www.austriamicrosystems.com/AS5134

Revision 2.3

14 - 32

AS5134

Datasheet - Detailed Descr i pti on

7.7 Analog Output

This configuration is similar to the PWM connection (only three lines including supply are required). With the addition of a lowpass filter at the

PWM output, this configuration produces an analog voltage that is proportional to the angle. This filter can be either passive (as shown in

Figure 11) or active. The lower the bandwidth of the filter, the less ripple of the analog output can be achieved. If the AS5134 angular data is

invalid, the PWM output will remain at low state and thus the analog output will be 0V. Pins that are not shown may be left open.

Figure 11. Data Transmission with Pulse Width Modulated (PWM) Output

7.8 Quadrature A/B/Index Output

The phase shift between channel A and B indicates the direction of the magnet movement. Channel A leads channel B at a clockwise rotation of

the magnet (top view) by 90 electrical degrees. Channel B leads channel A at a counter-clockwise rotation.

Figure 12. Incremental Output Modes

Table 7. Programming Options for the Quadrature Signals A/B/Index

Abi (13:12)

Function: output multiplexer for pin A,B,I

00

A

 pin A, B  pin B, I(index)  pin I default value)

01

step

 pin A, direction  pin B, I(index)  pin I

10

pulse

 pin A, direction  pin B, I(index)  pin I

1

1

off: LO

 pin A, LO  pin B, LO  pin I

+5V

VDD

AS5134

VDD

PWM

VSS

C2

CS

100nF

>=4k7

>=4k7

>=1µF

>=1µF

Analog

out

VSS

5V

0V

0º

180º

360º

Analog out

PWM out

Angle

Index

B

A

Quad A/B/Index-Mode

max.

3 LSB

Index=0

1 LSB

Hyst=

2LSB

Mechanical

Zero Position

Mechanical

Zero Position

Rotation Direction

Change