AS5040ASST datasheet(6/33 Pages) AMSCO

6 / 33 page

AS5040

Data Sheet

www.austriamicrosystems.com

Revision 2.10

6 - 33

Parameter

Symbol

Min

Typ

Max

Unit

Note

Magnetic offset

Boff

± 10

Constant magnetic stray field

Field non-linearity

Including offset gradient

fmag_abs

Absolute mode: 600 rpm @ readout of 1024

positions (see Table 6)

Input frequency

(rotational speed of

magnet)

fmag_inc

500

Incremental mode: no missing pulses at

rotational speeds of up to 30,000 rpm (see

Table 6)

0.25

Max. X-Y offset between defined IC package

center and magnet axis (see Figure 21)

Displacement radius

Disp

0.485

Max. X-Y offset between chip center and

magnet axis.

Chip placement

tolerance

±0.23

Placement tolerance of chip within IC

package (see Figure 23)

-0.12

NdFeB (Neodymium Iron Boron)

Recommended magnet

material and

temperature drift

-0.035

%/K

SmCo (Samarium Cobalt)

Electrical System Specifications

(operating conditions: Tamb = -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless otherwise

noted)

Parameter

Symbol

Min

Typ

Max

Unit

Note

Resolution

RES

bit

0.352 deg

7 bit

8 bit

9 bit

10 bit

LSB

2.813

1.406

0.703

0.352

deg

Adjustable resolution only available

for incremental output modes;

Least significant bit, minimum step

Integral non-linearity

(optimum)

INLopt

± 0.5

deg

Maximum error with respect to the

best line fit.

Verified at optimum magnet

placement, Tamb =25 °C.

Integral non-linearity

(optimum)

INLtemp

± 0.9

deg

Maximum error with respect to the

best line fit.

Verified at optimum magnet

placement ,

Tamb = -40 to +125°C

Integral non-linearity

INL

± 1.4

deg

Best line fit = (Errmax – Errmin) / 2

Over displacement tolerance with

6mm diameter magnet, Tamb = -40 to

+125°C

Differential non-linearity

DNL

± 0.176

deg

10bit, no missing codes

Transition noise

0.12

Deg

RMS

RMS equivalent to 1 sigma

Hysteresis

Hyst

0.704

deg

Incremental modes only

Power-on reset thresholds

On voltage; 300mV typ.

hysteresis

Off voltage; 300mV typ.

hysteresis

Von

Voff

1.37

1.08

2.2

1.9

2.9

2.6

DC supply voltage 3.3V (VDD3V3)

Power-up time

tPwrUp

Until offset compensation finished

System propagation delay

absolute output

tdelay

µs

Includes delay of ADC and DSP

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