MD1730
8-Channel Ultra-Low Phase Noise
Continuous Waveform Transmitter with Beamformer
Features General Description 8-Channel Ultrasound Continuous Waveform
(CW) Transmitter with Integrated Beamformer CW Output В±1V to В±6Vp-p with Low RON -160 dbc/Hz Ultra-Low Phase Noise at 1 kHz
Offset and 5 MHz 8-Bit Programmable Per-Channel Beamforming
Phase Delay 8-Bit Programmable Dividers for CW Frequency
with Input Clock Frequency up to 250 Mhz Input Clock Compatible with LVDS/SSTL or
Single-Ended LVCMOS LVCMOS 2.5V Logic for the Control I/O pins Fast SPI Interface Supports up to 200 MHz SPI Interface Supports Daisy Chaining and
Broadcasting Mode The MD1730 is an 8-channel ultra-low phase noise CW
transmitter with integrated beamformer. It is designed
for medical ultrasound imaging systems requiring
high-performance CW Doppler mode. The MD1730
has a dedicated signal path designed to minimize
phase noise to the output. In addition, it has a
high-speed SPI interface that enables CW
beamforming features. The outputs of the MD1730 can
swing up to В±6V and each output has a separate
programmable phase delay. Additionally, by
programming the internal frequency divider register,
the MD1730 can output different CW frequencies from
a single clock source. For instance, when the input
clock frequency is 160 MHz and the frequency divider …