The "ADG704BRMZ" is a part of Analog Devices, specifically from their portfolio of Analog Switches . It is a 4-channel, low- Power , analog switch designed for use in signal routing applications. Let me provide a detailed explanation of its pin function specifications, circuit principles, and FAQs.
1. Package Type and Pin Count
Package Type: "ADG704BRMZ" typically comes in a QFN (Quad Flat No-lead) package. Pin Count: This part comes with a 16-pin configuration, and here’s a detailed pinout for the 16-pin version.2. Pin Function List:
Pin Number Pin Name Pin Type Pin Description 1 VSS Power Supply Ground pin, connected to the circuit ground. 2 S1 Switch I/O Analog input or output. This pin is one side of the switch. 3 S2 Switch I/O Analog input or output. This pin is the other side of the switch. 4 VDD Power Supply Supply voltage pin, typically +5V or as specified in datasheet. 5 A1 Control Input Digital logic input that controls the switching of the A1-B1 path. 6 A2 Control Input Digital logic input that controls the switching of the A2-B2 path. 7 B1 Switch I/O Analog input or output. This pin is one side of the switch. 8 B2 Switch I/O Analog input or output. This pin is the other side of the switch. 9 NC No Connection Not internally connected to the IC, but may be used for mechanical purposes. 10 NC No Connection Not internally connected to the IC, but may be used for mechanical purposes. 11 GND Ground Ground pin, electrically tied to the device’s ground plane. 12 EN1 Control Input Digital logic input that controls whether the channel 1 (S1-B1) is active. 13 EN2 Control Input Digital logic input that controls whether the channel 2 (S2-B2) is active. 14 INH1 Control Input Inhibit control for channel 1, which can disable the switch. 15 INH2 Control Input Inhibit control for channel 2, which can disable the switch. 16 VDD Power Supply Supply voltage, similar to Pin 4.3. Detailed Pin Function Descriptions
VSS (Pin 1): This is the ground pin, and it's used to complete the electrical circuit. It is the reference for all voltages in the device. S1, S2, B1, B2 (Pins 2, 3, 7, 8): These are the switching channels where the analog signals are passed through when the corresponding control lines are active. VDD (Pins 4 and 16): The supply voltage pins that power the IC, typically +5V or +3.3V, depending on the application. A1, A2 (Pins 5, 6): These are the control pins for the switches, and they determine whether the signal path between the corresponding S and B pins is connected or not. EN1, EN2 (Pins 12, 13): These pins are used to enable or disable the individual channels. A logic "1" enables the channel. INH1, INH2 (Pins 14, 15): These are the inhibit control pins for each switch channel. When driven high, the switch is disabled. NC (Pins 9, 10): No Connection pins, meaning they are not electrically connected internally and can be left floating or used for mechanical purposes. GND (Pin 11): This is the ground connection for the device, required for the IC to function.4. Circuit Principle Overview:
The ADG704BRMZ operates as a low-resistance, low-power analog switch. Each of its four channels is controlled by a combination of digital control pins (A1, A2, EN1, EN2, INH1, INH2), which select the path for analog signals. By enabling the relevant control lines, a signal is allowed to pass through the selected path between S and B pins.
When the corresponding EN pin is active, the signal can flow between the respective S and B pins. In contrast, if the INH pin is high, it disables the channel, preventing the signal flow.
5. 20 Common FAQ for ADG704BRMZ
What is the function of the VSS pin in the ADG704BRMZ? The VSS pin is the ground pin, providing the reference for the device’s signal and power levels. Can I apply a voltage higher than 5V to the VDD pin? No, applying a voltage higher than the recommended 5V can damage the IC. What happens when I drive the INH1 pin high? Driving INH1 high disables the switch in channel 1, blocking the signal from passing between S1 and B1. Is it possible to control multiple switches simultaneously? Yes, you can control multiple channels by driving the corresponding control pins high or low as needed. How do I enable the channels in the ADG704BRMZ? The channels are enabled by driving the EN pins (EN1, EN2) high. What is the maximum current that can pass through the switches? The ADG704BRMZ can handle typical analog signal currents but check the datasheet for exact limits based on supply voltage and temperature. What is the power consumption of the ADG704BRMZ? The device is low power, typically consuming only microamperes when the channels are disabled. How do I connect the ground of my system to the ADG704BRMZ? Connect the GND pin to the ground of your system to ensure proper functionality. Are the NC pins connected internally? No, the NC pins are not connected internally and can be left floating or used for mechanical purposes.What is the logic level required for the control inputs?
The control inputs (A1, A2, EN1, EN2) require logic levels that match the supply voltage (e.g., 3.3V or 5V logic).Can I use the ADG704BRMZ in a bidirectional configuration?
Yes, the device supports bidirectional analog switching.Can the ADG704BRMZ switch digital signals?
While it is designed for analog signals, it can handle digital signals as long as they are within the voltage limits.How do I disable a channel in the ADG704BRMZ?
You can disable a channel by driving the INH pin high.What is the maximum voltage that can be applied to the signal pins (S1, S2, B1, B2)?
Typically, these pins can handle voltages up to VDD, but consult the datasheet for absolute maximum ratings.Can I use the ADG704BRMZ for high-speed signal switching?
It is suitable for typical analog signal switching applications but may not be suitable for high-frequency digital signals.What type of applications is the ADG704BRMZ suitable for?
It is ideal for signal routing, signal conditioning, and analog multiplexing applications.Can I use the ADG704BRMZ in a single-supply configuration?
Yes, the device can operate with a single supply voltage, typically +5V or +3.3V.How do I connect the VDD pin to the supply?
Connect the VDD pin to the positive supply rail, either 5V or 3.3V depending on your design.Is the ADG704BRMZ a logic-level controlled switch?
Yes, the ADG704BRMZ uses logic inputs to control the switching of analog channels.What is the maximum switching time for the ADG704BRMZ?
Switching time is typically in the microsecond range, but please refer to the datasheet for exact values based on supply voltage and load conditions.Let me know if you need additional details or clarification!
