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Microchip - 8-Channel Ultra-Low Phase Noise Continuous Waveform Transmitter

Numéro de référence MD1730
Description 8-Channel Ultra-Low Phase Noise Continuous Waveform Transmitter
Fabricant Microchip 
Logo Microchip 





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MD1730 fiche technique
MD1730
8-Channel Ultra-Low Phase Noise
Continuous Waveform Transmitter with Beamformer
Features
• 8-Channel Ultrasound Continuous Waveform
(CW) Transmitter with Integrated Beamformer
• CW Output ±1V to ±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
Applications
• Medical Ultrasound Imaging System for
Cardiovascular Application
• Ultrasound Fetal Heart Monitoring Device
• Ultrasound Flow Meter
• Programmable Array Pattern Generator
General Description
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 ±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
is set to 16, an output CW frequency of 5 MHz can be
obtained with a phase delay step size of 6.25 ns, which
translates to an angular resolution of 11.25 degrees.
Package Type
MD1730
6x6x0.9 mm 36-lead VQFN*
36 35 34 33 32 31 30 29 28
EN 1
27 CW0
CLKP 2
CLKN 3
VLL 4
GND 5
VDD 6
SCK 7
26 CW1
25 CW2
EP 24 CW3
37 23 VGN
22 CW4
21 CW5
CSN 8
20 CW6
SDI 9
19 CW7
10 11 12 13 14 15 16 17 18
* Includes Exposed Thermal Pad (EP); see Table 3-1.
2016 Microchip Technology Inc.
DS20005586B-page 1

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