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How to Use MUX ADG708: Examples, Pinouts, and Specs

Image of MUX ADG708
Cirkit Designer LogoDesign with MUX ADG708 in Cirkit Designer

Introduction

The ADG708 is a low on-resistance, dual 4-channel multiplexer/demultiplexer manufactured by Analog Devices. It is designed for switching analog signals with minimal distortion and high-speed operation. The device is ideal for applications requiring precise signal routing, such as audio, video, and data communication systems. Its low on-resistance and high linearity make it suitable for high-performance analog signal processing.

Explore Projects Built with MUX ADG708

Use Cirkit Designer to design, explore, and prototype these projects online. Some projects support real-time simulation. Click "Open Project" to start designing instantly!
Bus Servo Controlled Robotic System with Power Module
Image of servo : A project utilizing MUX ADG708 in a practical application
This circuit controls multiple high-torque bus servos using a bus servo adaptor, which is powered by a 6-channel power module. The servos receive their control signals and power through the adaptor, enabling synchronized movement for applications requiring precise and powerful actuation.
Cirkit Designer LogoOpen Project in Cirkit Designer
Cellular-Enabled IoT Device with Real-Time Clock and Power Management
Image of LRCM PHASE 2 BASIC: A project utilizing MUX ADG708 in a practical application
This circuit features a LilyGo-SIM7000G module for cellular communication and GPS functionality, interfaced with an RTC DS3231 for real-time clock capabilities. It includes voltage sensing through two voltage sensor modules, and uses an 8-channel opto-coupler for isolating different parts of the circuit. Power management is handled by a buck converter connected to a DC power source and batteries, with a fuse for protection and a rocker switch for on/off control. Additionally, there's an LED for indication purposes.
Cirkit Designer LogoOpen Project in Cirkit Designer
Multi-Channel Load Cell Measurement System with JYS60 Amplifiers and DAQ Integration
Image of Load Cell Circuit: A project utilizing MUX ADG708 in a practical application
This is a multi-channel load cell measurement system with several JYS60 amplifiers connected to load cells for weight or force sensing. The amplified signals are directed to a DAQ system for data capture, and power is supplied through a barrel jack. Grounding is achieved via an AdaGator Side Black component.
Cirkit Designer LogoOpen Project in Cirkit Designer
Logic Gate Circuit with 7408 AND and 7432 OR ICs
Image of gate: A project utilizing MUX ADG708 in a practical application
This circuit includes a 7408 AND gate IC and a 7432 OR gate IC, both powered by a common VCC and GND connection. The circuit is designed to perform basic logical operations, combining AND and OR gates for digital signal processing.
Cirkit Designer LogoOpen Project in Cirkit Designer

Explore Projects Built with MUX ADG708

Use Cirkit Designer to design, explore, and prototype these projects online. Some projects support real-time simulation. Click "Open Project" to start designing instantly!
Image of servo : A project utilizing MUX ADG708 in a practical application
Bus Servo Controlled Robotic System with Power Module
This circuit controls multiple high-torque bus servos using a bus servo adaptor, which is powered by a 6-channel power module. The servos receive their control signals and power through the adaptor, enabling synchronized movement for applications requiring precise and powerful actuation.
Cirkit Designer LogoOpen Project in Cirkit Designer
Image of LRCM PHASE 2 BASIC: A project utilizing MUX ADG708 in a practical application
Cellular-Enabled IoT Device with Real-Time Clock and Power Management
This circuit features a LilyGo-SIM7000G module for cellular communication and GPS functionality, interfaced with an RTC DS3231 for real-time clock capabilities. It includes voltage sensing through two voltage sensor modules, and uses an 8-channel opto-coupler for isolating different parts of the circuit. Power management is handled by a buck converter connected to a DC power source and batteries, with a fuse for protection and a rocker switch for on/off control. Additionally, there's an LED for indication purposes.
Cirkit Designer LogoOpen Project in Cirkit Designer
Image of Load Cell Circuit: A project utilizing MUX ADG708 in a practical application
Multi-Channel Load Cell Measurement System with JYS60 Amplifiers and DAQ Integration
This is a multi-channel load cell measurement system with several JYS60 amplifiers connected to load cells for weight or force sensing. The amplified signals are directed to a DAQ system for data capture, and power is supplied through a barrel jack. Grounding is achieved via an AdaGator Side Black component.
Cirkit Designer LogoOpen Project in Cirkit Designer
Image of gate: A project utilizing MUX ADG708 in a practical application
Logic Gate Circuit with 7408 AND and 7432 OR ICs
This circuit includes a 7408 AND gate IC and a 7432 OR gate IC, both powered by a common VCC and GND connection. The circuit is designed to perform basic logical operations, combining AND and OR gates for digital signal processing.
Cirkit Designer LogoOpen Project in Cirkit Designer

Common Applications

  • Audio and video signal routing
  • Data acquisition systems
  • Communication systems
  • Test and measurement equipment
  • Industrial control systems

Technical Specifications

Key Technical Details

  • Supply Voltage (VDD): 2.7 V to 5.5 V
  • On-Resistance (RON): 2.5 Ω (typical at 5 V)
  • On-Resistance Flatness: 0.5 Ω (typical at 5 V)
  • Switching Time: 20 ns (typical at 5 V)
  • Bandwidth: 200 MHz
  • Power Consumption: 0.01 µW (typical in standby mode)
  • Operating Temperature Range: -40°C to +85°C
  • ESD Protection: 2 kV (HBM)

Pin Configuration and Descriptions

The ADG708 is available in a 16-lead TSSOP or LFCSP package. Below is the pin configuration and description:

Pin Number Pin Name Description
1 S1A Source 1 for channel A
2 S2A Source 2 for channel A
3 S3A Source 3 for channel A
4 S4A Source 4 for channel A
5 D1 Drain for channel A
6 VSS Ground (0 V reference)
7 IN1 Logic control input for channel selection
8 IN2 Logic control input for channel selection
9 EN Enable pin (active low)
10 VDD Positive supply voltage
11 D2 Drain for channel B
12 S4B Source 4 for channel B
13 S3B Source 3 for channel B
14 S2B Source 2 for channel B
15 S1B Source 1 for channel B
16 NC No connection

Usage Instructions

How to Use the ADG708 in a Circuit

  1. Power Supply:

    • Connect the VDD pin to a power supply within the range of 2.7 V to 5.5 V.
    • Connect the VSS pin to ground (0 V reference).
  2. Channel Selection:

    • Use the IN1 and IN2 pins to select the active channel. The logic levels are as follows:
      • IN1 = 0, IN2 = 0: Channel 1 selected
      • IN1 = 0, IN2 = 1: Channel 2 selected
      • IN1 = 1, IN2 = 0: Channel 3 selected
      • IN1 = 1, IN2 = 1: Channel 4 selected
  3. Enable/Disable:

    • The EN pin is active low. Pull it low to enable the multiplexer. Pull it high to disable all channels.
  4. Signal Routing:

    • Connect the analog signals to the S1A–S4A or S1B–S4B pins.
    • The selected signal will be routed to the corresponding drain pin (D1 or D2).
  5. Decoupling Capacitor:

    • Place a 0.1 µF decoupling capacitor close to the VDD pin to reduce noise and improve stability.

Example: Connecting the ADG708 to an Arduino UNO

The ADG708 can be controlled using an Arduino UNO to select channels and route signals. Below is an example code snippet:

// Define control pins for ADG708
const int IN1 = 2;  // Connect to Arduino digital pin 2
const int IN2 = 3;  // Connect to Arduino digital pin 3
const int EN = 4;   // Connect to Arduino digital pin 4

void setup() {
  // Set control pins as outputs
  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);
  pinMode(EN, OUTPUT);

  // Enable the ADG708
  digitalWrite(EN, LOW);  // Active low enable
}

void loop() {
  // Select Channel 1
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, LOW);
  delay(1000);  // Wait for 1 second

  // Select Channel 2
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, HIGH);
  delay(1000);  // Wait for 1 second

  // Select Channel 3
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
  delay(1000);  // Wait for 1 second

  // Select Channel 4
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, HIGH);
  delay(1000);  // Wait for 1 second
}

Important Considerations

  • Ensure the input signals are within the supply voltage range to avoid damage.
  • Use proper decoupling capacitors to minimize noise.
  • Avoid leaving unused pins floating; connect them to ground or a defined logic level.

Troubleshooting and FAQs

Common Issues and Solutions

  1. No Signal Output:

    • Verify that the EN pin is pulled low to enable the device.
    • Check the logic levels on IN1 and IN2 to ensure the correct channel is selected.
  2. High Signal Distortion:

    • Ensure the input signal amplitude is within the specified range.
    • Check for proper grounding and minimize noise in the circuit.
  3. Device Overheating:

    • Verify that the supply voltage does not exceed 5.5 V.
    • Ensure the load connected to the drain pins does not exceed the current rating.
  4. Unexpected Behavior:

    • Check for loose connections or soldering issues.
    • Confirm that unused pins are not left floating.

FAQs

Q: Can the ADG708 handle digital signals?
A: Yes, the ADG708 can switch both analog and digital signals, provided they are within the supply voltage range.

Q: What is the maximum signal frequency the ADG708 can handle?
A: The ADG708 has a bandwidth of 200 MHz, making it suitable for high-frequency signals.

Q: Can I use the ADG708 with a 3.3 V microcontroller?
A: Yes, the ADG708 operates with supply voltages as low as 2.7 V, making it compatible with 3.3 V systems.

Q: How do I reduce crosstalk between channels?
A: Use proper PCB layout techniques, such as separating signal traces and using ground planes, to minimize crosstalk.