Description:The PS9817A-1 and PS9817A-2 are active-low type high-speed photocouplers that use a GaAlAs light-emitting diode on the input side and a photodetector IC that includes a photodiode and a signal processor on the same chip on the output side. The PS9817A-1 and PS9817A-2 are designed specifically for high common mode transient immunity (CMR) and low pulse width distortion. The PS9817A-2 is suitable for high density applications.
A 4-layer PCB with a dedicated ground plane and thermal vias is recommended. Ensure a minimum of 1 oz copper thickness and a 1.6 mm PCB thickness for optimal thermal performance.
Implement a robust power-on reset circuit, ensure a stable power supply, and consider using a thermistor or thermocouple to monitor temperature. Also, follow the recommended operating conditions and derating guidelines.
Use a shielded enclosure, ensure proper grounding, and follow good PCB layout practices. Implement EMI filters and shielding on I/O lines, and consider using a common-mode choke for differential signals.
Use the device's low-power modes, optimize the clock frequency, and minimize unnecessary peripheral usage. Consider using a power gating technique and optimizing the system's power budget.
Perform environmental stress testing (EST), including temperature cycling, humidity, and vibration tests. Also, conduct functional testing, including boundary scan and JTAG testing, to ensure device reliability.
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PS9817A-2-F3-AX Overview
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