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DATA SHEET
TX7516 Five-Level, 16-Channel Transmitter with T/R Switch, and On-Chip Beamformer
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
- Support 4A 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 4A 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: 1mW/ch
- Active transmit/receive (T/R) switch with:
- Turnon resistance of 8 Ω
- Turnon and Turnoff time: 100 ns
- Transient glitch: 10 mVPP
- 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
2 Applications
- Ultrasound imaging system
- Piezoelectric driver
- In-probe ultrasound imaging