AS5245HQFT datasheet(9/33 Pages) AMSCO

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AS5245

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 +150ºC, VDD5V = 3.0 to3.6V (3V operation) VDD5V = 4.5 to5.5V (5V operation) unless otherwise noted.

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

=25ºC.

±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

Maximum clock frequency to read out serial

data

1MHz

Table 4. Magnetic Input Specification

Symbol

Parameter

Condition

Min

Typ

Max

Unit

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