AS5140H datasheet(13/55 Pages) AMSCO

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ams Datasheet

Page 13

[v1-09] 2018-Feb-20

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AS5140H − Electrical Characteristics

Timing Characteristics

TAMB = -40 to 150 ºC, VDD5V = 3.0 to 3.6V (3V operation)

VDD5V = 4.5 to 5.5V (5V operation), unless otherwise noted

Figure 16:

Synchronous Serial Interface (SSI)

Figure 17:

Pulse Width Modulation Output

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

tDO active

Data output activated

(logic high)

Time between falling edge of

CSn and data output

activated

100

tCLKFE

First data shifted to output

Time between falling edge of

CSn and first falling edge of

CLK

500

TCLK/2

Start of data output

Rising edge of CLK shifts out

one bit at a time

500

tDO valid

Data output valid

Time between rising edge of

CLK and data output valid

413

tDO tristate

Data output tristate

After the last bit DO changes

back to “tri-state”

100

tCSn

Pulse width of CSn

CSn =high; to initiate read-out

of next angular position

500

fCLK

Read-out frequency

Clock frequency to read out

serial data

MHz

Symbol

Parameter

Conditions

Min

Typ

Max

Units

fPWM

PWM frequency

Signal period = 1025μs ±5% at

TAMB = 25ºC

0.927

0.976

1.024

kHz

Signal period =1025μs ±10%

at TAMB = -40ºC to 150ºC

0.878

0.976

1.074

PWMIN

Minimum pulse width

Position 0d; angle 0 degree

0.90

1.10

μs

PWMAX

Maximum pulse width

Position 1023d; angle 359.65

degree

922

1024

1126

μs

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