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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftmux7462f”>View Datasheet
Texas Instruments TMUX7462F Quad Channel Protector is placed on the front end of a signal path to protect sensitive components downstream from damage caused by overvoltage faults. The four channels independently have an internal switch that is turned off automatically upon an overvoltage fault without the need for external controls. This feature simplifies robust system-level protection designs by removing the requirement for control signals on each channel of the TMUX7462F.
The TI TMUX7462F Quad Channel Protector includes overvoltage protection in powered and powered-off conditions, allowing use in applications where power supply sequencing is not precisely controlled. The switch channels remain in the high impedance state (regardless of switch input conditions) when the TMUX7462F power supplies are floating, grounded, or at a level that is below the undervoltage (UV) threshold.
Suppose the signal level on any Sx pin exceeds the fault supply (VFP or VFN) by a threshold voltage (VT). In that case, the Sx pin impedes high, and an output fault flag is asserted low to indicate a fault condition under normal operation. The drain pin (Dx) is either pulled to the exceeded fault supply voltage or left floating depending on the DR control logic.
The protector operates with dual supplies (±5V to ±22V), a single supply (8V to 44V), or asymmetric supplies. The low and flat on-resistance makes the TMUX7462F an ideal solution for data acquisition applications where excellent linearity and low distortion are critical.
