AS5045B 데이터 시트보기 (PDF) - austriamicrosystems AG

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AS5045B

12-Bit Programmable Magnetic Position Sensor

austriamicrosystems AG 

AS5045B

Datasheet - Timing Characteristics

7 Timing Characteristics

TAMB = -40 to +125 ºC, VDD5V = 3.0 to 3.6V (3V operation) VDD5V = 4.5 to 5.5V (5V operation), unless otherwise noted. Also valid for version I.

Table 6. Timing Characteristics

Symbol

Parameter

Synchronous Serial Interface (SSI)

Conditions

Min Typ Max Units

tDOactive

Data output activated (logic high)

Time between falling edge of CSn and

data output activated

100

ns

tCLKFE

First data shifted to output register

Time between falling edge of CSn and

first falling edge of CLK

500

ns

TCLK/2

Start of data output

Rising edge of CLK shifts out one bit at a

time

500

ns

tDOvalid

Data output valid

Time between rising edge of CLK and

data output valid

413

ns

tDOtristate

Data output tri-state

After the last bit DO changes back to “tri-

state”

100

ns

tCSn

Pulse width of CSn

CSn =high; To initiate read-out of next

angular position

500

ns

fCLK

Read-out frequency

Pulse Width Modulation Output

Clock frequency to read out serial data >0

1

MHz

fPWM

PWM frequency

PWMIN

Minimum pulse width

PWMAX

Maximum pulse width

Programming Conditions

Signal period = 4098µs ±10% at TAMB

= -40 to +125ºC

220

244

268

Hz

Position 0d; angle 0 degree

0.90

1

1.10

µs

Position 4098d; angle 359.91 degrees 3686 4096 4506 µs

tPROG

tCHARGE

fLOAD

fREAD

fWRITE

Programming time per bit

Refresh time per bit

LOAD frequency

READ frequency

WRITE frequency

Time to prog. a single fuse bit

10

Time to charge the cap after tPROG

1

Data can be loaded at n x 2µs

Read the data from the latch

Write the data to the latch

20

µs

µs

500

kHz

2.5 MHz

2.5 MHz

www.ams.com

Revision 1.0

10 - 33

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