AS5130-ASST austriamicrosystems, AS5130-ASST Datasheet - Page 12

• Manufacturer Part Number: AS5130-ASST
• Description: IC ENCODER ROTORY 8-BIT 16-SSOP
• Manufacturer: austriamicrosystems
• Type: Linear, Rotary Encoder - Programmabler

Specifications of AS5130-ASST

• Sensing Range: 32mT ~ 75mT
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 24mA
• Output Type: Analog, Ratiometric
• Features: Programmable
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output (max): -
• Other names: AS5130-ASSTTR

AS5130
Data Sheet - D e t a i l e d D e s c r i p t i o n
The minimum PWM pulse width t
with 1LSB per step. At the maximum angle 358.6º (Angle reading = FF
(PWM = low) is 1 LSB. This leads to a total period (t
Figure 9. PWM Output Signal
Table 8. PWM Signal Parameters
This means that the PWM pulse width is (position + 1) LSB, where position is 0….255.
The tolerance of the absolute pulse width and frequency can be eliminated by calculating the angle with the duty cycle rather than with the
absolute pulse width:
results in an 8-bit value from 00
results in a degree value from 0º ...358.6º
Note: The absolute frequency tolerance is eliminated by dividing t
7.1.4 Analog Output
The AS5130 can generate a ratiometric analog output voltage by low-pass filtering the PWM output.
low pass filter as an example. In order to minimize the ripple on the analog output, the cut-off frequency of the low pass filter should be well below
the PWM base frequency.
www.austriamicrosystems.com/AS5130
Position
127
128
255
and T
0
PWM out
OFF
5V
in the same way.
0
0.556µs
178.59º
358.59º
Angle
180º
142.3µs
0º
H
ON
to FF
(PWM = high) is 1 LSB @ 0º (Angle reading = 00
H
,
LSB @ High
angle [ º ] =
angle [ 8 - bit ] =
128
129
256
ON
1
+ t
OFF
360
-------- -
256
) of 257LSB.
128
71.15µs
71.7µs
⎛
⎝
⎛
⎝
257
257
Revision 1.11
0.556µs
71.15µs
142.3µs
ON
t_high
71.7µs
H
), the pulse width t
--------------------------
t
--------------------------
t
by (t
ON
ON
t
t
+
ON
+
ON
ON
t
t
OFF
+T
OFF
OFF
⎞
⎠
⎞ 1 –
⎠
H
). 1LSB = nom. ,0.556µs. The PWM pulse width increases
), as the change of the absolute timing effects both T
Low Column
-1
ON
256
129
128
1
(PWM = high) is 256 LSB and the pause width t
142.3µs
0.556µs
Figure 10
142.3µs
71.15µs
0.556µs
255
71.7µs
shows a simple passive 2nd order
t_low
t
t
on
off
Position
Duty-Cycle
0.39%
49.4%
50.2%
99.6%
(EQ 1)
(EQ 2)
12 - 41
ON
OFF