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AS5311

Datasheet - E le c t r i ca l C h a ra c t e r is t i c s

6.5 Timing Characteristics

6.5.1 Pulse Width Modulation Output

Table 10. Synchronous Serial Interface (SSI)

Symbol

Parameter

Note

Min

Typ

Max

Units

tDOactive

Data output activated (logic high)

Time between falling edge of CSn and data

output activated

100

tCLKFE

First data shifted to output register

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

tDOvalid

Data output valid

Time between rising edge of CLK and data

output valid

413

tDOtristate

Data output tristate

After the last bit DO changes back to “tristate”

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

Table 11. Pulse Width Modulation Output

Symbol

Parameter

Note

Min

Typ

Max

Units

f PWM

PWM frequency

Signal period = 4098µs ±5% at

TAMB = 25°C

232

244

256

Signal period = 4098µs ±10% at

TAMB = -40 to +125°C

220

244

268

PW MIN

Minimum pulse width

Position 0d = 0µm

0.9

1.1

µs

PW MAX

Maximum pulse width

Position 4095d = 1999.5µm

3892

4097

4301

µs

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