AS5600_V01 datasheet(9/43 Pages) AMSCO

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[v1-06] 2018-Jun-20

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AS5600 − Detailed Description

The AS5600 is a Hall-based rotary magnetic position sensor

using planar sensors that convert the magnetic field

component perpendicular to the surface of the chip into a

voltage.

The signals coming from the Hall sensors are first amplified and

filtered before being converted by the analog-to-digital

converter (ADC). The output of the ADC is processed by the

hardwired CORDIC block (Coordinate Rotation Digital

Computer) to compute the angle and magnitude of the

magnetic field vector. The intensity of the magnetic field is used

by the automatic gain control (AGC) to adjust the amplification

level to compensate for temperature and magnetic field

variations.

The angle value provided by the CORDIC algorithm is used by

the output stage. The user can choose between an analog

output and a PWM-encoded digital output. The former provides

an output voltage which represents the angle as a ratiometric

linear absolute value. The latter provides a digital output which

represents the angle as the pulse width.

The AS5600 is programmed through an industry-standard I²C

interface to write an on-chip non-volatile memory. This

interface can be used to program a zero angle (start position)

and a maximum angle (stop position) which maps the full

resolution of the output to a subset of the entire 0 to 360 degree

range.

IC Power Management

The AS5600 be powered from a 5.0V supply using the on-chip

LDO regulator, or it can be powered directly from a 3.3V supply.

The internal LDO is not intended to power other external ICs

and needs a 1 μF capacitor to ground, as shown in Figure 13.

In 3.3V operation, the VDD5V and VDD3V3 pins must be tied

together. VDD is the voltage level present at the VDD5V pin.

Figure 13:

5.0V and 3.3V Power Supply Options

Detailed Description

1µF

100nF

4.5 - 5.5V

VDD3V3

GND

VDD5V

5.0V Operation

LDO

AS5600

100nF

3.0 – 3.6V*

VDD3V3

GND

VDD5V

3.3V Operation

LDO

AS5600

10µF**

** Required for OTP programming only

* 3.3-3.5V for OTP programming

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