AS5043 Programmable 360° Magnetic Angle Encoder

Revision 1.4, 04-Apr-06

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Page 12 of 26

12.2.1 Angular range Selector :

The Angular Range selector allows a digital pre-selection

of the angular range. The AS5043 can be configured for

a full scale angular range of 45°,90°,180° or 360°. In

addition, the Output voltage versus angle response can

be fine-tuned by setting the gain of the OP-AMP with

external resistors and the maximum output voltage can

be set in the DAC.

The combination of these options allows to configure the

operation range of the AS5043 for all angles up to 360°

and output voltages up to 5.5V

The response curve for the analog output is linear for the

selected range (45°/90°/180°/360°). In addition, the

slope is mirrored at 180° for 45°- and 90°- modes and

has a step response at 270° for the 180°-mode. This

allows the AS5043 to be used in a variety of applications.

mechanical angle is rotated beyond the selected analog

at the 360° point is also prevented due to a hysteresis.

Output

Range1

Output

Range0

Mode

Note

0

0

0

0°

256

90°

18 0°

2 7 0 °

360 °

0

angle*)

360° a ngular ra n ge (d efault)

10 23

512

768

1 024

default mode,

analog resolution= 10bit

(1024 steps) over 360°

analog step size:

1LSB = 0.35°

0

1

0

0°

90 °

18 0°

2 7 0 °

360 °

0

angle

180° a ngular ra n ge

10 23

2 56

51 2

768

1 024

analog resolution= 10bit

(1024 steps) over 180°

Analog step size:

1LSB = 0.175°

1

0

0

0°

90 °

18 0°

2 7 0 °

360 °

0

angle

90° an gula r rang e

10 23

2 56

51 2

768

1 024

analog resolution= 10bit

(1024 steps) over 90°

Analog step size:

1LSB = 0.088°

1

1

0

0°

90 °

18 0°

2 25°

360 °

0

angle

45° an gula r rang e

51 1

2 56

51 2

640

1 024

1 28

45°

analog resolution=

9 bit (512 steps) over 45°

Analog step size:

1LSB = 0.088°

*) Note: the resolution on the digital SSI interface is always 10bit (0.35°/step) over 360°, independent on analog mode

Table 5: Digital Range Selector programming options