General Description

The MAX14808/MAX14809 octal three-level/quad fivelevel, high-voltage (HV) pulser devices generate highfrequency HV bipolar pulses (up to Q105V) from lowvoltage control logic inputs for driving piezoelectric transducers in ultrasound systems. All eight channels have embedded overvoltage-protection diodes and an integrated active return-to-zero clamp. Both devices have embedded independent (floating) power supplies (FPS) and level shifters that allow signal transmission without the need for external HV capacitors. The MAX14808 also features eight integrated transmit/receive (T/R) switches. The MAX14809 does not have the T/R switch function.

Benefits and Features

◆ Save Space (Optimized for High-Channel-Count Systems/Portable Systems)

??? ◇ High Density

??????? ? 8 Channels (Three-Level Operation)

??????? ? 4 Channels (Five-Level Operation) in One Package

??? ◇ Integrated Low-Power T/R Switches (MAX14808)

??? ◇ DirectDrive? Architecture Eliminates External High-Voltage Capacitor

??? ◇ No External Floating Power Supply (FPS) Required

◆ High Performance (Designed to Enhance Image Quality)

??? ◇ Excellent -43dBc (typ) THD for Second Harmonic at 5MHz

??? ◇ Sync Function Eliminates Effects of FPGA Jitter and Improves Performance in Doppler Mode

??? ◇ Low Propagation Delay 18ns (typ)

??? ◇ Strong Active Return to Zero

◆ Save Power

??? ◇ Low Quiescent Power Dissipation (5.7mW/ Channel in Octal Mode)

??? ◇ Programmable Current Capability

??? ◇ Shutdown Mode and Disable Transmit Mode

Applications

??? Ultrasound Medical Imaging

??? Industrial Flaw Detection

??? Piezoelectric Drivers

??? Test Equipment