Magnetic Single-Chip Encoder with a current consumption of only a few μA
The Ultra-Low Power Single-Chip Hall Encoder iC-TW11 by iC-Haus allows for an
energy-saving 10-bit angle detection and therefore targets for example battery-buffered
applications. With a sampling rate of 10 Hz an average current consumption of
typically 3 μA is obtained. In standby mode between measuring cycles the idle current
cuts back to approximately 100 nA. In normal operation iC-TW11 supports sampling
rates of 4 kHz with an activated filter and automatic amplifier gain for 10-bit resolution
at maximum accuracy. A measuring cycle can be operated either via the SPI interface
or via a separate trigger input by an external event.
A new position value is being signaled to the micro controller via interrupt. The
4-wire SPI interface can be operated with up to 16 MHz clock frequency. The interrupt
structure allows a daisy chain wiring of multiple iC-TW11. Therefore a controller
can capture multiple rotation axes simultaneously.
Typical applications are:
– Battery-operated dynamic speed measurement in power tools
– Position and motor control in mobile robots or airplanes
– Wireless position measuring with “energy harvesting“ power supply
– Mobile servo motor and stepper motor controls
– Simple 10-bit encoder with adaptive current consumption
– Digital control knob with high resolution and ultra-cap buffering
– Manually adjustable digital potentiometer
– Control knob with pushbutton function through evaluation of the magnetic
field strength
At a voltage supply of 3.3 V (+/- 10 %) iC-TW11 operates in the extended industrial
operating temperature range from -40 to +125 °C. The space requirement of the
single-chip encoder iC is especially low due to the QFN16 package with 4 mm x 4mm.
Further information can be found at http://www.ichaus.com/tw11
