The **AD8190ACPZ-R7** is a high-performance HDMI/DVI switch with integrated equalization and pre-emphasis, manufactured by Analog Devices. It is primarily used in digital video systems to manage high-speed differential signals. --- ## 1. Core Specifications Below are the primary technical parameters for the AD8190ACPZ-R7: | Parameter | Specification | | :--- | :--- | | **Function** | 2:1 HDMI/DVI Switch | | **Data Rate** | Up to 1.65 Gbps per channel | | **Supported Resolution** | UXGA (1600x1200) / 1080p | | **Supply Voltage** | 3.3V | | **Package** | 56-lead LFCSP (Lead Frame Chip Scale Package) | | **Operating Temperature** | -40°C to +85°C | --- ## 2. Key Electronic Features ### A. Equalization and Pre-emphasis * **Input Equalization:** It compensates for signal loss caused by long HDMI cables (up to 20 meters at 1080p). * **Output Pre-emphasis:** It boosts the signal at the output to maintain integrity when driving long PCB traces or additional cabling. ### B. TMDS Switching The device manages **Transition Minimized Differential Signaling (TMDS)**, which is the core signaling technology for HDMI and DVI. It allows for seamless switching between two video sources to one display. ### C. Auxiliary Signal Support Beyond high-speed video data, the AD8190 handles the lower-speed signals required by the HDMI standard: * **DDC (Display Data Channel):** I2C-compatible switching for EDID communication. * **HPD (Hot Plug Detect):** Logic to notify the source that a display is connected. --- ## 3. Pinout and Integration (Example) The chip is integrated into a system via an I2C control interface or through hardware pins for manual switching. ```c // Pseudo-code conceptualizing I2C control for the AD8190 void select_hdmi_source(int source_id) { if (source_id == 1) { i2c_write(AD8190_ADDR, CONFIG_REG, MASK_SOURCE_A); } else { i2c_write(AD8190_ADDR, CONFIG_REG, MASK_SOURCE_B); } } ``` --- ## 4. Typical Applications * **Digital Televisions (HDTVs):** To provide multiple HDMI input ports. * **AV Receivers:** To switch between Blu-ray players, consoles, and cable boxes. * **Projectors:** High-fidelity signal switching in professional environments. * **HDMI Splitters/Switchers:** Dedicated consumer electronics for port expansion. ---