AS5145 datasheet(9/36 Pages) AMSCO

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AS5145

Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s

6.2 System Specifications

TAMB = -40 to +150°C, VDD5V = 3.0 to 3.6V (3V operation) VDD5V = 4.5 to 5.5V (5V operation) unless otherwise noted.

Disp

Displacement radius

Max. offset between defined device center

and magnet axis

(see Figure 19)

0.25

Ecc

Eccentricity

Eccentricity of magnet center to rotational axis

100

µm

Recommended magnet material and

temperature drift

NdFeB (Neodymium Iron Boron)

-0.12

%/K

SmCo (Samarium Cobalt)

-0.035

Table 5. Input Specification

Symbol

Parameter

Condition

Min

Typ

Max

Unit

RES

Resolution

0.088 deg

bit

INLopt

Integral non-linearity (optimum)

Maximum error with respect to the best line fit.

Centered magnet without calibration, TAMB

=25 ºC.

± 0.5

deg

INLtemp

Integral non-linearity (optimum)

Maximum error with respect to the best line fit.

Centered magnet without calibration,

TAMB = -40 to +150ºC

± 0.9

deg

INL

Integral non-linearity

Best line fit = (Errmax – Errmin) / 2

Over displacement tolerance with 6mm

diameter magnet, without calibration, TAMB =

-40 to +150ºC

± 1.4

deg

DNL

Differential non-linearity

12bit, no missing codes

± 0.044

deg

Transition noise

1 sigma, fast mode (MODE = 1)

0.06

Deg

RMS

1 sigma, slow mode

(MODE = 0 or open)

0.03

tPwrUp

Power-up time

Fast mode (Mode = 1);

Until status bit OCF = 1

Slow mode (Mode = 0 or open);

Until OCF = 1

tdelay

System propagation delay

absolute output : delay of ADC, DSP

and absolute interface

Fast mode (MODE = 1)

µs

Slow mode (MODE = 0 or open)

384

Internal sampling rate for absolute

output:

TAMB = 25ºC, slow mode

(MODE=0 or open)

2.48

2.61

2.74

kHz

TAMB = -40 to +150ºC, slow mode (MODE=0

or open)

2.35

2.61

2.87

Internal sampling rate for absolute

output

TAMB = 25ºC, fast mode

(MODE = 1)

9.90

10.42

10.94

kHz

TAMB = -40 to +150ºC, fast mode

(MODE=1)

9.38

10.42

11.46

CLK/SEL

Read-out frequency

Max. clock frequency to read out serial data

MHz

Table 4. Magnetic Input Specification

Symbol

Parameter

Condition

Min

Typ

Max

Unit

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