HV219 Datasheet, PDF(1/8 Page) Supertex, Inc – Low Charge Injection 8-Channel High Voltage Analog Switch

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HV219 Datasheet, PDF (1/8 Pages) Supertex, Inc – Low Charge Injection 8-Channel High Voltage Analog Switch

HHVV221199

Initial Release

Low Charge Injection

8-Channel High Voltage Analog Switch

Features

! HVCMOS technology for high performance

! Very low quiescent power dissipation-10ÂµA

! Output On-resistance typically 11â¦

! Low parasitic capacitance

! DC to 10MHz analog signal frequency

! -60dB typical off-isolation at 5MHz

! CMOS logic circuitry for low power

! Excellent noise immunity

! Serial shift register logic control with latches

! Flexible operating supply voltages

! Surface mount packages

Applications

! Medical Ultrasound Imaging

! Non-Destructive Evaluation

General Description

The Supertex HV219 is a low switch resistance, low charge

injection 8-channel 200V analog switch integrated circuit (IC)

intended primarily for medical ultrasound imaging. The device can

also be used for NDE, non-destructive evaluation applications. The

HV219 is a lower switch resistance, 11ohms versus 22ohms,

version of the Supertex HV20220 device. The lower switch

resistance will help reduce insertion loss. It has the same pin

configuration as that of the Supertex HV20220PJ and the

HV20220FG.

The device is manufactured using Supertexâs HVCMOS (high

voltage CMOS) technology with high voltage bilateral DMOS

structures for the outputs and low voltage CMOS logic for the input

control. The outputs are configured as eight independent single

pole single throw 11 ohms analog switches. The input logic is an 8-

bit serial to parallel shift register followed by an 8-bit parallel latch.

The switch states are determined by the data in the latch. Logic

high will correspond to a closed switch and logic low as an opened

switch.

The HV219 is designed to operate on various combinations of high

voltage supplies. For example the VPP and VNN supplies can be:

+40V/-160V, +100V/-100V, or +160V/-40V. This allows the user to

maximize the signal voltage for uni-polar negative, bi-polar, or uni-

polar positive.

Block Diagram

DIN

CLK

DOUT

A042705

Rev. 2 110504

8 BIT

SHIFT

LATCHE S

LEVEL

S HI FTE RS

O UTP UT

SWITCHES

VDD GND

LE CL

VNN VPP

SW0

SW1

SW2

SW3

SW4

SW5

SW6

SW7

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