LM96530 Datasheet | National Semiconductor

Description The LM96530 is an eight-channel monolithic high-voltage, high-speed T/R (Transmit/Receive) switch for multi-channel medical ultrasound applications. It is well-suited for use with National’s LM965XX series chipset which offers a plete medical ultrasound solution targeted towards low-power, portable systems. The LM96530 contains eight high-voltage T/R switches with integrated clamping diodes. This chip protects the inputs of the receive channel's LNA (Low Noise Amplifier) from the high-voltage pulses of the transmit channel. Advanced features include a diode bridge with internal current sources that are programmable via an external resistor. Low-power operation is enabled via per-channel-selectable switching. National Semiconductor also offers a development package for sale which includes a driver hardware and software package with a graphical user interface for configuration and monitoring. PRELIMINARY September 3, 2010 Features - 8-channel high-voltage receive side switches without charge-injection - Can be used for receive protection and/or receive multiplexing with SPI™ patible bus control - Channel bandwidth supports 1MHz to 15MHz transducers - Input accepts pulses and continuous-wave signals within - - - - - Applications - Ultrasound Imaging ±60V Integrated output clamping diodes limit output to ±0.7V Low harmonic distortion HD2 at -75d Bc at 5MHz Continuous-wave operation Up to 15MHz carrier frequency operation Soft-switcher based on a diode bridge architecture yielding better noise performance and faster turn-on and off times than peting T-gate switch architectures - 2.5V to 3.3V CMOS SPI™ patible logic interface with daisy chain capability - Bias current source (IS) can be scaled between 0 and 8m A via an external resistor Key Specifications Input voltage Output voltage clamp ( IS= 1m A) On-resistance Off-isolation @ 5MHz Noise spectral density @ 5MHz Harmonic distortion HD2 HD3 Channel crosstalk @ 5MHz Operating Temp. ±60 ±0.6 16 -58 0.5 V...