MD1730 datasheet(1/34 Pages) MICROCHIP

Part #	MD1730

Description	8-Channel Ultra-Low Phase Noise Continuous Waveform Transmitter with Beamformer

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Manufacturer	MICROCHIP [Microchip Technology]

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 2016 Microchip Technology Inc.

DS20005586B-page 1

MD1730

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

2

CLKN

VLL

EN

CLKP

EP

1

3

4

6

7

8

9

37

5

10

GND

MD1730

6x6x0.9 mm 36-lead VQFN*

* Includes Exposed Thermal Pad (EP); see Table 3-1.

VDD

SCK

CSN

SDI

11

15

12 13 14

18

17

16

26

27

25

24

22

21

20

19

23

36 35

31

34 33 32

28

29

30

CW2

CW3

CW0

CW1

VGN

CW4

CW5

CW6

CW7

8-Channel Ultra-Low Phase Noise

Continuous Waveform Transmitter with Beamformer

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