as5040 austriamicrosystems, as5040 Datasheet - Page 6

• Manufacturer Part Number: as5040
• Description: 10-bit Programmable Magnetic Rotary Encoder
• Manufacturer: austriamicrosystems

AS5040 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER
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.
3.6
Synchronous Serial Interface (SSI)
(operating conditions: T
Revision 1.8
Parameter
Power-up time
System propagation delay
absolute output
System propagation delay
incremental output
Sampling rate for absolute
output
Read-out frequency
Parameter
Data output activated (logic
high)
First data shifted to output
register
Start of data output
Data output valid
Data output tristate
Pulse width of CSn
Read-out frequency
1023
512
0
Timing Characteristics
0 °
α
10bit code
2
1
0
am b
= -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless otherwise noted)
0.35°
Figure 3: Integral and differential non-linearity example (exaggerated curve)
TN
Symbol
Symbol
t
t
T
t
INL
DO tristate
t
DO active
t
CLK FE
DO valid
t
CLK
t
PwrUp
f
delay
CLK / 2
CLK
f
CSn
S
DNL+1LSB
Min
9.90
9.38
Min
500
500
357
500
>0
180°
Actual curve
Ideal curve
512
10.42
10.42
Typ
Typ
375
www.austriamicrosystems.com
10.94
11.46
Max
Max
192
100
394
100
50
48
1
1
Unit
Unit
MHz
MHz
kHz
ms
µs
µs
ns
ns
ns
ns
ns
ns
Until offset compensation finished
Note
Includes delay of ADC and DSP
Calculation over two samples
Internal sampling rate, T
Internal sampling rate, T
Max. clock frequency to read out serial data
Note
Time between falling edge of CSn and data output
activated
Time between falling edge of CSn and first falling
edge of CLK
Rising edge of CLK shifts out one bit at a time
Time between rising edge of CLK and data output
valid
After the last bit DO changes back to “tristate”
CSn = high; To initiate read-out of next angular
position
Clock frequency to read out serial data
360 °
1023
α
amb
amb
[degrees]
= 25°C
= -40 to +125°C
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