General Description

The Supertex HV2321 is a low charge injection, 8-channel, unipolar, negative 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 signals, such as NDT metal fl aw detection, medical ultrasound imaging, piezoelectric transducer drivers, and printers. The bleed resistors eliminate voltage built up on capacitive loads such as piezoelectric transducers.

Features

► Low on-resistance, 14Ω max.

► Integrated bleed resistors on the outputs

► 3.3 or 5.0V CMOS input logic level

► 20MHz data shift clock frequency

► Very low quiescent power dissipation -10µA

► Low parasitic capacitance

► DC to 10MHz analog signal frequency

► -60dB typical off-isolation at 5.0MHz

► CMOS logic circuitry for low power

► Excellent noise immunity

► Cascadable serial data register with latches

Applications

► NDT metal fl aw detection

► Medical ultrasound imaging

► Piezoelectric transducer drivers

► Inkjet printer heads

► Optical MEMS modules