High-voltage, latchup-free analogue switches come in 16-ch BGA packages

October 30, 2014 // By Graham Prophet
Maxim Integrated has posted details of the MAX4968B and, MAX4968C, which are 16-channel, high-linearity, high-voltage (HV), bidirectional SPST analogue switches with 18Ω (typ) on-resistance.

Use the parts, Maxim suggests, in applications requiring high-voltage switching controlled by a low-voltage control signal, such as ultrasound imaging and industrial printing. The MAX4968C differs by providing integrated 40 kΩ bleed resistors on each switch terminal to discharge capacitive loads. Using HVCMOS technology, these switches combine high-voltage bilateral MOS switches and low-power CMOS logic to provide efficient control of high-voltage analogue signals.

In typical ultrasound applications, the MAX4968B/MAX4968C do not require a dedicated HV supply, which implies a significant simplification of system requirements. The negative voltage supply can be shared with the transmitter and the positive voltage supply is typically +12V.

The devices are available in the 64-bump BGA package and are specified over the -40°C to +85°C extended temperature range.

Maxim Integrated; http://www.maximintegrated.com/en/products/analog/analog-switches-multiplexers/MAX4968B