TX75E16 5-Level, 16-Channel Transmitter with T/R Switch, On-Chip Beamformer, and Enhanced Load Damping Features

1 Features

Transmitter supports:
- 16-channel 5-level pulser and active transmit/receive (T/R) switch
5-level pulser:
- Maximum output voltage: ±100 V
- Minimum output voltage: ±1 V
- Maximum output current: 2 A
- Supports 4-A output current mode.
- True return to zero to discharge output to ground
- Second harmonic of –45 dBc at 5 MHz
- –3-dB Bandwidth with 1-kΩ || 240-pF load
  - 20 MHz for a ±100-V supply
  - 25 MHz for a ±70-V supply
  - 35 MHz for a ±100-V supply in 4-A mode
- Integrated jitter: 100 fs measured from 100 Hz to 20 kHz
- CW mode close-in phase noise: –154 dBc/Hz at 1-kHz offset for 5-MHz signal
- Very low receive power: 1 mW/ch
- Programmable load damp resistor: 200 Ω, 100 Ω or 67 Ω
Active transmit/receive (T/R) switch with:
- Turn-on resistance: 8 Ω
- Turn-on and turn-off time: 100 ns
- Transient glitch: 10 mV_PP
On-chip beam former with:
- Channel based T/R switch on and off controls
- Delay resolution: half beamformer clock period, minimum 2 ns
- Maximum delay: 2¹⁴ beamformer clock period
- Maximum beamformer clock speed: 320 MHz
- Per channel pattern control with 2K distinct level
- Global and local repeat pattern, enabling long duration patterns for Shear Wave imaging
- Supports 120 delay profiles
High-speed (400 MHz maximum), 2-lane LVDS serial programming interface.
- Low programming time: < 500 ns for delay profile update
- 32-bit checksum feature to detect wrong SPI writes
Supports CMOS serial programming interface (50 MHz maximum)
Internal temperature sensor and automatic thermal shutdown
No specific power sequencing requirement
Error flag register to detect faulty conditions
Integrated passives for the floating supplies and bias voltages
Small package: FC-BGA-144 (10 mm × 10 mm) with 0.8-mm pitch