AS5040

Data Sheet

www.austriamicrosystems.com

Revision 2.10

2 - 33

4

Pin Configuration

Figure 2: Pin Configuration SSOP16

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

1

MagINCn

MagDECn

A_LSB_U

B_Dir_V

NC

Index_W

VSS

Prog

DO

CLK

CSn

PWM_LSB

NC

NC

VDD3V3

VDD5V

Pin Description

Table 2 shows the description of each pin of the standard SSOP16 package (Shrink Small Outline Package, 16 leads,

body size: 5.3mm x 6.2mmm; see Figure 2).

Pins 7, 15 and 16 are supply pins, pins 5, 13 and 14 are for internal use and must not be connected.

Pins 1 and 2 are the magnetic field change indicators, MagINCn and MagDECn (magnetic field strength increase or

decrease through variation of the distance between the magnet and the device). These outputs can be used to detect

the valid magnetic field range. Furthermore those indicators can also be used for contact-less push-button

functionality.

Pins 3, 4 and 6 are the incremental pulse output pins. The functionality of these pins can be configured through

programming the one-time programmable (OTP) register.

Table 1: Pin Assignment for the Different Incremental Output Modes

Output Mode

Pin 3

Pin 4

Pin 6

Pin 12

1.x: quadrature

A

B

Index

PWM

2.x:step/direction

LSB

Direction

Index

PWM

3.x: commutation

U

V

W

LSB

Mode 1.x: Quadrature A/B Output

Represents the default quadrature A/B signal mode.

Mode 2.x: Step / Direction Output

Configures pin 3 to deliver up to 512 pulses (up to 1024 state changes) per revolution. It is equivalent to the LSB

(least significant bit) of the absolute position value. Pin 4 provides the information of the rotational direction.

Both modes (mode 1.x and mode 2.x) provide an index signal (1 pulse/revolution) with an adjustable width of one LSB

or three LSB’s.