Microchip Technology HV232
The HV232 is an 8-channel, low-charge-injection, high-voltage, analog switch integrated circuit (IC) with bleed resistors. This 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 transducers.FEATURES
● 10 µA Maximum Quiescent Power Dissipation● 22Ω Typical Output On-resistance
● Integrated Bleed Resistors on the Outputs
● Low Parasitic Capacitance
● DC to 50 MHz Small Signal Frequency Response
● –60 dB Typical Off-isolation at 5 MHz
● 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
GENERAL DESCRIPTION
Input data is shifted into an 8-bit Shift register which can be retained in an 8-bit latch. To reduce any possible clock feed-through noise, latch enable (LE) should be left high until all bits are clocked in. This switch combines high-voltage bilateral DMOS switches and low-power CMOS logic to provide efficient control of high-voltage analog signals. The HV232 is suitable for various combinations of high -voltage supplies, e.g., VPP/VNN: +40V/–160V and +100V/–100V, and +160V/–40V. Package Types...