(SIX:AMS), a leading global designer and manufacturer of high performance
analog ICs for communications, industrial, medical and automotive applications,
today introduced AS5311, the first Hall-effect sensor based linear magnetic
encoder to offer submicron resolution.
This integrated linear Hall encoder can be used as an alternative to optical
encoders. For linear motion sensing, a multi-pole magnetic strip is used and
for rotary motion sensing the magnetic strip is replaced by a multi-pole magnetic
ring. For applications like this, an incremental output with a resolution of
10 bit per pole pair and a travelling speed up to 650mm per second is available.
Using for example a multi-pole magnetic ring with a diameter of 41.7mm, a resolution
of 16 bit (65.536 steps per revolution) can be achieved. In conjunction with
a 2mm pole-pair magnetic strip, the AS5311 provides a 1.95 micrometer resolution
signal at its incremental output and a 488 nanometer resolution signal at its
“austriamicrosystems’ AS5311 together with the magnetic strip are
the only two components required to build a robust submicron-resolution position
feedback system”, says Josef Janisch, Encoder Product Manager at austriamicrosystems.
“This small form factor allows AS5311 to be integrated in autofocus, zoom
and vibration reduction systems in cameras, switching systems in fiber optics
or other micro-positioning applications where tight space is a concern and high
resolution is demanded.”
“The AS5311 is the first linear magnetic encoder with submicron resolution,
based on our successful integrated Hall sensor technology”, says Matjaz
Novak, Director of Marketing Industry & Medical at austriamicrosystems.
"It offers an attractive solution for applications where cost, high precision
and small form factor are the constraints. With the AS5311, we want to offer
a device which will allow system designers to implement position sensing solutions
meeting all these constraints at the same time”.
austriamicrosystems’ encoder chip also provides extended diagnostic features
that constantly monitor the placement of the magnet above the device. These
features allow early detection of mechanical systems failures. In addition,
the device compensates for the adverse effects of unwanted external magnetic
fields thus ensuring additional safety and robustness of the system.
The AS5311 can be operated with either 3.3V or 5V supply voltage and is available
in a 20-lead TSSOP-package. The device is specified for an ambient temperature
range from -40° to +125°C.
For product specific information, to download data sheets or to request free
samples from austriamicrosystems' online shop ICdirect, please visit www.austriamicrosystems.com/Linear-Hall-Encoder/AS5311.