Texas Instruments TMUX721x CMOS Switches
Texas Instruments TMUX721x CMOS Switches are complementary metal-oxide semiconductor (CMOS) switches with four independently selectable 1:1, single-pole, single-throw (SPST) switch channels. The devices work with a single supply (4.5V to 44V), dual supplies (±4.5V to ±22V), or asymmetric supplies (such as VDD = 12V, VSS = –5V). The TMUX721x supports bidirectional analog and digital signals on the source (Sx) and drain (Dx) pins ranging from VSS to VDD.
The switches of the Texas Instruments TMUX721x are controlled with appropriate logic control inputs on the SELx pins. The TMUX721x are part of the precision switches and multiplexers family of devices and have very low on and off leakage currents allowing them to be used in high precision measurement applications.
The TMUX72xx family provides latch-up immunity, preventing undesirable high current events between parasitic structures within the device typically caused by overvoltage events. A latch-up condition typically continues until the power supply rails are turned off and can lead to device failure. The latch-up immunity feature allows the TMUX72xx family of switches and multiplexers to be used in harsh environments.
Features
- Latch-up immune
- ±4.5V to ±22V dual supply range
- 4.5V to 44V single supply range
- 2Ω low on-resistance
- 370mA (max) high current support
- –40°C to +125°C operating temperature
- 1.8V logic compatible
- Fail-safe logic
- Rail-to-rail operation
- Bidirectional operation
Applications
- Sample-and-hold circuits
- Feedback gain switching
- Signal isolation
- Field transmitters
- Programmable Logic Controllers (PLC)
- Factory automation and control
- Ultrasound scanners
- Patient monitoring and diagnostics
- Electrocardiogram (ECG)
- Data Acquisition Systems (DAQ)
- Semiconductor test equipment
- LCD test
- Instrumentation - Lab, Analytical, Portable
- Ultrasonic smart meters (water and gas)
- Optical networking
- Optical test equipment
Functional Block Diagrams
Related Development Tool
Texas Instruments TMUX721xEVM Switch Evaluation Module (EVM)
Supports the evaluation of the TMUX721x devices in the 16-pin TSSOP (PW) package.