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ADG221KN

ADG221KN Description

The ADG221KN from Analog Devices Inc. is a high-performance, 4-channel SPST (Single-Pole Single-Throw) analog switch designed for precision signal routing in demanding applications. Housed in a 16-pin DIP (Dual Inline Package), this obsolete but robust IC operates with ±15V dual or +15V single supply voltages, making it suitable for legacy systems requiring reliable switching solutions. With a low on-state resistance (Ron) of 90Ω (max) and minimal channel-to-channel matching (ΔRon) of 4.5Ω, it ensures consistent signal integrity across multiple channels.

ADG221KN Features

• Low Leakage Current: 2nA (max) ensures minimal signal distortion in high-impedance circuits.
• Fast Switching: Turn-on/turn-off times of 350ns/250ns (max) enable rapid signal routing.
• Low Charge Injection: 20pC reduces glitches during switching, critical for precision applications.
• Low Capacitance: 5pF (off-state) minimizes crosstalk and signal attenuation.
• Wide Supply Range: Supports ±15V dual or +15V single supplies for flexible integration.
• Matched Channels: Tight ΔRon (4.5Ω) ensures uniform performance across all switches.

ADG221KN Applications

• Test & Measurement Equipment: Ideal for automated test systems requiring low-error signal switching.
• Data Acquisition Systems: Ensures accurate multiplexing of sensor signals with minimal interference.
• Audio/Video Routing: Low distortion and fast switching suit professional AV systems.
• Industrial Control Systems: Reliable performance in harsh environments due to robust through-hole packaging.
• Legacy System Maintenance: A dependable choice for repairing or upgrading older electronics.

Conclusion of ADG221KN

The ADG221KN stands out for its low Ron, matched channels, and fast switching, making it a preferred choice for precision analog signal routing. While obsolete, its through-hole package and robust specs ensure longevity in critical applications. Engineers seeking low-noise, high-accuracy switching in industrial, test, or legacy systems will find this IC a reliable solution. For modern designs, consider newer alternatives, but the ADG221KN remains a proven performer in its niche.