Texas Instruments ADS129xR 24-Bit Analog Front-End Devices

Texas Instruments ADS1294R, ADS1296R, and ADS1298R 8-channel, 24-bit Analog Front-End (AFE) devices for biopotential measurements offer high levels of integration and exceptional performance. These features enable the development of scalable medical instrumentation systems at significantly reduced size, power, and overall cost. TI ADS1294R, ADS1296R, and ADS1298R devices are multichannel, simultaneous sampling, 24-bit, delta-sigma Analog-to-Digital Converters (ADCs) with built-in Programmable Gain Amplifiers (PGAs), internal reference, and an onboard oscillator. These devices also feature integrated respiration impedance measurements. The ADS129xR front-end devices incorporate all of the features that are commonly required in medical electrocardiogram (ECG) and electroencephalogram (EEG) applications. The ADS1294R, ADS1296R, and ADS1298R AFEs operate at data rates as high as 32kSPS, allowing the implementation of software PACE detection.

Features

  • Up to eight low-noise PGAs and eight high-resolution ADCs
  • Low power of 0.75mW/channel
  • 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
  • Integrated respiration impedance measurement
  • Digital PACE detection capability
  • Built-in oscillator and reference
  • Flexible power-down, standby modes
  • SPI™-compatible serial interface
  • -40°C to +85°C operating temperature range
  • Non-magnetic BGA package

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 monitors
  • High-precision, simultaneous, multi-channel signal acquisition

Functional Block Diagram

Block Diagram - Texas Instruments ADS129xR 24-Bit Analog Front-End Devices

TI Reference Designs Library

TI Reference Designs - Texas Instruments ADS129xR 24-Bit Analog Front-End Devices
发布日期: 2011-04-14 | 更新日期: 2022-03-11