General Description

The Supertex HV230 and HV232 are low charge injection 8-channel high-voltage analog switch integrated circuits (ICs) with bleed resistors. These devices 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 transducers. Input data is shifted into an 8-bit shift register which can then be retained in an 8-bit latch.

Features

❏ HVCMOS® technology for high performance

❏ Very low quiescent power dissipation – 10µA

❏ Output On-resistance typically 22 ohms

❏ Integrated bleed resistors on the outputs

❏ Low parasitic capacitances

❏ DC to 10MHz analog signal frequency

❏ -60dB typical output off isolation at 5MHz

❏ CMOS logic circuitry for low power

❏ Excellent noise immunity

❏ On-chip shift register, latch and clear logic circuitry

❏ Flexible high voltage supplies

Applications

❏ Medical ultrasound imaging

❏ Piezoelectric transducer drivers