AS5045

Data Sheet

www.austriamicrosystems.com

Revision 1.7

4 – 33

5

Pinout

5.1

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

NC

NC

NC

Mode

VSS

Prog_DI

DO

CLK

CSn

PWM

NC

NC

VDD3V3

VDD5V

5.2

Pin Description

Table 1

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 supply

pins, pins 3, 4, 5, 6, 13 and 14 are for internal use and must not be connected.

Pins 1 and 2 MagINCn and MagDECn

are the magnetic field change indicators (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.

Pin 6 Mode

allows switching between filtered (slow) and unfiltered (fast mode). This pin must be tied to VSS or

VDD5V, and must not be switched after power up. See chapter 8 Mode Input Pin.

Pin 8 Prog

is used to program the zero-position into the OTP (see chapter 11.1 Zero Position Programming).

This pin is also used as digital input to shift serial data through the device in Daisy Chain configuration,

(see chapter 8.2 Daisy Chain Mode).

Pin 11 Chip Select

(CSn; active low) selects a device within a network of AS5045 encoders and initiates serial data

transfer. A logic high at CSn puts the data output pin (DO) to tri-state and terminates serial data transfer. This pin is

also used for alignment mode (Figure 14) and programming mode (Figure 10).

Pin 12 PWM

allows a single wire output of the 10-bit absolute position value. The value is encoded into a pulse width

modulated signal with 1µs pulse width per step (1µs to 4096µs over a full turn). By using an external low pass filter,

the digital PWM signal is converted into an analog voltage, making a direct replacement of potentiometers possible.

Table 1.

Pin Description

Pin

Symbol

Type

Description

1

MagINCn

DO_OD

Magnet Field Magnitude INCrease; active low, indicates a distance reduction

between the magnet and the device surface. See Table 5

2

MagDECn

DO_OD

Magnet Field Magnitude DECrease; active low, indicates a distance increase

between the device and the magnet. See Table 5

3

NC

-

Must be left unconnected

4

NC

-

Must be left unconnected