MAX4800CQI+T

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX4800CQI+T is an eight-channel high-voltage analog switch in a 28-pin PLCC package. It operates with VPP/VNN supplies ranging from +40V/-160V to +185V/-15V, allowing a peak-to-peak signal swing of up to 200V. The digital interface uses a separate VDD supply from +2.7V to +13.2V. Key electrical parameters include a maximum on-resistance of 38Ω at 5mA and 27Ω at 200mA, turn-on/turn-off times of 5µs, and off-isolation of -77dB at 5MHz. Charge injection is typically 820pC at ±100V supplies.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Pin-compatible drop-in replacement for Supertex HV20220
• BCDMOS process technology for low charge injection
• Serial control via 8-bit shift register with latch enable and clear
• Power-on reset ensures switches open upon initialization

Analog Switches, Multiplexers, Demultiplexers Applications

• Ultrasonic imaging systems
• Printer applications

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the component status as discontinued or limited supply through official Analog Devices channels. Confirm RoHS compliance (+ suffix) and package integrity (28-PLCC). Ensure design compatibility with existing high-voltage power rails before procurement.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this part for designs requiring direct replacement of Supertex HV20220 devices. Verify that the required analog signal range fits within the VPP and VNN limits. Ensure the controller logic levels are compatible with the +13.2V tolerant inputs.

Analog Switches, Multiplexers, Demultiplexers Part Context

This device belongs to the MAX4800/MAX4801/MAX4802 family of low-charge injection, 8-channel high-voltage analog switches. The MAX4800 variant specifically lacks integrated bleed resistors, distinguishing it from the MAX4802 which includes them for capacitive load discharge.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Confirmed pin-compatible replacements include the Supertex HV20220PJ.

Analog Switches, Multiplexers, Demultiplexers FAQ

How does the serial interface control the switches?

Data is clocked into an internal 8-bit shift register on the rising edge of CLK. Latching the data to update the switches requires driving the LE input low.

What is the function of the CLR input?

Driving the CLR input high resets the latch contents to zero, forcing all eight analog switches to the open state without affecting the shift register data.

Can multiple devices be daisy-chained?

Yes, the DOUT pin reflects the DIN data delayed by eight clock cycles, allowing connection to the DIN of subsequent devices for simultaneous control.