MICROCHIP HV2722/R4X

The HV2621/HV2721/HV2722 devices are 300V, low-charge injection, 16-channel, high-voltage analog switches. These devices are designed for use in applications requiring high-voltage switching controlled by low-voltage control signals, such as medical ultrasound imaging, piezoelectric transducer drivers. HV2621/HV2721 are almost identical to HV2601/2701 but have larger signal range. If the VPP/VNN = ±150V, HV2621/HV2721/HV2722 can pass the analog signal up to ±135V. The HV2721 has integrated bleed resistors on both sides of the switches. HV2722 has integrated bleed resistors on one side, SWxA only. HV2621 has no bleed resistors. The bleed resistor eliminates voltage build-up on capacitive loads such as piezoelectric transducers. Input data are shifted into a 16-bit shift register that can then be retained in a 16-bit latch. To change all the switch state at the same time, the latch enable bar should be left high until all bits are clocked in. The input data are clocked in at the rising edge of the clock. After all bits are clocked in to the shift register, a negative pulse of the latch enable bar changes all the switch ON/OFF states defined by input data at the same time. Using the HVCMOS technology, these devices combine 300V high-voltage bilateral DMOS switches and low-power CMOS logic to provide efficient control of high-voltage analog signals. These devices are suitable for various combinations of high-voltage supplies, e.g., VPP/VNN +60V/ - 240V, +150V/ - 150V, and +260V/ - 40V.

• 300V, 16-Channel High-Voltage Analog Switch
• 3.3V or 5.0V CMOS Input Logic Level
• 33 MHz Data Shift Clock Frequency
• Very Low Quiescent Current (10 μA)
• Low Parasitic Capacitance
• DC to 50 MHz Analog Small-Signal Frequency
• -60 dB Typical Off Isolation at 5.0 MHz
• Excellent Noise Immunity
• Cascadable Serial Data Register with Latches
• Flexible Operating Supply Voltage
• Integrated Bleed Resistors on the Outputs (both sides for HV2721, one side only for HV2722)

• Medical Ultrasound Imaging
• Nondestructive Testing (NDT) Metal Flaw Detection
• Multi-Layer Printed Circuit Board (PCB) Tester
• Piezoelectric Transducer Drivers
• Inkjet Printer Head
• Optical MEMS Module