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AS5045B

Datasheet - Pin Assignm ents

Pin 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.

Pin 3 and 4 are used for incremental angle information in 12-bit quadrature signal format.

Pin 6 Index output used for incremental angle information. (Zero position reference).

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

Pin 8 (PDIO) is used to program the zero-position into the OTP(see page 17). This pin is also used as digital input to shift serial data through the

device in Daisy Chain configuration, (see page 13).

Pin 11 Chip Select (CSn; active low) selects a device within a network of AS5045Bs 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 (see Alignment Mode on page 21)

and programming mode (see Programming the AS5045B on page 17).

Pin 12 allows a single wire output of the 12-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,

e.g. for making a direct replacement of potentiometers possible.

CSn

11

Digital input pull-

down, Schmitt-Trigger

input

Chip Select. Active low. Schmitt-Trigger input, internal pull-up resistor

(50k

Ω)

PWM

12

Digital output

Pulse Width Modulation

NC

13

-

Must be left unconnected

NC

14

-

Must be left unconnected

VDD3V3

15

Supply pin

3V-Regulator Output, internally regulated from VDD5V. Connect to

VDD5V for 3V supply voltage. Do not load externally.

VDD5V

16

Supply pin

Positive Supply Voltage, 3.0V to 5.5V

Table 1. Pin Descriptions

Pin Name

Pin Number

Pin Type

Description