as5045 austriamicrosystems, as5045 Datasheet - Page 20

• Manufacturer Part Number: as5045
• Description: 12-bit Programmable Magnetic Rotary Encoder
• Manufacturer: austriamicrosystems

AS5045 12-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER
14.6
(operating conditions: T
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
Revision 1.2, 03-Oct-06
Parameter
Resolution
Integral non-linearity (optimum)
Integral non-linearity (optimum)
Integral non-linearity
Differential non-linearity
Transition noise
Power-on reset thresholds
On voltage; 300mV typ. hysteresis
Off voltage; 300mV typ. hysteresis
Power-up time
System propagation delay
absolute output : delay of ADC,
DSP and absolute interface
Internal sampling rate for
absolute output:
Internal sampling rate for
absolute output
Read-out frequency
Electrical System Specifications
4095
2048
0
0 °
α
am b
12bit code
= -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless otherwise noted)
2
1
0
Symbol
INL
INL
t
RES
DNL
t
CLK
PwrUp
INL
TN
V
V
delay
f
f
S
S
0.09°
temp
on
off
opt
Figure 22: Integral and differential non-linearity (example)
TN
INL
Min
1,37
1.08
2.48
2.35
9.90
9.38
DNL+1LSB
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10.42
10.42
Typ
2.61
2.61
2.2
1.9
180°
Actual curve
Ideal curve
±0.044
2048
10.94
11.46
± 0.5
± 0.9
± 1.4
Max
0.06
0.03
2.74
2.87
384
2.9
2.6
12
20
80
96
1
Unit
RMS
MHz
Deg
kHz
kHz
deg
deg
deg
deg
ms
bit
µs
V
V
Fast mode (Mode = 1); Until status bit OCF = 1
Slow mode (Mode = 0 or open); Until OCF = 1
Note
0.088 deg
Maximum error with respect to the best line fit.
Centered magnet without calibration, T
Maximum error with respect to the best line fit.
Centered magnet without calibration,
Best line fit = (Err
Over displacement tolerance with 6mm diameter
magnet, without calibration, T
12bit, no missing codes
1 sigma, fast mode (MODE = 1)
1 sigma, slow mode (MODE=0 or open)
DC supply voltage 3.3V (VDD3V3)
DC supply voltage 3.3V (VDD3V3)
Fast mode (MODE=1)
Slow mode (MODE=0 or open)
T
T
T
T
Max. clock frequency to read out serial data
T
amb
amb
amb
amb
amb
= 25°C, slow mode (MODE=0 or open)
= -40 to +125°C, slow mode (MODE=0 or open)
= 25°C, fast mode (MODE = 1)
= -40 to +125°C, : fast mode (MODE = 1)
= -40 to +125°C
max
– Err
360 °
min
4095
) / 2
amb
= -40 to +125°C
α
amb
[degrees]
=25 °C.
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