HV2731FG-G

Analog Switches - Special Purpose Overview

The HV2731FG-G is a 16-channel high-voltage analog switch IC manufactured by Microchip Technology. It operates with a differential supply voltage up to 220V and features integrated output bleed resistors. The device utilizes HVCMOS technology, combining bilateral DMOS switches with low-power CMOS logic for efficient control of high-voltage analog signals. It accepts 3.3V or 5.0V CMOS logic inputs and provides two sets of eight single-pole, single-throw (SPST) switches controlled by DIN1 and DIN2. Key electrical parameters include a typical on-resistance of 22Ω at +25°C, a maximum turn-on/turn-off time of 5µs, and a quiescent current of -10µA. The component is housed in a 48-lead LQFP package.

Analog Switches - Special Purpose Feature Summary

• Integrates internal bleed resistors on outputs to reduce voltage buildup on capacitive loads such as piezoelectric transducers.
• Utilizes HVCMOS technology to combine high-voltage bilateral DMOS switches with low-power CMOS logic.
• Features flexible operating supply voltages compatible with 3.3V and 5.0V CMOS logic levels.
• Provides excellent noise immunity and very low parasitic capacitance.

Analog Switches - Special Purpose Applications

• Medical ultrasound imaging
• Non-destructive evaluation

Analog Switches - Special Purpose Procurement Notes

Verify the specific ordering suffix 'G' confirms RoHS compliance and green packaging status as defined by the manufacturer. Confirm the package type matches the 48-lead LQFP specification with a 7.00x7.00mm body size. Ensure that the procurement documentation aligns with the official datasheet revision history to avoid discrepancies in pin configurations or electrical characteristics.

Analog Switches - Special Purpose Selection Notes

Select this component when high-voltage switching up to 220V is required while maintaining compatibility with standard low-voltage digital control interfaces. The integrated bleed resistors make it suitable for driving capacitive loads like piezoelectric elements without external discharge circuitry. Consider the 48-lead LQFP footprint for PCB layout constraints and ensure the operating temperature range meets the application's environmental requirements.

Analog Switches - Special Purpose Part Context

The HV2731 belongs to the Supertex family of high-voltage analog switches, now part of Microchip Technology's portfolio. It is designed specifically for applications requiring the isolation and switching of high-voltage signals using low-voltage logic controls. The device addresses the need for reliable signal routing in medical and industrial systems where high voltage isolation is critical.

Analog Switches - Special Purpose Replacement Considerations

Check for direct substitutes within the HV26xx/HV27xx series, such as the HV2631 or HV2731 variants, ensuring pinout and electrical specifications match. Verify if alternative packages are available from the same manufacturer for form-fit replacement purposes.

Analog Switches - Special Purpose FAQ

How are the 16 channels controlled?

The 16 channels are divided into two banks of 8. Switches SW0 to SW7 are controlled by the DIN1 input, and switches SW8 to SW15 are controlled by the DIN2 input. A logic high on the respective DIN pin turns on the associated bank of switches when the latch enable (LE) is low.

What is the function of the integrated bleed resistors?

The integrated bleed resistors connect the switch outputs to ground (RGND). They help significantly reduce voltage buildup on capacitive loads, such as piezoelectric transducers, connected to the outputs when the switches are off.

What is the maximum differential supply voltage?

The absolute maximum rating for the VPP-VNN differential supply voltage is 225V. The recommended operating conditions specify a differential supply capability up to 220V.