TS3A5018 Analog Switch Breakout Board

TS3A5018 Analog Switch Breakout Board provides a versatile solution for digitally routing analog and digital signals using the high-performance Texas Instruments TS3A5018 IC. This breakout board features four independent single-pole, double-throw (SPDT) switches, effectively allowing you to select between two different signal paths under microcontroller control. Consequently, engineers and hobbyists utilize this component for muxing/demuxing analog sensor data, switching between different digital communication buses, or managing power paths in battery-operated devices. The breakout design makes the tiny, surface-mount TS3A5018 accessible for breadboards and custom PCBs, thereby greatly accelerating your prototyping process. Therefore, you can achieve superior signal integrity and high-speed switching performance for complex signal management tasks in your next embedded project.

Key Features:

• Quad SPDT Configuration: The board carries four independent single-pole, double-throw switches, allowing simultaneous routing of four separate signal pairs.
• Wide Supply Range: It operates reliably across a wide single-supply voltage range from 2 V to 5.5 V, making it compatible with both 3.3V and 5V logic systems.
• Low On-State Resistance (R_on): The switch maintains a very low R_on (≈ 1.5 Ω at 5 V), ensuring minimal signal distortion and power loss during switching.
• Break-Before-Make Switching: The IC supports break-before-make operation, thus preventing momentary short circuits when switching signal paths, which protects sensitive electronics.
• High Bandwidth: The switch supports a high bandwidth of ≈ 200 MHz, making it ideal for high-speed digital and high-frequency analog signals.

Technical Specifications:

• Logic Supply Voltage (V_CC): 2 V to 5.5 V
• Signal Voltage Range (V_S): 0 V to V_CC
• On-State Resistance (R_on): Typically 1.5 Ω at V_CC = 5 V
• Off-Isolation: −60 dB at 10 MHz
• Bandwidth: 200 MHz
• Switch Configuration: Quad SPDT (Single-Pole, Double-Throw)
• Control Logic: CMOS/TTL Compatible

Mechanical Specifications:

• Main IC: Texas Instruments TS3A5018
• Board Material: FR4 PCB
• Mounting: Solder pads/headers for through-hole breadboard or PCB mounting.
• Headers: Standard 2.54 mm (0.1 in) pin pitch.

Dimensions:

• Board Length: ≈ 23 mm
• Board Width: ≈ 18 mm
• Board Thickness: 1.6 mm
• Mounting Hole Diameter: ≈ 2.5 mm

Pinout and Wiring:

• VCC: Connect the main power supply (2 V to 5.5 V) for the IC and logic.
• GND: Connect the circuit ground reference.
• A/B (Analog Inputs/Outputs): These pins represent the switched paths. Pin A connects to NO (Normally Open) and Pin B connects to NC (Normally Closed).
• COM (Common): This pin connects to either A or B depending on the state of the control pin (SEL).
• SEL (Select): The digital control input (High/Low) determines whether COM connects to A or B.
• Wiring Note: Each of the four switches (SW1, SW2, SW3, SW4) features its own independent A, B, COM, and SEL pin, consequently requiring four separate control signals.

Datasheet Reference:

• Download TS3A5018 Analog Switch Datasheet

Commonly Used in:

• Data Acquisition Systems (DAQ): Multiplexing multiple low-frequency analog sensor readings to a single Analog-to-Digital Converter (ADC).
• Battery Management: Switching power paths for charging or load distribution in portable devices.
• Embedded Control: Dynamically changing communication bus lines (e.g., swapping TX/RX lines).

Applications:

• Audio/Video Routing: Selecting between different audio or low-bandwidth video inputs.
• Test and Measurement Equipment: Automatically routing test signals and probes to different circuit points.
• Logic Level Shifting: Managing mixed 3.3V and 5V digital signal pathways where direct connection is risky.
• Multi-Sensor Interfaces: For example, designers use the switch to connect one microcontroller pin to several different sensors sequentially.

Equivalent Models:

• Analog Devices ADG708: A functionally similar low-voltage, low R_on multiplexer/switch offering comparable performance.
• NXP CBTL04082: A quad SPDT switch often used in high-speed differential signal switching.
• MAX4716: Another reliable low-voltage quad SPDT analog switch IC.

Package Includes:

• 1 x TS3A5018 Analog Switch Breakout Board