Description
The Broadcom® AEAT-9922 is an angular magnetic rotary
sensor that provides accurate angular measurement over a
full 360 degrees of rotation.
It is a sophisticated system that uses integrated Hall sensor
elements with complex analog and digital signal processing
within a single device.
A simple two-pole magnet generates the necessary
magnetic field by rotating it in perpendicular. Wide magnetic
field sensor configurations allow On-Axis (end of shaft) or
Off-Axis (side of shaft) modes in application.
The Broadcom AEAT-9922 is a versatile solution capable of
supporting a broad range of applications with its robust
architecture to measure and deliver both absolute and
incremental signals.
The absolute angle measurement provides an instant
indication of the magnet’s angular position with a selectable
and reprogrammable resolution from 10 bits to 18 bits.
When selected, its positioning data is then represented in its
digital form to be assessed through a standard SSI (parity)
and SPI (with CRC and Parity option) communication
protocol. Where desired, users may also choose to receive
its absolute angle position in PWM-encoded output signals
with initialization and error bits option.
The incremental positions are indicated on ABI and UVW
signals with wide user configurable resolution from 1CPR
and up to 10,000 CPR of ABI signals and pole pairs from
1 to 32 pole pairs (2 to 64 poles) for UVW commutation
signals.

Features
 5V and 3.3V operation
 Programmable 10 bits to 18 bits of absolute resolution
 Flexible Incremental ABI resolution ranging from 1 to
10,000 CPR
 Commutation angle output UVW 1 to 32 pole-pair
 PWM output modes with initialization and error bits
option
 User-programmable zero position, direction, index
width and index position
 Programmable hysteresis
 Absolute output over 2-wire SSI, 3-wire SSI, and 4-wire
SPI. Each available in different mode.
 Compact QFN-24 leads (4 mm × 4 mm) package
 RoHS compliant
 INL angle correction for high accuracy
 Wide operating temperature –40°C to 125°C

Applications
 Brushless DC motor and stepper motor
 Resolver and potentiometer replacement
 Industrial automation and robotics
 Industrial sewing machine and textiles equipment