AS5040 Просмотр технического описания (PDF) - austriamicrosystems AG

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AS5040

10Bit 360° Programmable Magnetic Rotary Encoder

austriamicrosystems AG 

AS5040

Data Sheet

Parameter

System propagation delay

incremental output

Sampling rate for absolute

output

Read-out frequency

Symbol

fS

CLK

Min Typ

9.90 10.42

9.38 10.42

Max

192

10.94

11.46

1

Unit

Note

µs Calculation over two samples

kHz

MHz

Internal sampling rate, Tamb = 25°C

Internal sampling rate, Tamb = -40 to

+125°C

Max. clock frequency to read out

serial data

Figure 3: Integral and Differential Non-linearity Example (exaggerated curve)

1023 α 10bit code

Actual curve

2

TN

Ideal curve

1

DNL+1LSB

0

INL

0.35°

512

512

1023

0

0°

180°

360 °

α [degrees]

Integral Non-Linearity (INL) is the maximum deviation between actual position and indicated position.

Differential Non-Linearity (DNL) is the maximum deviation of the step length from one position to the next.

Transition Noise (TN) is the repeatability of an indicated position.

Timing Characteristics

Synchronous Serial Interface (SSI)

(operating conditions: Tamb = -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless otherwise

noted)

Parameter

Symbol Min Typ Max Unit

Note

Data output activated

(logic high)

t DO active

First data shifted to output

register

tCLK FE

500

Start of data output

T CLK / 2

500

Data output valid

t DO valid

357

Data output tristate

t DO tristate

Pulse width of CSn

t CSn

500

100

ns

Time between falling edge of CSn and

data output activated

ns

Time between falling edge of CSn and

first falling edge of CLK

ns

Rising edge of CLK shifts out one bit at a

time

413

ns

Time between rising edge of CLK and

data output valid

100

ns

After the last bit DO changes back to

“tristate”

ns

CSn = high; To initiate read-out of next

angular position

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Revision 2.10

7 - 33

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