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AS5130

Datasheet - Detailed Descr i pti on

Figure 10. Ratiometric Analog Output

7.1.5 Analog Sin/Cos Outputs with External Interpolator

These outputs allow the user to perform the angle calculation by an external ADC + µC, e.g. to compute the angle with a high resolution. In

addition, the inverted Sinus and Cosine signals (SINN, COSN; see dotted lines) are available for differential signal transmission.

The input resistance of the receiving amplifier or ADC should be greater than 100k

Ω. The signal lines should be kept as short as possible, longer

lines should be shielded in order to achieve best noise performance.

The SINN / COSN / SINP / COSP signals are amplitude controlled to ~1.3Vp (differential) by the internal AGC controller. The DC bias voltage is

2.25 V.

If the SINN and COSN outputs cannot be sampled simultaneously, it is recommended to disable the automatic gain control (see Table 9) as the

signal amplitudes may be changing between two readings of the external ADC. This may lead to less accurate results.

micro

controller

100n

+5V

VDD

PWM

AS5130

analog

out

R

≥4k7

C

≥1µF

Analog out

PWMout

Angle

360º

180º

0º

0V

5V