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High-Resolution, High-SNR True Raw Data Conversion Reference Design for Ultrasound CW Doppler
TIDA-01351
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Key Document

Description

The TIDA-01351 is a continuous wave (CW) signal conditioning subsystem for ultrasound imaging systems (64-, 128-, 192-, 256-channel ultrasound system). This design features 20-bit fully differential simultaneous sampling with true raw data available for processing. This TI Design consists of a fullydifferential signal path for I and Q channels, each using high-performance SAR analog-to-digital converters (ADCs) (ADS8900B), fully-differential precision amplifiers (THS4551), a dual low-noise, lowdropout (LDO) voltage regulator (TPS7A8801), and a precision voltage reference (REF5050). The TIDA-01351 can be interfaced with the PH1-EVM controller through the multiSPI™ digital interface, and the performance can be evaluated using a PC-based application (GUI) from any PC through the USB interface.

Features
  • Two simultaneous channels (I and Q) fully-differential signal chain providing zero-latency true raw data With SNR of 101.2dB and ENOB of 16.45
  • 8-channel summing, filtering, buffering, and gain implemented in single-stage-high-bandwidth, low-power, low-noise, single supply
  • High sampliing rate of 1 MSPS allows flexibility in post-processing to improve SNR and resolution
  • Bandpass filtering for frequency range of 50 Hz to 20 kHz
  • Operates from single 6-V power supply with total power consumption of 258 mW
  • Designed using 20-bit, 1 MSPS SAR ADC (ADS8900B) with INL of 1ppm and SNR of 104.5dB

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TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS8900B  20-Bit, 1-MSPS, 1-Ch SAR ADC with Internal VREF Buffer, Internal LDO and Enhanced SPI Interface  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
OPA376  Precision (0.025mV), low noise (7.5nV/rtHz), low quiescent current (760uA) op amp  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
REF5050  5-V, 3-µVpp/V noise, 3-ppm/°C drift precision series voltage reference  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
THS4551  Low Noise, Precision, 150MHz, Fully Differential Amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
TPS7A88  1-A, low-noise, high-PSRR, dual-channel adjustable ultra-low-dropout voltage regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS8900B Download
OPA376 Download Download
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REF5050 Download Download
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THS4551 Download
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TPS7A88 Download Download

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Technical documentation

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Datasheet (1)
Title Type Size (KB) Date
PDF 3403 29 Jun 2017
Application notes (3)
Title Type Size (KB) Date
PDF 422 20 Nov 2017
PDF 78 14 Jun 2017
PDF 410 09 Mar 2017
User guides (1)
Title Type Size (KB) Date
PDF 8399 18 Oct 2017
White papers (1)
Title Type Size (KB) Date
PDF 149 08 Nov 2016
Design files (6)
Title Type Size (KB) Date
PDF 903 31 Jul 2018
ZIP 2381 31 Jan 2017
ZIP 2265 31 Jan 2017
PDF 4318 31 Jan 2017
PDF 942 31 Jan 2017
PDF 145 31 Jan 2017
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Software development (1)



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