1 Features

1• 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: 17 mW

– In transmit-receive mode: 598 mW

– In CW mode (0.6-A mode): 1.97 W

– In global power-down mode: 4.3 mW

• 3-level, 5-level pulser:

– Maximum output voltage: ±100 V

– Minimum output voltage: ±1 V

– Maximum output current: 2.4 A to 0.6 A

– Maximum clamp current: 1 A to 0.25 A (in 3-

level mode)

– Maximum clamp current: 2 A to 0.5 A (in 5-

level mode)

– Second harmonic of –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

– Supports 4.8-A mode in 5-level mode

– –3-dB Bandwidth with 1-kΩ || 240-pF load

– 20 MHz (For ±100-V supply in 2.4-A mode)

– 36 MHz (For ±100-V supply in 4.8-A mode)

– 25 MHz (For ±70-V supply in 2.4-A mode)

• Active transmit/receive (T/R) switch with:

– ON/OFF control signal

– Turnon resistance of 12 Ω

– Bandwidth: 50 MHz

– HD2: -50 dBc

– Turnon time: 0.5 μs

– Turnoff time: 1.75 μs

– Transient glitch: 50 mVPP

• Off-chip beam former with:

– Jitter cleaning using synchronization feature

– Maximum synchronization clock frequency:

200 MHz

• On-chip beam former with:

– Delay resolution: one beamformer clock

period, minimum 5 ns

– Maximum delay: 213 beamformer clock period

– Maximum beamformer clock speed: 200 MHz

– On-chip RAM to store

– 16 Delay profiles

– 48/28 pattern-profiles for 3- or 5-level mode

• High-speed (100 MHz maximum) 1.8-V and 2.5-V

CMOS serial programming interface

• Automatic thermal shutdown

• No specific power sequencing requirement in 3-

level mode

• Small package: NFBGA-216 (15 mm × 10 mm)

with 0.8-mm pitch

2 Applications

• Ultrasound imaging system

• Piezoelectric driver

• In-probe ultrasound imaging

3 Description

The TX7316 is a highly integrated, high-performance

transmitter solution for ultrasound imaging system.

The device has total 16 pulser circuits (PULS), 16

transmit/receive (T/R) switches, and supports both

on-chip and off-chip beamformer (TxBF). The device

also integrates on-chip floating power supplies that

reduce the number of required high voltage power

supplies.