HV2733FG-G

Analog Switches - Special Purpose Overview

The HV2733FG-G is a 16-channel, low harmonic distortion, high voltage analog switch integrated circuit manufactured by Microchip Technology. It features single-pole double-throw (SPDT) output switches with integrated bleed resistors to eliminate voltage buildup on capacitive loads. The device utilizes HVCMOS technology and operates with a logic supply voltage of 3.0V to 5.5V and dual high-voltage supplies ranging from -40V to +200V. It includes an 8-bit serial shift register with latches for control. Key electrical parameters include a maximum ON-resistance of 25 Ohms, a clock frequency up to 20MHz, and a small signal frequency response of DC to 50MHz. The component is housed in a 48-lead LQFP package.

Analog Switches - Special Purpose Feature Summary

• Integrated bleed resistors on outputs to discharge capacitive loads
• Low charge injection and low harmonic distortion design
• Cascadable serial data register with latches for efficient control
• HVCMOS technology combining high voltage bilateral DMOS switches with low power CMOS logic

Analog Switches - Special Purpose Applications

• Medical ultrasound imaging
• NDT metal flaw detection
• Piezoelectric transducer drivers
• Optical MEMS modules

Analog Switches - Special Purpose Procurement Notes

Verify the datasheet version and manufacturer origin, as the component was originally developed by Supertex Inc., which was acquired by Microchip Technology. Confirm that the specific ordering suffix 'FG' corresponds to the 48-lead LQFP package and RoHS compliance status required for your assembly process. Ensure compatibility with the recommended operating conditions regarding power-up sequences and voltage slew rates.

Analog Switches - Special Purpose Selection Notes

Select this component when high voltage switching is required with minimal signal distortion and low quiescent power consumption. The integrated bleed resistors make it suitable for driving piezoelectric transducers where residual voltage must be managed. Verify that the required signal voltage range falls within the specified VPP and VNN limits and that the control logic levels match the available VDD supply voltage.

Analog Switches - Special Purpose Part Context

The HV2733 belongs to the HV27xx series of high voltage analog switches designed for demanding applications requiring precise signal routing at elevated voltages. It shares architectural similarities with other devices in the family but is distinguished by its SPDT configuration and integrated bleed resistor functionality. This specific part number represents the industry-standard solution for controlling high voltage analog signals using low voltage digital interfaces.

Analog Switches - Special Purpose Replacement Considerations

Direct replacements may include other parts from the HV27xx series such as the HV2705 or HV2706, though these typically feature SPST configurations rather than SPDT. Verify pinout compatibility and check if the absence of integrated bleed resistors in alternative parts requires external circuit modifications to handle capacitive load discharging effectively.

Analog Switches - Special Purpose FAQ

What is the function of the integrated bleed resistors?

The integrated bleed resistors are connected between the output switches and ground (RGND). Their primary function is to eliminate voltage buildup on capacitive loads, such as piezoelectric transducers, when the switches are in the off state.

How does the serial data input work?

Data is shifted into an 8-bit shift register using an external clock signal on the rising edge of CLK. The latch enable (LE) signal then transfers the data from the shift register to the individual switch latches, determining the state of each SPDT switch.

What is the maximum clock frequency supported?

The device supports a maximum data shift clock frequency of 20 MHz, allowing for relatively fast serial data loading while maintaining low harmonic distortion in the analog signal path.