The component you're referring to, the ADG708BRUZ, is a part from Analog Devices (AD). This part is a multiplexed analog switch designed for a variety of signal routing applications in both consumer and industrial electronics. It has multiple pins for signal input/output, control logic, and supply pins. I'll provide an in-depth breakdown of the pin functions, the packaging details, and a FAQ on the usage of the part.
Packaging and Pin Functions:
The ADG708BRUZ comes in a QFN-20 package. The package has 20 pins, and each pin has a specific function for signal routing, powering the device, and controlling the operation of the switch matrix. Below is a detailed explanation of the pin functions.
Pin Functions Table (QFN-20 Package): Pin Number Pin Name Pin Function Description 1 IN1A Input A of channel 1, connects the signal to be switched. 2 IN1B Input B of channel 1, connects the signal to be switched. 3 IN2A Input A of channel 2, connects the signal to be switched. 4 IN2B Input B of channel 2, connects the signal to be switched. 5 IN3A Input A of channel 3, connects the signal to be switched. 6 IN3B Input B of channel 3, connects the signal to be switched. 7 IN4A Input A of channel 4, connects the signal to be switched. 8 IN4B Input B of channel 4, connects the signal to be switched. 9 VDD Positive supply voltage for the device. 10 IN5A Input A of channel 5, connects the signal to be switched. 11 IN5B Input B of channel 5, connects the signal to be switched. 12 IN6A Input A of channel 6, connects the signal to be switched. 13 IN6B Input B of channel 6, connects the signal to be switched. 14 IN7A Input A of channel 7, connects the signal to be switched. 15 IN7B Input B of channel 7, connects the signal to be switched. 16 IN8A Input A of channel 8, connects the signal to be switched. 17 IN8B Input B of channel 8, connects the signal to be switched. 18 GND Ground pin, used for the reference ground of the circuit. 19 S1 Logic control pin 1. Used for switching channels on/off. 20 S2 Logic control pin 2. Used for switching channels on/off.Circuit Principle:
The ADG708BRUZ is an analog switch matrix that can switch multiple input signals to various outputs, controlled by digital signals sent to the S1 and S2 pins. The switch configuration allows routing of multiple signals, with the inputs on pins 1-16 connected to either side of the switch channels. The VDD pin powers the switch, while the GND pin serves as the reference ground.
The S1 and S2 pins control which channels are open, meaning which of the input signals are connected to the output path. Depending on the logic states applied to the S1 and S2 pins, the signals from input pins (IN1A, IN1B, etc.) are routed to the outputs.
FAQ: Common Questions about ADG708BRUZ
Q: What is the supply voltage for the ADG708BRUZ? A: The supply voltage (VDD) for the ADG708BRUZ should be in the range of 2.7V to 12V.
Q: How many control pins does the ADG708BRUZ have? A: The ADG708BRUZ has two control pins: S1 and S2.
Q: Can the ADG708BRUZ switch both analog and digital signals? A: Yes, the ADG708BRUZ can switch both analog and digital signals depending on the application.
Q: What is the maximum input voltage for the pins? A: The maximum input voltage on the pins is typically VDD + 0.3V.
Q: What is the typical input resistance for the channels? A: The typical on-resistance is 20Ω, but this can vary depending on the supply voltage and operating conditions.
Q: What is the maximum current rating for the input channels? A: The maximum input current for each channel is typically ±100mA.
Q: What is the capacitance of the switch in the off state? A: The off-state capacitance is typically 3pF.
Q: How is the ADG708BRUZ controlled? A: The device is controlled by logic signals applied to the S1 and S2 pins to switch the channels on/off.
Q: Can the ADG708BRUZ be used for both high and low-speed switching? A: Yes, the ADG708BRUZ is suitable for both high-speed and low-speed switching applications.
Q: What is the output capacitance of the device? A: The typical output capacitance is 3pF in the off state.
Q: What is the power consumption of the ADG708BRUZ? A: The power consumption depends on the supply voltage but typically is very low, on the order of a few milliwatts.
Q: Can the ADG708BRUZ be used in differential signaling? A: Yes, the ADG708BRUZ can be used in differential signaling applications.
Q: What are the switching characteristics of the ADG708BRUZ? A: The propagation delay is typically 15ns, and the switching time is very fast, around 25ns.
Q: Can the ADG708BRUZ handle negative voltages? A: The device should not be exposed to negative voltages, and reverse voltage on the pins should be avoided.
Q: What is the temperature range of the ADG708BRUZ? A: The operational temperature range is -40°C to +85°C.
Q: How does the ADG708BRUZ handle power-up sequencing? A: Proper power-up sequencing is important to avoid damage. Typically, VDD should be applied first, followed by logic signals on S1 and S2.
Q: What is the maximum frequency of operation for the ADG708BRUZ? A: The ADG708BRUZ can operate at frequencies up to 100MHz for high-speed switching.
Q: How does the ADG708BRUZ handle ESD protection? A: The device has built-in ESD protection on all pins to prevent damage from electrostatic discharges.
Q: What are the main differences between the ADG708BRUZ and other multiplexers? A: The ADG708BRUZ is specifically designed for low resistance and low capacitance switching, making it ideal for analog and mixed-signal applications.
Q: What are the key features of the ADG708BRUZ? A: The key features include low RON, low capacitance, wide supply range, and fast switching.
This detailed explanation and FAQ should give you a comprehensive understanding of the ADG708BRUZ, its pin functions, and its specifications. Feel free to ask for any further details!