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AS5045 − Pin Assignment

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.

Figure 4:

Pin Description

Number

Pin Name

Pin Type

Description

1MagINCn

Digital output open

drain

Magnet Field Magnitude INCrease; active low, indicates

a distance reduction between the magnet and the

device surface (see Figure 16).

2MagDECn

Magnet Field Magnitude DECrease; active low,

indicates a distance increase between the device and

the magnet see Figure 16).

3NC

Must be left unconnected

4NC

5NC

6Mode

Select between slow (low, VSS) and fast (high, VDD5V)

mode. Internal pull-down resistor. Must be hard-wired

on the PCB in application.

VSS

Supply pin

Negative Supply Voltage (GND)

8Prog_DI

Digital input

pull-down

OTP Programming Input and Data Input for Daisy Chain

mode. Internal pull-down resistor (~74k

Ω). Connect to

VSS if not used

9DO

Digital output /

tri-state

Data Output of Synchronous Serial Interface

CLK

Digital input,

Schmitt-Trigger input

Clock Input of Synchronous Serial Interface;

Schmitt-Trigger input

CSn

Digital input pull-up,

Schmitt-Trigger input

Chip Select, active low; Schmitt-Trigger input, internal

pull-up resistor (~50k

Ω)

PWM

Digital output

Pulse Width Modulation of approx. 244Hz; 1μs/step

(optional 122Hz; 2μs/step)

Must be left unconnected

VDD3V3

Supply pin

3V-Regulator Output, internally regulated from VDD5V.

Connect to VDD5V for 3V supply voltage. Do not load

externally.

VDD5V

Positive Supply Voltage, 3.0 to 5.5 V

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