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.