Datasheet > MD3872

MD3872

更新时间： 2024-09-15 12:05:59

品牌	Logo	应用领域
超科 - SUPERTEX		转换器模数转换器
页数	文件大小	规格书
24页	1545K
描述
Low Power, Low Noise Ultrasound Receive Front-End Eight-Channels of LNA, VGA, AAF, CPS & 12-Bit, 50MHz ADCs

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MD3872 数据手册

MD3872

Supertex inc.

Low Power, Low Noise Ultrasound Receive Front-End

Eight-Channels of LNA, VGA, AAF, CPS & 12-Bit, 50MHz ADCs

Features

General Description

► 1.8V Analog/Digital supply

The MD3872 is an eight-channel front-end receiver for medical

ultrasound imaging. Its excellent low power dynamic performance

is especially suitable for portable ultrasound applications.

► 3.3V supply for CW Doppler output bias

► Fully differential inputs and outputs

► SPI programmable LNA gain = 14dB/18dB

► LNA input range 480mV_PP/300mV_PP

► Dual mode active input impedance matching

► 1.1nV/√Hz Input Voltage Noise at 5.0MHz

► 1.0pA/√Hz Input Current Noise at 5.0MHz

► 0 to -47dB Linear-in-dB variable Gain of VCA

► 4 PGA Gain settings: 23.5, 29.0, 34.5 & 40.0dB

► Third Order Anti-Aliasing Filter (AAF)

► Program/Auto-tracking AAF (6.6~15MHz)

► Integrated 8×8 Cross-Point Switch (CPS)

► SNR 66dB, SFDR 74dB for ADC

The circuit of each channel is composed of a 14dB/18dB low

noise pre-ampliﬁer (LNA), a voltage- controlled attenuator (VCA

or TGC), a programmable gain ampliﬁer (PGA), an anti-aliasing

ﬁlter (AAF) and an analog-to-digital (ADC) converter. The gain

and gain range of the VGA can be digitally conﬁgured separately.

The gain of the PGA can be set to one of four discrete values:

23.5dB, 29dB, 34.5dB or 40dB. The VCA can be continuously

varied by a control voltage from -47dB to a maximum of 0dB.

In CW mode, an integrated trans-conductance ampliﬁer is driven

by the LNA to generate differential output current. The resulting

signal currents of each channel then connect to an 8×8 differential

cross-point switch which can be programmed through the SPI.

► Built-in reference voltage

► LVDS per ANSI-644

► Fast overload recovery time

► Low power 95mW/ch, 50mW/ch CW

The 12-bit ADC is based on a pipeline structure to provide high

static linearity. The data, clock, and frame alignment signal

outputs are serial LVDS in binary format for each channel.

Applications

► Medical ultrasound imaging

► Portable ultrasound instrumentation

► Transducer signal processing

Block Diagram

CWVDD (+3.3V)

AVDD (+1.8V)

PLL

DVDD (+1.8V)

CLK+

CLK-

FLEX

6 X CLK

CWX+

CWX-

FCLK+

FCLK-

SW1

PA1-

LNA

IN1+

OUT1+

OUT1-

ADC

VGA

AAF

12bits

IN1-

SW2

PA2-

LNA

Data

Ser. &

LVDS

IN2+

IN2-

OUT2+

OUT2-

ADC

12bits

SW8

PA8-

OUT8+

OUT8-

EBC

LNA

IN8+

IN8-

ADC

12bits

VGA

AAF

RBIAS

CSB

CM0-8

SPI

Reference

CW-SW

PDWN

STBY

DGND

CW1-8

TGC GSC

VREF

EXT

REF+ REF-

SCK SDI SDO

Doc.# DSFP-MD3872

B060413

Supertex inc.

www.supertex.com

12 3 4 5 6 7...24

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与MD3872相关器件

型号	品牌	获取价格	描述	数据表
MD3872DB1	SUPERTEX	获取价格	MD3872 Front-End Ultrasound Receiver Demoboard
MD3872HF-G	SUPERTEX	获取价格	Low Power, Low Noise Ultrasound Receive Front-End Eight-Channels of LNA, VGA, AAF, CPS & 1
MD3880	SUPERTEX	获取价格	4-Channel Low-Noise Amplifi er
MD3880B2-G	SUPERTEX	获取价格	4-Channel Low-Noise Amplifi er
MD3910	APITECH	获取价格	Voltage to Frequency Converter, 1 Func, 10MHz, CDIP24, 1.310 X 0.690 X 0.220 INCH, CERAMIC
MD3957	MICROSEMI	获取价格	Rectifier Diode, 1 Element, 1A, Silicon
MD3S	DAESAN	获取价格	CURRENT 0.5 Amperes VOLTAGE 50 to 1000 Volts
MD3S	UNIOHM	获取价格	SINGLE PHASE 0.8 AMP SURFACE MOUNT BRIDGE RECTIFIERS
MD3S	RECTRON	获取价格	SINGLE-PHASE GLASS PASSIVATED MINI SILICON SURFACE MOUNT BRIDGE RECTIFIER (VOLTAGE RANGE 5
MD3S	WILLAS	获取价格	SINGLE-PHASE GLASS PASSIVATED SILICON BRIDGE RECTIFIER

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