Key Technical Indicators and Design Requirements

　　Signal Integrity: High-frequency signals (such as MIPI and Gigabit Ethernet) require impedance matching (50Ω/100Ω differential) and equal-length differential pair routing to prevent crosstalk.

　　Environmental Adaptability:

　　Operating Temperature and Humidity: Industrial-grade surveillance PCBAs must support -40°C to 85°C (commercial-grade: 0°C to 60°C) and RH 10% to 95% (non-condensing). Wide-temperature components and PCB copper foil are required to enhance heat dissipation.

　　Electromagnetic Compatibility (EMC): Must pass GB/T 17626 (immunity) and EN 55032 (electromagnetic radiation) tests. EMC filter capacitors, ground isolation, and a shielding cover should be incorporated into the design.

　　Stability and Reliability:

　　Power Supply Design: Use a DC-DC step-down chip (such as the MP2359) + an LDO (low-dropout linear regulator) to provide a stable 3.3V/1.8V power supply. Overvoltage, overcurrent, and Short-circuit protection;

　　Lifespan: Key components (such as capacitors and crystal oscillators) are industrial-grade, with an MTBF (mean time between failures) of ≥ 50,000 hours.

　　Low-power design: Targeted at battery-powered wireless surveillance systems (such as outdoor dome cameras), this system supports sleep mode (standby power consumption < 1W) and dynamic frame rate adjustment (reduced to 1fps when no event occurs, resuming to 25fps when an event is triggered).