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Texas Instruments ADS8900B | Demoboard TIDA-01351

High-Resolution, High-SNR True Raw Data Conversion Reference Design for Ultrasound CW Doppler

Overview

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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

Typical applications

  • Mother and Neonatal Care Monitors / Ultrasound Scanners

Products

Order Code Data­sheet Simu­lation Downloads Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureDF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
Fl
(mm)
TiØ ID
(mm)
Ø OD
(mm)
PinsRowsH
(mm)
GenderTypeIR
(A)
Packaging Samples
885012206076SPEC
8 files WCAP-CSGP MLCCs 25 V(DC)1 µF ±10% 25 0603 -55 °C up to +125 °C 100.5 GΩ X7R Class II 1.6 0.8 0.4 0.8 7" Tape & Reel
9774050360RSPEC
6 files WA-SMSI SMT Steel Spacer with internal Thread M3 -55 °C up to +150 °C 5 M3 4.2 6 Tape and Reel
61300211121SPEC
6 files WR-PHD 2.54 mm THT Pin Header -40 °C up to +105 °C1000 MΩ 5.08 2 Single Pin Header Straight 3 Bag
Order Code Data­sheet Simu­lation
885012206076SPEC
9774050360RSPEC
61300211121SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureDF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
Fl
(mm)
TiØ ID
(mm)
Ø OD
(mm)
PinsRowsH
(mm)
GenderTypeIR
(A)
Packaging Samples