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

3 Description

TX7516 is a highly integrated, high-performance

transmitter solution for ultrasound imaging system.

The device has total 16 pulser circuits, 16 transmit/

receive switches (referred as T/R or TR switches),

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

also integrates on-chip floating power supplies that

reduce the number of required high voltage power

supplies.

TX7516 has a pulser circuit that generates five-level

high voltage pulses (up to ±100 V) that is used to

excite multiple channels of an ultrasound transducer.

The device supports total 16 outputs. The maximum

output current is 2 A.

Device can be used as a transmitter solution for many

applications like ultrasound imaging, non-destructive

testing, SONAR, LIDAR, marine navigation system,

brain imaging systems and so on.

Device Information

PART NUMBER

PACKAGE(1)

BODY SIZE (NOM)

TX7516

FC-BGA (144)

10.0 mm × 10.0 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

OUT_1

RX_1

Thermal

Shutdown

High Speed SPI Interface

with Error Detection

Pattern

Profile

Delay

Profile

Floating

Supply

A

Pulser

A- and B-Group

Pulser

Temperature

Sensor

On-chip

Transmit

Beamforming

B

Pulser

OUT_16

RX_16

A

Pulser

T/R

Switch

B

Pulser

T/R

Switch

Integrated

Passives

Error Flag Register

Simplified Block Diagram

TX7516

SLOSE40A – JUNE 2021 – REVISED MARCH 2022

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.