MP4864A

– 64-CHANNEL, HIGH-VOLTAGE, SPST ANALOG SWITCH

MP4864A Rev. 1.0

MonolithicPower.com

18

10/20/2021

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2021 MPS. All Rights Reserved.

Figure 16 shows where the MP4864A analog

switches reside in an ultrasound system. A 1:3

multiplexing configuration is depicted as an

example. Multiplexing configurations can range

from 1:2 to 1:8 and higher. 1:8 and higher ratios

have slower image frame rates and/or lower

quality images, which are generally employed for

the lower-end, lower-cost ultrasound market.

The MP4864A can be used in any ratio.

The main advantage of using the MP4864A is to

simplify the transmitter and receiver circuitry.

Without any analog switches, the ultrasound

console requires 192 transmitters and receivers

to drive an ultrasound probe with 192 PZT

elements.

With

analog

switches,

only

64

transmitters and receivers are required. This

reduction saves board space, power, and cost,

as the transmitter and receiver circuitry can be

quite complex. These benefits are especially

important for portable ultrasound systems in

which space, battery life, and weight are all at a

premium.

SWIN-0

PZT-0

SWIN-1

PZT-64

SWIN-2

SWIN-189

SWIN-190

SWIN-191

Tx

Rx

T/R

SW

Tx-0

Tx

Rx

T/R

SW

Tx-63

Ultrasound Probe

Ultrasound Console

192 Coaxial Cables

PZT-63

PZT-128

PZT-127

PZT-191

Figure 16: MP4864A in the Console