Texas Instruments TX7316 3- or 5-Level Transmitters
Texas Instruments TX7316 3- or 5-Level Transmitters is a highly integrated, high-performance solution for an ultrasound imaging system. The TX7316 features 16 pulser circuits (PULS), 16 transmit/receive (T/R) switches, and supports both on-chip and off-chip beamformers (TxBF). The device also integrates on-chip floating power supplies that reduce the required high-voltage power supplies.
The Texas Instruments TX7316 Transmitters offer a pulser circuit that generates three-level high voltage pulses (up to ±100V) that can be used to excite multiple channels of an ultrasound transducer. A T/R switch protects the receiver circuit under the OFF state by providing high isolation between the high-voltage transmitter and the low-voltage receiver when the pulser generates high-voltage pulses.
In the off-chip beamformer mode, the output transition of each pulser and TR switch ON/OFF operation is controlled by external control pins. Ultrasound transmission relies on the excitation of multiple transducer elements, with the delay profile of the excitation across the different elements defining the direction of the transmission. The TX7316 3- or 5-Level Transmitters are available in a 15mm × 10mm 216-pin NFBGA package and are specified for operation from 0°C to 70°C.
Features
- Transmitter supports
- 16-channel 3-level or 8-channel 5-level pulser and active transmit/receive (T/R) switch
- Very low power on-chip beamforming mode (5-level mode)
- In receive-only mode: 17mW
- In transmit-receive mode: 598mW
- In CW mode (0.6A mode): 1.97W
- In global power-down mode: 4.3mW
- 3-level and 5-level pulser
- Maximum output voltage: ±100V
- Minimum output voltage: ±1V
- Maximum output current: 2.4A to 0.6A
- Maximum clamp current: 1A to 0.25A (in 3-level mode)
- Maximum clamp current: 2A to 0.5A (in 5-level mode)
- The second harmonic of –45dBc at 5MHz
- CW mode jitter: 100fs measured from 100Hz to 20kHz
- CW mode close-in phase noise: –154dBc/Hz at 1kHz offset for 5MHz signal
- Supports 4.8A mode in the 5-level mode
- –3dB Bandwidth with 1kΩ || 240pF load
- 20MHz (For ±100V supply in 2.4A mode)
- 36MHz (For ±100V supply in 4.8A mode)
- 25MHz (For ±70V supply in 2.4A mode)
- Active transmit/receive (T/R) switch with
- ON/OFF control signal
- Turn-on resistance of 12Ω
- Bandwidth: 50MHz
- HD2: -50dBc
- Turn-on time: 0.5µs
- Turn-off time: 1.75µs
- Transient glitch: 50mVPP
- Off-chip beamformer with
- Jitter cleaning using the synchronization feature
- Maximum synchronization clock frequency: 200MHz
- On-chip beamformer with
- Delay resolution: one beamformer clock period, minimum 5ns
- Maximum delay: 213 beamformer clock period
- The maximum beam former clock speed is 200MHz
- On-chip RAM to store
- 16 Delay profiles
- 48/28 pattern profiles for 3- or 5-level mode
- High-speed (100MHz maximum) 1.8V and 2.5V CMOS serial programming interface
- Automatic thermal shutdown
- There is no specific power sequencing requirement in the 3-level mode
- Small package: NFBGA-216 (15mm × 10mm) with 0.8mm pitch
Applications
- Ultrasound imaging system
- Piezoelectric driver
- In-probe ultrasound imaging
Functional DIagram
Related Development Tool
Texas Instruments TX7316EVM Evaluation Module (EVM)
Designed to evaluate the TX7316, a 16-channel 3-level or 8-channel 5-level transmitter.