3.3-volt 32-channel discrete-to-digital sensing IC for avionics uses offered by Holt
The IC has an SPI interface and low threshold sensing capability. The sense input thresholds and hysteresis are programmable via the 20 MHz SPI port in 100-millivolt steps, from 0.4 to 5.2 volts and 32 sense output states may be read with one SPI command. In addition, the device has built-in lightning protection on the sense inputs.
The 32 sensing channels are divided into four banks of eight inputs, with each bank independently configurable over the SPI port. Users may implement a 32-channel solution using one device, or increase the number of sense channels on one SPI port by addressing several HI-8437 devices by their individual chip selects.
The device is available in an industrial operating temperature range of -40 to 85 degrees Celsius, and an extended-temperature operating range of -55 to 125 C. It also comes in several standard package options, including 44 pin PQFP and compact 7-by-7-millimeter 44-pin QFN. An Evaluation Kit, ADK-8437, also is available from Holt on request.
For more information contact Holt online at www.holtic.com.
