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