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Texas Instruments ADS1298 Analog Front End

Texas Instruments ADS1298 Analog Front-End (AFE) devices for biopotential measurements features eight low-noise programmable gain amplifiers (PGAs) and eight high-resolution analog-to-digital converters (ADCs). These TI 24-bit ADCs with built-in PGAs incorporate all of the features commonly required in medical ECG and EEG applications. TI ADS1298 AFE devices have a flexible input multiplexer per channel that can be independently connected to the internally-generated signals for test, temperature, and lead-off detection. Multiple ADS1298 devices can be cascaded in high channel count systems in a daisy-chain configuration.

Features

  • Eight low-moise PGAs and eight high-resolution ADCs
  • 0.75mW/channel low power
  • 4µVPP (150Hz BW, G = 6) input-referred noise
  • 200pA input bias current
  • 250SPS to 32kSPS data rate
  • –115dB CMRR
  • 1, 2, 3, 4, 6, 8, or 12 programmable gain
  • Supports AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51 standards
  • Unipolar or bipolar supplies:
    • AVDD = 2.7V to 5.25V, DVDD = 1.65V to 3.6V
  • Built-in right leg drive amplifier, lead-off detection, WCT, PACE detection, test signals

Applications

  • Medical instrumentation (ECG, EMG and EEG)
    • Patient monitoring
    • Holter, event, stress, and vital signs including ECG, AED, telemedicine bispectral index (BIS), evoked audio potential (EAP), sleep study monitor
  • High-precision, simultaneous, multichannel signal acquisition

Block Diagram

Block Diagram - Texas Instruments ADS1298 Analog Front End

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Paskelbta: 2011-09-02 | Atnaujinta: 2022-03-11