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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 Downloads Product seriesL
(mm)
TiØ ID
(mm)
Ø OD
(mm)
Qty.CTol. CVR
(V (DC))
SizeDF
(%)
RISOCeramic TypeW
(mm)
H
(mm)
Technical ReferencePinsRowsGenderTypeIR
(A)
Packaging Samples
885012206076
STE ALT EAG CAD LTS PSP CADWCAP-CSGP MLCCs 25 V(DC) 1.6 40001 µF ±10% 25 0603 10 X7R Class II 0.8 0.8 X7R0603105K025DFCT10000
9774050360R
STE 3D ALT EAG IGS CADWA-SMSI SMT Steel Spacer with internal Thread M3 5 M3 4.2 6 650 Tape and Reel
61300211121
IGE STE 3D ALT EAG CADWR-PHD 2.54 mm THT Pin Header 5.081000 MΩ 2 Single Pin Header Straight 3 Bag
Order Code Data­sheet
885012206076
9774050360R
61300211121
Samples
Order Code Data­sheet Downloads Product seriesL
(mm)
TiØ ID
(mm)
Ø OD
(mm)
Qty.CTol. CVR
(V (DC))
SizeDF
(%)
RISOCeramic TypeW
(mm)
H
(mm)
Technical ReferencePinsRowsGenderTypeIR
(A)
Packaging Samples