AS5045 12-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER

Revision 1.5

www.austriamicrosystems.com

Page 6 of 24

3.6

Electrical System Specifications

Parameter

Symbol

Min

Typ

Max

Unit Note

Resolution

RES

12

bit

0.088 deg

Integral non-linearity (optimum)

± 0.5

deg

Maximum error with respect to the best line fit.

Integral non-linearity (optimum)

± 0.9

deg

Maximum error with respect to the best line fit.

Centered magnet without calibration,

Integral non-linearity

INL

± 1.4

deg

Over displacement tolerance with 6mm diameter

Differential non-linearity

DNL

±0.044

deg

12bit, no missing codes

0.06

1 sigma, fast mode (MODE = 1)

Transition noise

TN

0.03

Deg

RMS 1 sigma, slow mode (MODE=0 or open)

Power-on reset thresholds

On voltage; 300mV typ. hysteresis

Off voltage; 300mV typ. hysteresis

1.37

1.08

2.2

1.9

2.9

2.6

V

V

DC supply voltage 3.3V (VDD3V3)

DC supply voltage 3.3V (VDD3V3)

20

Fast mode (Mode = 1); Until status bit OCF = 1

Power-up time

80

ms

Slow mode (Mode = 0 or open); Until OCF = 1

96

Fast mode (MODE=1)

System propagation delay

absolute output : delay of ADC,

DSP and absolute interface

384

µs

Slow mode (MODE=0 or open)

2.48

2.61

2.74

Internal sampling rate for

absolute output:

2.35

2.61

2.87

kHz

9.90

10.42

10.94

Internal sampling rate for

absolute output

9.38

10.42

11.46

kHz

Read-out frequency

CLK

1

MHz Max. clock frequency to read out serial data

180°

360 °

0 °

0

2048

4095

α

0

1

2

0.09°

INL

Ideal curve

Actual curve

TN

2048

4095

DNL+1LSB

[degrees]

Figure 3: Integral and differential non-linearity (example)

Integral Non-Linearity (INL) is the maximum deviation between actual position and indicated position.

Differential Non-Linearity (DNL) is the maximum deviation of the step length from one position to the next.

Transition Noise (TN) is the repeatability of an indicated position