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Texas Instruments TX75E16 5-Level 16-Channel Transmitter

Texas Instruments TX75E16 5-Level 16-Channel Transmitter is a highly integrated, high-performance transmitter for ultrasound imaging systems. The device has 16 pulser circuits and 16 transmit/receive switches (T/R or TR switches), and it supports an on-chip beamformer (TxBF). The device also integrates on-chip floating power supplies to reduce the number of required high-voltage power supplies.

The Texas Instruments TX75E16 has a pulser circuit that generates five-level high-voltage pulses (up to ±100V) that excite multiple channels of an ultrasound transducer. The device supports a total of 16 outputs. The maximum output current is 2A. The device can be used as a transmitter for many applications like ultrasound imaging, non-destructive testing, SONAR, LIDAR, marine navigation systems, brain imaging systems, etc.

Features

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

Applications

  • Ultrasound scanners
  • Piezo drivers
  • Ultrasound smart probes

Simplified Block Diagram

Block Diagram - Texas Instruments TX75E16 5-Level 16-Channel Transmitter
發佈日期: 2024-03-15 | 更新日期: 2024-04-18