AOZ6234QI

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The AOZ6234QI is an integrated circuit from Diodes Incorporated and is part of the company’s Analog Products portfolio. It is an Analog Switch/Multiplexer/Demultiplexer, offering four favorable integrated switches, with low on-resistance and high off-isolation - ideal for use in analog signal switching circuits.

The AOZ6234QI has four independent switches which are designed to switch signals in the range of the power supply voltage (VDD-VSS). With an operating voltage of +2.7V to +13.2V and a low power supply current of 30μA (maximum), the AOZ6234QI also has an ultra-fast switching time of 80ns (maximum). On-resistance of the switch is guaranteed to be lower than 1.5Ω (maximum) for a single channel.

The AOZ6234QI has a wealth of key features. It is optimized for single +3.3V power supplies, but can always be used with a dual +10V/-10V power supply with no compensation. Its wideband analog switches are suitable for applications requiring a broad range of frequency response. Additionally, it has an ESD protection of 4kV (Human Body Model) and integral electrostatic discharge protection at the digital input pins further enhances its robustness.

The AOZ6234QI can be used in a variety of applications. A single device can be used to multiplex (MUX) or demultiplex (DEMUX) signals, providing 4-channel I/O. It is suitable for applications where fast channel-to-channel switching is required or where there is a need to multiplex between analog and digital sources. It can be used to switch signals in test and measurement instruments, CCTV systems, audio and video equipment, DC-DC converters, conditioning circuits and frequency generators. It can also be used in power management and energy efficiency systems such as solar energy harvesting.

The internal construction of the AOZ6234QI is shown in the diagram below. It contains four transmission MOSFETs (T1-T4) connected in series between the supply voltage (Vcc) and ground. The MOSFETs each have an input and output terminal and are connected in such a way that when the switch is open, no current will be drawn. The switches are controlled by the logic inputs S1 to S4 and can be opened or closed depending on the logic level applied at the input. The outputs of the four MOSFETs are connected to the Output (Out) terminal.

The AOZ6234QI is suitable for both low-side switching and high-side switching. In low-side switching, the switches are connected between ground and the Output (Out) terminal and the logic levels at the S1-S4 input control the switches. In high-side switching, the switches are connected between Vcc and the Output (Out) terminal and the logic levels at the S1-S4 input control the switches. The switches can be operated in either single-ended or differential mode. In single-ended mode, the switches are operated in either of the two states, a logic ‘1’ or logic ‘0’. In differential mode, the switching can be performed in either direction, either a positive-going or a negative-going signal.

In summary, the AOZ6234QI is an integrated analog switch/multiplexer/demultiplexer device with four independent switches. It has low on-resistance, high off-isolation and ultra-fast switching time, making it ideal for a wide range of analog signal switching applications. It can also be used for low-side and high-side switching, and in either single-ended or differential mode.

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