Ultra-low-power 10-bit Hall encoder consumes only 3 μA average - Embedded.com

Ultra-low-power 10-bit Hall encoder consumes only 3 μA average

The Ultra-Low Power Single-Chip Hall Encoder iC-TW11 by iC-Haus allows for an energy-saving 10-bit angle detection and targets 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.

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 4 mm. Production volume is available and can be ordered at $4.21 in quantities of 1.000pcs.

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.

The evaluation board iC-TW11 EVAL TW11_1C comes with an USB-interface and GUI-Software for easy testing and configuration of this single-chip encoder iC.

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