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: ±100V

– Minimum output voltage: ±1V

– Maximum output current: 2A

– Support 4A output current mode

– True return to zero to discharge to ground

– Second harmonic of –45dBc at 5MHz

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

• –20MHz for a ±100V supply

• 35MHz for a ±100V supply in 4A

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

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

1kHz offset for 5MHz signal

• Active T/R switch with:

– Turn ON resistance: 8Ω

– Turn ON and OFF time: 300ns

– 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 1.56ns

– Maximum delay: 214 beamformer clock period

– Per channel 960 × 32 bits memory to store

waveform and delay values.

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

serial programming interface

– Very low programming time: < 500ns 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 (12mm × 12mm) with

0.8mm 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.