New from Texas Instruments is a highly integrated digital-input serialiser, which incorporates eight channels and flexible features to provide high-density signal conditioning in a single, compact device. The SN65HVS882 converts eight digital inputs, ranging from 0 V to 34 V, into a single data stream on SPI interface, which simplifies the design and saves overall board space for industrial automation and test and measurement equipment.
Several serialisers can be cascaded through an integrated SPI port, reducing both the isolation channels and controller pins required for high channel-count input modules. In addition, the internal programmable debounce feature filters out spurious pulses up to 3 ms on noisy switch inputs, eliminating the need for external components or software.
The built-in voltage regulator converts the industrial 10 V to 34 V field voltage to a 5 V level, suitable to power the system’s isolation device or logic controller. The device operates over a wide temperature range of -40°C to 125°C and provides individual outputs that can be connected to LEDs, allowing designers to easily observe the input status. The adjustable input current limit allows the use of a single resistor to set the maximum input current in the range of 200 μA to 5 mA.
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