IC-TW11 Datasheet, PDF (2/25 Pages) IC-Haus GmbH – 10-BIT ULTRA LOW POWER MAGNETIC ABSOLUTE ROTARY ENCODER

iC-TW11 10-BIT ULTRA LOW POWER^preliminary
MAGNETIC ABSOLUTE ROTARY ENCODER
Rev B1, Page 2/25
DESCRIPTION
The iC-TW11 is a single-chip magnetic rotary encoder
for low voltage (1.8-3.3 V) and low-power end-of-shaft
applications. It includes three Hall elements, auto-
matic power management features, and offers 10-bit
resolution in a space-saving 4x4 mm QFN package
with 16 pins. Built-in automatic gain control (AGC)
assures optimum analog-to-digital conversion under
all conditions with no setup. A noise filter improves
measurement stability, and can be disabled to reduce
power consumption.
The iC-TW11 supports a maximum conversion rate of
up to 4 kHz (4 000 samples per second) with power
consumption proportional to the conversion rate. Low
power mode reduces the supply current by a factor of
7 while increasing the maximum sampling rate to up
to 20 kHz. Sampling is initiated over the SPI interface
or via a dedicated pin for application versatility.
Communication and control of the iC-TW11 is via
a 4-wire SPI interface and multiple devices can be
chained together for efficient usage. Absolute posi-
tion angle, angle-equivalent sine and cosine values,
and the three raw Hall element voltages can all be
read over the SPI interface allowing both simple and
sophisticated applications to be implemented easily.