## AD8147ACPZ-R2: Overview and Technical Specifications The **AD8147ACPZ-R2** is a high-speed, triple differential driver manufactured by Analog Devices. It is specifically designed for transmitting high-resolution video signals (RGB, YPbPr) over long distances using twisted-pair cables (like Cat-5/6). --- ### 1. Key Features The device is optimized for high-performance analog signal distribution. | Feature | Specification | | :--- | :--- | | **Channels** | Triple (3 Channels for R, G, B) | | **Bandwidth (-3 dB)** | 780 MHz | | **Slew Rate** | 2550 V/µs | | **Settling Time** | 5 ns (to 0.1%) | | **Operating Voltage** | +5V to ±5V | | **Package** | 24-Lead LFCSP (4mm x 4mm) | --- ### 2. Functional Description The AD8147 converts single-ended input signals into balanced differential outputs. This is crucial for maintaining signal integrity in noisy environments. * **Common-Mode Control:** It features a dedicated pin for setting the output common-mode voltage, allowing for easy DC-offset adjustment. * **Sync-on-Common-Mode:** This chip includes unique circuitry that allows the horizontal and vertical sync signals to be encoded onto the common-mode levels of the three differential outputs. This eliminates the need for extra wires to carry sync data. * **High Impedance Disable:** The device can be put into a low-power "disabled" state, where the outputs become high-impedance, facilitating bus-sharing or power saving. --- ### 3. Pin Configuration (Key Pins) The 24-lead LFCSP package is compact and requires careful thermal management via the exposed pad. | Pin Name | Function | | :--- | :--- | | **IN_R, IN_G, IN_B** | Single-ended video inputs for Red, Green, and Blue. | | **VOUT+, VOUT-** | Differential output pairs for each channel. | | **VOCM** | Input to set the output common-mode voltage level. | | **Hsync / Vsync** | Logic inputs to encode synchronization signals into the common-mode. | | **EN** | Enable pin (active low/high depending on logic state). | | **Exposed Pad** | Must be soldered to the ground plane for thermal dissipation. | --- ### 4. Typical Applications * **KVM (Keyboard-Video-Mouse) extenders:** Sending video over long distances to remote consoles. * **Digital Signage:** Distributing high-quality analog video in commercial buildings. * **Security Systems:** Transmitting high-resolution surveillance video over UTP (Unshielded Twisted Pair) cables. --- ### 5. Part Number Breakdown * **AD8147:** Base model number. * **ACPZ:** **A** (Industrial Temp Range), **CP** (LFCSP package), **Z** (RoHS compliant). * **R2:** Indicates the reel size (7-inch reel containing 250 units).