MAX4802CQI+

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX4802CQI+ is an eight-channel high-voltage analog switch manufactured by Analog Devices Inc./Maxim Integrated. It utilizes BCDMOS technology to provide low-charge-injection SPST switches controlled via a serial interface. The device operates with wide-range high-voltage supplies, supporting VPP/VNN configurations such as +100V/-100V, +185V/-15V, and +40V/-160V. The digital interface functions on a separate VDD supply ranging from +2.7V to +13.2V. Key electrical parameters include a maximum on-resistance of 38Ω at ICOM = 5mA, turn-on/turn-off times of 5µs, and off-capacitance of 18pF. It features integrated 35kΩ bleed resistors for capacitive load discharge and is housed in a 28-pin PLCC package.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Pin-compatible replacement for Supertex HV232
• Integrated 35kΩ bleed resistors on each switch terminal
• Low-charge injection and low-capacitance switches
• Flexible high-voltage supply operation up to 200V difference

Analog Switches, Multiplexers, Demultiplexers Applications

• Ultrasound imaging systems
• Printer applications

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the component status before procurement, as the MAX4802CQI+ may be discontinued or subject to end-of-life notices. Confirm that the specific ordering suffix corresponds to the required RoHS compliance and packaging format. Ensure compatibility with existing board layouts due to its pin-compatible design with legacy parts.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select the MAX4802CQI+ when integrated bleed resistors are required to discharge capacitive loads like piezoelectric transducers. Choose this part over the MAX4800 if the application demands internal discharge paths without external components. Verify that the voltage differential between VPP and VNN does not exceed 200V and that the digital logic levels align with the +13.2V tolerant inputs.

Analog Switches, Multiplexers, Demultiplexers Part Context

The MAX4802CQI+ belongs to the MAX4800/MAX4801/MAX4802 family of low-charge injection, 8-channel, high-voltage analog switches. While the MAX4800 lacks bleed resistors and the MAX4801 serves as a drop-in for the HV20320, the MAX4802 specifically replaces the Supertex HV232. All variants share similar control interfaces and package options, differing primarily in the presence of internal bleed resistors.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The MAX4802CQI+ is a direct pin-compatible replacement for the Supertex HV232. Designers replacing older designs should verify that the new device's power-on reset behavior and serial interface timing meet the system requirements.