1

Low Charge Injection 8-Channel High Voltage

Analog Switch with Bleed Resistors

Features

❏

❏

Very low quiescent power dissipation – 10µA

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Output On-resistance typically 22 ohms

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Integrated bleed resistors on the outputs

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Low parasitic capacitances

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DC to 10MHz analog signal frequency

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-60dB typical output off isolation at 5MHz

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CMOS logic circuitry for low power

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Excellent noise immunity

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On-chip shift register, latch and clear logic circuitry

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Flexible high voltage supplies

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Surface mount package available

General Description

The Supertex HV232 is a low charge injection 8-channel high-

voltage analog switch integrated circuit (IC) with bleed resistors.

The device can be used in applications requiring high voltage

switching controlled by low voltage control signals, such as

ultrasound imaging and printers. The bleed resistors eliminate

voltage built up on capacitive loads such as piezoelectric trans-

ducers. Input data is shifted into an 8-bit shift register which can

then be retained in an 8-bit latch. To reduce any possible clock

feed-through noise, Latch Enable Bar (LE) should be left high

until all bits are clocked in. Using HVCMOS technology, this

switch combines high voltage bilateral DMOS switches and low

power CMOS logic to provide efficient control of high voltage

analog signals.

This IC is suitable for various combinations of high voltage

supplies, e.g., V

Absolute Maximum Ratings*

V

-0.5V to +15V

V

220V

V

-0.5V to V

V

+0.5V to -200V

Logic input voltages

-0.5V to V

Analog Signal Range

V

Peak analog signal current/channel

3.0A

Storage temperature

-65°C to +150°C

Power dissipation

µ-BGA

1.0W

28-pin PLCC

1.2W

48 lead TQFP

1.0W

* Absolute Maximum Ratings are those values beyond which damage to the

device may occur. Functional operation under these conditions is not implied.

Continuous operation of the device at the absolute rating level may affect

device reliability.

HV232

V

PP

– V

NN

200V

HV232PJ

HV232FG

HV232GA

HV232X

Ordering Information

Package Options

28-lead plastic

48-lead TQFP

Die

chip carrier

10/31/01

Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability

indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to

workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the

Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.