Addressing designers’ needs to build smaller portable ultrasound systems while speeding time to market, the eight-channel TX810 transmit/receive (T/R) switch integrates a protection diode bridge and clamp diodes for each of its eight channels to prevent the high-voltage pulses of the transmitter from damaging the receive electronics of the ultrasound system.
The part contains a 3-bit interface used to program bias current from 7 mA to 0 mA for different performance and power requirements. When the TX810 bias current is set as 0 mA, the device is configured in power-down mode. In the high-impedance mode, the part does not add load to high-voltage transmitters. Housed in a 36-pin QFN package, the part accepts 200-Vp-p input signals and offers a wake up time of less than 1 µs. ($6 ea/1,000 — prod qty, Dec. 2009.)
Texas Instruments , Dallas , TX
Product Information Center 800-477-8924
http://www.ti.com
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