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Introduction
This board allows the customer to evaluate the features of the galvanically isolated HI-8400 four channel
discrete sensor IC. Each input has full isolation from the digital domain and from the other sensor inputs.
The HI-8400 logic is powered from a single 3.3V ±5% or 5V ±5% supply voltage. The isolated analog
sensor input is supplied from a 16 to 36VDC supply. Each input channel can be individually configured as
a GND/Open or Supply/Open Sensor type using hardware pins. Sensor thresholds are internally set at
Airbus ABD0100H levels, an SPI port is used to read sensor data. A second board is also included to allow
users to evaluate the daisy chain feature.
Figure 1 – Top View of HI-8400 Evaluation Set Up including Daisy Chain Board
Holt Integrated Circuits
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