ADG202A Analog Switch IC SMD Package

The ADG202A is a quad SPST (Single-Pole, Single-Throw) analog switch IC designed by Analog Devices for precision analog and digital signal switching. It provides low on-resistance, high-speed performance, and wide signal-handling capability, making it ideal for both analog and digital multiplexing applications.

Each of the four switches can independently conduct signals in either direction when activated, allowing for flexible routing of analog or digital signals up to the supply voltage range. The ADG202A operates with ±15V dual supplies or a single supply up to +30V, and supports TTL/CMOS logic compatibility, ensuring easy interfacing with microcontrollers and digital systems.

Its high off-isolation, low leakage, and excellent linearity make it perfect for data acquisition systems, sample-and-hold circuits, instrumentation, and audio/video signal routing.

Available in a compact SMD package (SOIC-16), the ADG202A offers a robust, space-saving, and reliable solution for precision analog switching tasks.

Key Features:

• Four independent SPST analog switches (normally open)
•  Low ON resistance: typically 35 ?
•  Wide analog signal range: ±15 V or 0–30 V
•  Low charge injection: < 20 pC (typical)
•  Low power dissipation: < 1 µW (typical)
•  TTL/CMOS logic compatible control inputs
•  High off-isolation: –80 dB at 1 MHz
•  Break-before-make switching action
•  Fast switching time: typically 150 ns
•  Low leakage current: < 1 nA (typical at 25°C)
•  Compact 16-pin SMD (SOIC) package

Typical Application Circuit:

• Use in analog multiplexers or data acquisition front-ends where multiple analog inputs are switched into an ADC.
• Suitable for audio routing, test instrumentation, or signal calibration systems.
• Can also serve as a digital control switch to connect or isolate signals under microcontroller control.

Applications:

• Analog and digital signal routing/multiplexing
• Audio/video signal switching systems
• Sample-and-hold circuits
• Data acquisition systems
• Automatic test equipment (ATE)
• Instrumentation and control systems
• Programmable gain amplifiers (PGA)
• Communication systems
• Industrial sensor interface circuits