1 Features

? 8-Channel transmitter, each channel includes:

– 5-level pulser with on-chip beamforming

– Active T/R switch

– Integrated floating supplies

? 5-Level Pulser supports:

– Maximum output voltage: ±100 V

– Minimum output voltage: ±1 V

– Maximum output current: 2 A

– Support 4-A output current mode

– True return to zero to discharge to ground

– Second harmonic of –45 dBc at 5 MHz

– –3-dB Bandwidth with 220-Ω || 240-pF load

? –20 MHz for a ±100-V supply

? 35 MHz for a ±100-V supply in 4A

– Integrated jitter: 100 fs from 100 Hz to 20 kHz

– CW mode close-in phase noise: –154 dBc/Hz

at 1-kHz offset for 5-MHz signal

? Active T/R switch with:

– Turn ON resistance: 8 Ω

– Turn ON and OFF time: 300 ns

– Channel based T/R switch on and off controls

? On-chip beamformer for pulser with:

– Channel based T/R switch on and off controls

– Delay resolution: Half beamformer clock period,

minimum 1.56 ns

– Maximum delay: 214 beamformer clock period

– Per channel 960 × 32 bits memory to store

waveform and delay values.

? High-speed (400-MHz maximum), 2-lane LVDS

serial programming interface

– Very low programming time: < 500 ns for delay

profile update

– 32-bit Checksum feature to detect wrong SPI

writes

? Internal temperature sensor and automatic thermal

shutdown

? No specific power sequencing requirement

? Error flag register to detect multiple faulty condition

? Integrated passives for the floating supplies and

bias voltages

? Small package: FCCSP-196 (12 mm × 12 mm)

with 0.8-mm pitch

2 Applications

? Ultrasound pulser imaging system

? Piezoelectric driver

3 Description

The TX08D is a transmitter solution for ultrasound

imaging systems. The device supports eight channels

with each channel consisting of pulser transmit/

receive (T/R) switches.