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Product details

Parameters

Type Electrocardiography (ECG) Number of input channels 8 Resolution (Bits) 24 Number of LEDs 0 Operating temperature range (C) -40 to 85, 0 to 70 Interface type SPI open-in-new Find other Biosensing AFEs

Package | Pins | Size

NFBGA (ZXG) 64 64 mm² 8 x 8 TQFP (PAG) 64 144 mm² 12 x 12 open-in-new Find other Biosensing AFEs

Features

  • Eight Low-Noise PGAs and Eight High-Resolution ADCs (ADS1298, ADS1298R)
  • Low Power: 0.75 mW/channel
  • Input-Referred Noise: 4 μVPP (150 Hz BW, G = 6)
  • Input Bias Current: 200 pA
  • Data Rate: 250 SPS to 32 kSPS
  • CMRR: –115 dB
  • Programmable Gain: 1, 2, 3, 4, 6, 8, or 12
  • Supports systems meeting AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51 Standards
  • Unipolar or Bipolar Supplies:
    • AVDD = 2.7 V to 5.25 V
    • DVDD = 1.65 V to 3.6 V
  • Built-In Right Leg Drive Amplifier, Lead-Off Detection, Wilson Center Terminal, Pace Detection, Test Signals
  • Integrated Respiration Impedance Measurement
  • Digital Pace Detection Capability
  • Built-In Oscillator and Reference
  • SPI™-Compatible Serial Interface
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Description

The ADS1294, ADS1296, ADS1298 (ADS129x) and ADS1294R, ADS1296R ADS1298R (ADS129xR) are a family of multichannel, simultaneous sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with built-in programmable gain amplifiers (PGAs), internal reference, and an onboard oscillator. The ADS129x and ADS129xR incorporate all of the features that are commonly required in medical electrocardiogram (ECG) and electroencephalogram (EEG) applications. With high levels of integration and exceptional performance, the ADS129x and ADS129xR enables the development of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.

The ADS129x and ADS129xR have a flexible input multiplexer (mux) per channel that can be independently connected to the internally-generated signals for test, temperature, and lead-off detection. Additionally, any configuration of input channels can be selected for derivation of the right leg drive (RLD) output signal. The ADS129x and ADS129xR operate at data rates as high as 32 kSPS, thereby allowing the implementation of software pace detection. Lead-off detection can be implemented internal to the device, either with a pullup or pulldown resistor, or an excitation current sink or source. Three integrated amplifiers generate the Wilson central terminal (WCT) and the Goldberger central terminals (GCT) required for a standard 12-lead ECG. The ADS129xR versions include a fully integrated, respiration impedance measurement function. Multiple ADS129x and ADS129xR devices can be cascaded in high channel count systems in a daisy-chain configuration.

Package options include a tiny 8-mm × 8-mm, 64-ball BGA, and a TQFP-64. The ADS129x BGA version is specified over the commercial temperature range of 0°C to 70°C. The ADS129xR BGA and ADS129x TQFP versions are specified over the industrial temperature range of –40°C to +85°C.

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Technical documentation

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
Description

The ADS1298ECG FE is an evaluation module for the ADS1298, a simultaneous sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator. The ADS1298 incorporates all of the features (...)

Features
  • Easy-to-use evaluation software for Microsoft™ Windows XP and Windows 7
  • Built-in analysis tools including oscilloscope, FFT, and histogram displays
  • Flexible input configurations
  • Optional external reference circuits
  • Ability to export data in simple test files for post processing

Design tools & simulation

SIMULATION MODEL Download
SBAM163A.ZIP (145 KB) - IBIS Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SCHEMATIC Download
TIDCAP1.ZIP (795 KB)

Reference designs

REFERENCE DESIGNS Download
Reference Design for Software Pacemaker Detection in an ECG
TIPD197 This circuit is designed to condition and digitize an electrocardiogram signal output from the integrated PACE_OUT buffer on the ADS129x to detect artifacts of an artificial pacemaker. This circuit includes an op amp which serves as a signal conditioner and input driver for a fast-sampling SAR ADC.
document-generic Schematic
Design files
REFERENCE DESIGNS Download
Hardware Pace Detection for ECG Reference Design
TIPD111 This Verified Design outlines a hardware pace detection solution for ECG using slope detection. The circuit is designed to work smoothly with the ADS1298 through the PACEOUT pins from the ADC directly feeding the input of the pace detection circuit. When a pace signal is detected, the output from (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
NFBGA (ZXG) 64 View options
TQFP (PAG) 64 View options

Ordering & quality

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  • Ongoing reliability monitoring

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