AS5045 View Datasheet(PDF) - austriamicrosystems AG

Part Name

Description

Manufacturer

AS5045

12 Bit Programmable Magnetic Rotary Encoder

austriamicrosystems AG 

AS5045

Data Sheet

Pin

Symbol

Type

Description

5

NC

-

Must be left unconnected

6

Mode

-

Select between slow (low, VSS) and fast (high, VDD5V) mode. Internal pull-down

resistor.

7

VSS

S

Negative Supply Voltage (GND)

8

Prog_DI

DI_PD

OTP Programming Input and Data Input for Daisy Chain mode. Internal pull-

down resistor (~74kΩ). Connect to VSS if not used

9

DO

DO_T

Data Output of Synchronous Serial Interface

10 CLK

DI, ST

Clock Input of Synchronous Serial Interface; Schmitt-Trigger input

11 CSn

DI_PU, ST Chip Select, active low; Schmitt-Trigger input, internal pull-up resistor (~50kΩ)

12 PWM

DO

Pulse Width Modulation of approx. 244Hz; 1µs/step (opt. 122Hz; 2µs/step)

13 NC

-

Must be left unconnected

14 NC

-

Must be left unconnected

15

VDD3V3

S

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

3V supply voltage. Do not load externally.

16 VDD5V

S

Positive Supply Voltage, 3.0 to 5.5 V

DO_OD

DO

DI_PD

DI_PU

digital output open drain

digital output

digital input pull-down

digital input pull-up

S

DI

DO_T

ST

supply pin

digital input

digital output /tri-state

Schmitt-Trigger input

6 Electrical Characteristics

6.1 AS5045 Differences to AS5040

All parameters are according to AS5040 datasheet except for the parameters shown below:

Building Block

AS5045

AS5040

Resolution

12bits, 0.088°/step.

10bit, 0.35°/step

Data length

Read: 18bits

(12bits data + 6 bits status)

OTP write: 18 bits

(12bits zero position + 6 bits mode selection)

Read: 16bits

(10bits data + 6 bits status)

OTP write: 16 bits

(10bits zero position + 6 bits mode selection)

Incremental

encoder

Pins 1 and 2

Not used

Pin 3: not used

Pin 4:not used

MagINCn, MagDECn: same feature as

AS5040, additional OTP option for red-

yellow-green magnetic range

Quadrature, step/direction and BLDC motor

commutation modes

Pin 3:incremental output A_LSB_U

Pin 4:incremental output B_DIR_V

MagINCn, MagDECn indicate in-range or

out-of-range magnetic field plus movement

of magnet in z-axis

Pin 6

MODE pin, switch between fast and slow

mode

Pin 6:Index output

Pin 12

Sampling

frequency

PWM output: frequency selectable by OTP:

1µs / step, 4096 steps per revolution,

f=244Hz 2µs/ step, 4096 steps per

revolution, f=122Hz

Selectable by MODE input pin:

2.5kHz, 10kHz

PWM output:

1µs / step, 1024 steps per revolution,

976Hz PWM frequency

Fixed at 10kHz @10bit resolution

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Revision 1.7

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