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Interface - Analog Switches, Multiplexers, Demultiplexers

The MAX4532CAP Dual Single-Supply, 2-to-1 Multiplexer/Analog Switches are single-supply, SPST CMOS switches designed for signal multiplexing and analog/digital signal routing applications. The devices operate from a single +2.7 V to +13.2 V supply. The on resistance is extremely low, typically 0.4 Ω, making the devices ideal for low-level signals. The MAX4532CAP also features low off-state leakage current, low input and output capacitance, and excellent channel-to-channel matching.

The MAX4532CAP is available in an 8-pin, thin (1.8 mm) SO package that is used for space-sensitive applications. The MAX4532CAP is designed to behave as a single-pole double-throw (SPDT) switch when two parts are put together side by side. The MAX4532CAP has fast switching speeds and low logic-level thresholds on the digital inputs, allowing direct interfacing to logic.

Applications

• Sample-and-hold amplifiers
• Battery-operated systems
• Mobile communications
• Audio and video equipment
• Computer peripherals
• High-fidelity audio
• Portable instrumentation
• Test and measurement equipment

Key Features

• Single +2.7 V to +13.2 V supply
• Low On Resistance: 0.4 Ω max
• Low Off Leakage Current: 0.15 nA max
• Low Input and Output Capacitance: 2.5 pF max
• Excellent Channel-to-Channel Matching: 0.08 dB max
• Operometers: 10-kΩ Pullup and Pulldown
• Open-Drain Control Output
• Fast Switching: 0.7 ns TYP
• Power-Saving Shutdown

Description ( Working Principle )

The MAX4532CAP dual single-supply, 2-to-1 multiplexer/analog switches is an 8-pin full CMOS switch designed to switch both analog and digital signals with a single +2.7 V to +13.2 V supply.

The switch is designed to operate with very low on-state resistance (0.4 Ω and 0.45 Ω max flat/tapered), low off-state leakage current, and fast switching times in the range of 0.7 ns. The input and output capacitance of the MAX4532CAP is 2.5 pF max, making it suitable for high-resolution and wide bandwidth applications.

The switch is designed for single-ended and differential analog signals in the range of ±50 mV to ±3.375 V. It features 10-kΩ pullup and pulldown operometers, so that the current draw from the power supply is reduced. The MAX4532CAP also features an open-drain control output and a power-saving shutdown control.

In addition, the MAX4532CAP can be used as a 1-to-2 multiplexer by connecting both analog and digital inputs to the same control pin, allowing for two selectable signals. The on resistance of the switch is matched within 0.08 dB, making it ideal for stereo audio applications.

Conclusion

The MAX4532CAP dual single-supply, 2-to-1 multiplexer/analog switches provide low on-state resistance and low off-state leakage current, making it ideal for low-level signal routing applications. The devices feature low input and output capacitance, fast switching speeds, and excellent channel-to-channel matching. The MAX4532CAP is a versatile switch that can be used as a 1-to-2 multiplexer, as well as a SPDT switch. The devices are available in a thin 8-pin SO package and are ideal for space-sensitive applications.

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