深圳市勤思达科技有限公司

TheAS5040 is a contactless magnetic rotary encoder for

accurate angular measurement over a full turn of 360°. It is a

system-on-chip, combining integrated Hall elements, analog

front end and digital signal processing in a single device.

To measure the angle, only a simple two-pole magnet, rotating

over the center of the chip, is required. The magnet may be

placed above or below the IC.AS5040-ASST

The absolute angle measurement provides instant indication of

the magnet’s angular position with a resolution of 0.35° = 1024

positions per revolution. This digital data is available as a serial

bit stream and as a PWM signal.

Furthermore, a user-programmable incremental output is

available, making the chip suitable for replacement of various

optical encoders.

An internal voltage regulator allows the AS5040 to operate at

either 3.3 V or 5 V supplies.AS5040-ASST

• Office equipment: printers, scanners, copiers

• Replacement of optical encoders

• Front panel rotary switches

• Replacement of potentiometers

Block DiagramAS5040-ASST

AS5040-ASSTThe functional blocks of this device are shown below:

Figure 4:

Pin Configuration SSOP16

Pin Description

Figure 6 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 4).

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