The **ADG779BKS-R2** is a high-performance, monolithic CMOS SPDT (Single Pole, Double Throw) switch manufactured by Analog Devices. It is designed for low-voltage applications where low "on" resistance and fast switching speeds are critical. --- ### ## Technical Specifications The following table highlights the primary electrical characteristics of the ADG779BKS-R2: | Parameter | Specification | | :--- | :--- | | **Switch Configuration** | SPDT (1:2) | | **Supply Voltage (VDD)** | 1.8 V to 5.5 V | | **On Resistance (R_ON)** | 2.5 Ω (Typical at 5V) | | **On Resistance Flatness** | 0.5 Ω | | **-3 dB Bandwidth** | 200 MHz | | **Switching Time (t_ON / t_OFF)** | 7 ns / 3 ns | | **Package Type** | 6-lead SC70 | | **Operating Temperature** | -40°C to +125°C | --- ### ## Key Features and Internal Parts The ADG779 logic is designed to be **TTL/CMOS compatible**, meaning it can interface directly with microcontrollers. 1. **CMOS Construction:** The device uses a submicron process that provides low power dissipation yet high switching speed and low resistance. 2. **Break-Before-Make Action:** The internal circuitry ensures that the current connection is broken before the new connection is established, preventing momentary short circuits between the two input pins. 3. **Rail-to-Rail Operation:** The switch can handle analog signals that extend all the way to the power supply rails (0V to VDD). --- ### ## Pin Configuration The ADG779BKS-R2 comes in a tiny 6-lead SC70 package, making it ideal for space-constrained electronics. | Pin No. | Name | Description | | :--- | :--- | :--- | | 1 | **D** | Drain Terminal (Common) | | 2 | **S1** | Source Terminal 1 | | 3 | **GND** | Ground (0 V) | | 4 | **S2** | Source Terminal 2 | | 5 | **VDD** | Positive Power Supply | | 6 | **IN** | Logic Control Input | --- ### ## Common Applications * **Mobile Phones/PDAs:** Switching audio or data signals. * **Battery-Powered Systems:** Low power consumption (typically < 0.01 µA) extends battery life. * **Communication Systems:** High bandwidth allows for video and high-speed data routing. * **Sample-and-Hold Circuits:** Due to low charge injection and fast switching.