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ADG428BP

ADG428BP Description

The ADG428BP from Analog Devices Inc. is a high-performance 8:1 analog multiplexer/demultiplexer designed for precision signal routing in demanding applications. Housed in a 20-pin PLCC package, this IC features a low on-state resistance (Ron) of 100Ω (max) and excellent channel-to-channel matching (ΔRon) of 10Ω, ensuring minimal signal distortion. With dual supply voltage support (±15V) and single-supply operation (12V), it accommodates a wide range of system requirements. Although marked Obsolete, its robust design—including ultra-low leakage current (500pA max) and fast switching (150ns Ton/Toff)—makes it a reliable choice for legacy or specialized systems.

ADG428BP Features

• Low On-Resistance: 100Ω (max) ensures minimal voltage drop.
• High Channel Matching: ΔRon of 10Ω for consistent signal integrity.
• Low Leakage: 500pA max (IS(off)) for precision applications.
• Fast Switching: 150ns Ton/Toff enables rapid signal routing.
• Low Charge Injection: 4pC reduces glitches in sensitive circuits.
• Wide Voltage Range: Supports ±15V dual or 12V single supplies.
• Low Capacitance: 11pF (CS(off))/40pF (CD(off)) minimizes crosstalk.
• 8:1 Configuration: Ideal for multiplexing/demultiplexing analog signals.

ADG428BP Applications

The ADG428BP excels in systems requiring high-accuracy signal switching, such as:

• Test & Measurement Equipment: Precision data acquisition and channel switching.
• Medical Instrumentation: Low-leakage signal routing in diagnostic devices.
• Industrial Automation: Multiplexing sensor inputs in control systems.
• Audio/Video Routing: Low-distortion signal handling in broadcast systems.
• Legacy System Maintenance: Replacing older multiplexers with superior performance.

Conclusion of ADG428BP

The ADG428BP combines low resistance, fast switching, and exceptional channel matching, making it a standout choice for precision analog signal routing. While obsolete, its low leakage, charge injection, and dual-supply flexibility ensure relevance in critical applications. Engineers seeking reliable performance in test, medical, or industrial systems may still find this IC invaluable despite its discontinued status. For modern alternatives, consider newer ADG-series devices with enhanced specs.