Texas Instruments TX7332ZBX

TX7332ZBX Description
A highly integrated, high-performance transmitter for an ultrasound imaging system is the TX7332ZBX. The system supports both on-chip and off-chip beamformers and contains a total of 32 pulser circuits (PULS), 32 transmit/receive (T/R) switches, and (TxBF). Additionally, the gadget includes on-chip floating power supplies that cut down on the amount of high voltage power supplies needed.

TX7332ZBX Features
On-chip beamformer with:
– Delay resolution: one beamformer clock period – Maximum delay: 2'13 beamformer clock period – Maximum beamformer clock speed: 200 MHz – On-chip RAM to store – 16 delay profiles – 32 pattern profiles High-speed (100 MHz maximum) 1.8-V and 2.5-V CMOS serial programming interface
Automatic thermal shutdown
No specific power sequencing requirement
Small package: 260-pin NFBGA (17 mm × 11 mm) with 0.8-mm pitch
TX7332 supports:
– 32-channel three-level pulser and active transmit/receive (T/R) switch – Very low power on-chip beamforming mode:   – In receive-only mode: 0.45 mW/ch   – In transmit-receive mode: 16.4 mW/ch   – In CW mode: 160 mW/ch   – In global power-down mode: 0.1 mW/ch Three-level pulser:
– Maximum output voltage: ±100 V – Minimum output voltage: ±1 V – Maximum output current: 1.2 A to 0.3 A – Maximum clamp current: 0.5 A to 0.12 A – Second harmonic : –45 dBc at 5 MHz – CW mode 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 – –3-dB bandwidth with 2-kΩ || 120-pF load   – 20 MHz (for ±100-V supply)   – 25 MHz (for ±70-V supply) Active T/R switch with:
– ON, OFF control signals – Bandwidth: 50 MHz – HD2: –50 dBc – Turnon resistance: 24 Ω – Turnon time: 0.5 µs – Turnoff time: 1.75 µs – Transient glitch: 50 mVPP Off-chip beamformer with:
– Jitter cleaning using synchronization feature – Maximum synchronization clock frequency: 200 MHz

TX7332ZBX Applications
Ultrasound imaging system
Piezoelectric driver
In-probe ultrasound imaging