AD8331ARQZ-R7 datasheet(34/56 Pages) AD

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AD8331/AD8332/AD8334

Rev. G | Page 34 of 56

ULTRASOUND TGC APPLICATION

The AD8332 ideally meets the requirements of medical and

industrial ultrasound applications. The TGC amplifier is a key

subsystem in such applications because it provides the means

for echo location of reflected ultrasound energy.

Figure 91 through Figure 93 are schematics of a dual, fully

differential system using the AD8332 and the AD9238 12-bit

high speed ADC with conversion speeds as high as 65 MSPS.

HIGH DENSITY QUAD LAYOUT

The AD8334 is the ideal solution for applications with limited

board space. Figure 94 represents four channels routed to and

away from this very compact quad VGA. Note that none of the

signal paths crosses and that all four channels are spaced apart

to eliminate crosstalk.

In this example, all of the components shown are 0402 size;

however, the same layout is executable at the expense of slightly

more board area. The sketch also assumes that both sides of the

printed circuit board are available for components and that the

bypass and power supply decoupling circuitry is located on the

wiring side of the board.

AD8331ARQZ-R7 데이터시트(PDF) 34 Page - Analog Devices