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AS5046 Programmable 360° Magnetic Angle Encoder – Preliminary Data Sheet

Revision 1.1

www.austriamicrosystems.com

Page 23 of 33

Range

Selector

OR1

OR0

ClampMdEN

0 360 ° 0

0 180 ° 1

1 90 ° 0

1 45 ° 1

10 bit

digital

REF_ extEN

0= int

DACref

VDD5V

0 - 100 % VDD5 V /2

LDO

3.3V

VDD3V3

916

DACout

VOUT

Rf_int

30k

Rg_int

30k

10bit

analog

FB_intEN

1=int

Gain = 2 x (int)

<100pF

360°angle

Vout

VDD

DAC

1= ext

0=ext

0 = 0-100 % * Vref( def.)

1= 10-9 0 % * Vref

VDD5V / 2

Vref

VSS

1-10µF

PROG

SDO

SCL

CSn

MagRngn

Mode

Magnetic field range alarm. Active

low. Leave open or connect to

VSS if not used

DAC output pin.

Leave open if no used

Test pins.

Leave open

from

DSP

RLmin

= 4k7

Mode pin.

Default = open

(low noise)

External DAC reference pin.

Leave open or connect to

VSS if not used

Digital serial

interface, 10bit/360°.

Leave open if not

used. CSn and CLK

may also be tied to

VSS if no used

for OTP

programming and

alignment mode

only. Leave open

or connect to VSS

if not used

OP-Amp feedback pin.

Leave open if not used.

Connect pins 15 and 16

for VDD = 3.0 – 3.6V.

Do NOT connect for

VDD = 4.5 – 5.5V!

Figure 17: Analog output block diagram

12.2.1 Angular Range Selector

The Angular Range selector allows a digital pre-selection

of the angular range. The AS5046 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 AS5046 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 AS5046 to be used in a variety of applications.

In these three modes, the output remains at Vout,max and

Vout,min to avoid a sudden output change when the

mechanical angle is rotated beyond the selected analog

range. In 360°-mode, a jitter between Vout,max and Vout,min

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

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