating the

filter (Mode pin = LOW) provides a reduced output noise of 0.03°

rms. At the same time, the output delay is increased to 384μs.

This mode is recommended for high precision, low speed

applications.

Deactivating the filter (Mode pin = HIGH) reduces the output

delay to 96μs and provides an output noise of 0.06° rms. This

mode is recommended for higher speed applications.

The MODE pin should be set at power-up. A change of the mode

during operation is not allowed.

Switching the Mode pin affects the following parameters.

Figure 12:

Slow and Fast Mode Parameters 12-Bit Absolute Angular Position Output

Parameter

Slow Mode

(Mode = Low)

Fast Mode

(Mode = High, VDD5V)

Sampling rate

2.61 kHz (384 μs)

10.42 kHz (96μs)

Transition noise (1 sigma)

≤ 0.03° rms

≤ 0.06° rms

Output delay

384μs

96μs

Max. speed @ 4096 samples/rev.

Max. speed @ 1024 samples/rev.

Max. speed @ 256 samples/rev.

Max. speed @ 64 samples/rev.

38 rpm

153 rpm

610 rpm

2441 rpm

153 rpm

610 rpm

2441 rpm

9766 rpm

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