The **AD8189ARUZ-R7** is a high-speed, 2-to-1 differential video multiplexer (mux) developed by Analog Devices. It is specifically designed for high-resolution video applications, offering high bandwidth and excellent switching speeds. --- ### ## Technical Specifications The following table summarizes the key electronic characteristics of the AD8189ARUZ-R7: | Parameter | Specification | | :--- | :--- | | **Function** | 2:1 Differential Video Multiplexer | | **Bandwidth (-3 dB)** | 350 MHz | | **Slew Rate** | 1000 V/µs | | **Differential Gain Error** | 0.02% | | **Differential Phase Error** | 0.02° | | **Supply Voltage Range** | ±4.5V to ±5.5V | | **Package Type** | TSSOP-24 (Thin Shrink Small Outline) | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ### ## Key Electronic Features 1. **High-Speed Performance**: With a bandwidth of **350 MHz**, it is capable of handling high-resolution signals (such as UXGA or component HD video) without significant signal degradation. 2. **Low Distortion**: The extremely low differential gain and phase errors ensure that the color and brightness information in video signals remains accurate during the switching process. 3. **Internal Gain**: It features a fixed gain of 2 (6 dB) to compensate for cable termination losses, ensuring the output signal matches the input amplitude after passing through a 75Ω load. 4. **Fast Switching**: The "R7" suffix indicates the device is provided in a 7-inch reel format, and electronically, the mux features a fast switching time (approx. 10 ns), minimizing visual glitches during input transitions. 5. **Differential Inputs/Outputs**: Unlike standard single-ended muxes, the AD8189 handles differential signals, which provides superior noise immunity over long cable runs. --- ### ## Typical Application Circuitry In a standard circuit, the AD8189 is used to select between two different video sources. Below is a conceptual representation of the pin-out functions: * **Logic Pins (SEL)**: A TTL/CMOS compatible pin used to select between Input 1 and Input 2. * **Differential Inputs**: Two sets of positive and negative inputs (IN1+, IN1- and IN2+, IN2-). * **Termination**: Typically requires 75Ω or 100Ω resistors depending on whether it is used for composite or twisted-pair video. ```python # Conceptual Pin Logic for AD8189 if SEL == 0: Output = Input_Set_A # High-speed path A active else: Output = Input_Set_B # High-speed path B active ```