SLOSE40A June   2021  – March 2022 TX7516

PRODUCTION DATA  

  1. 1Features
  2. 2Applications
  3. 3Description
  4. 4Revision History
  5. 5Description (continued)
  6. 6Device and Documentation Support
    1. 6.1 Document Support
    2. 6.2 Receiving Notification of Documentation Updates
    3. 6.3 Support Resources
    4. 6.4 Trademarks
    5. 6.5 Electrostatic Discharge Caution
    6. 6.6 Glossary
  7. 7Mechanical, Packaging, and Orderable Information
    1. 7.1 Mechanical Data

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • ALH|144
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Description (continued)

TX7516 (referred as device in this data sheet) is highly integrated transmitter solution targeted for exciting ultrasound transducers. Device integrates 16 pulsers and 16 T/R switches, on-chip beamformer, and pattern generator.

Pulser circuit generates five-level high voltage pulses (up to ±100 V) with maximum output current of 2A. When pulser transmits the high voltage pulses, T/R switch turns OFF and protects the low voltage receiver circuit from damage. When the transducer is receiving echo signals, the T/R switch turns ON and connects the transducer to the receiver. The ON/OFF operation of the T/R switch is controlled by on-chip beamforming engine in the device. The T/R switch offers 8-Ω impedance in the ON state.

Ultrasound transmission relies on excitation of multiple transducer elements, with different delay values defining the direction of the transmission. Such an operation is referred to as transmit beamforming. TX7516 supports staggered pulsing of the different channels, allowing for transmit beamforming.

In the on-chip beamformer mode, delay profile for pulsing of different channels is stored within the device. The device supports a transmit beamformer delay resolution of one beamformer clock period and a maximum delay of 214 beamformer clock periods. An internal pattern generator generates the output pulse patterns based on pattern profiles stored in a profile RAM. Each channel has its own RAM, which is 960 words long. The patterns have global and local repeats feature. This capability can be used to generate long patterns and can be used in Shear-Wave imaging.

These pattern profiles and delay profiles are written using a high speed (400 MHz) serial peripheral interface. The high-speed writes could be prone to errors. Hence, the device has a checksum feature to detect errors in SPI writes.

To protect the device from getting damaged because of improper configuration, an internal error flag register can detect faulty condition and configure the device in shutdown mode automatically.

The device integrates all the decoupling capacitors required for the floating supplies and internal bias voltages. This significantly reduces the required number of external capacitors. TX7516 is available in a 10-mm × 10-mm 144-pin FC-BGA package (ALH package) and is specified for operation from 0°C to 70°C.