ADS1294R

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4-Channel 24-Bit ADC With Integrated Respiration Impedance and ECG Front End

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Product details

Parameters

Resolution (Bits) 24 Number of input channels 4 Sample rate (Max) (kSPS) 32 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Simultaneous Sampling Rating Catalog Reference mode Int, Ext Input range (Max) (V) 5.25 Input range (Min) (V) 0 Features Daisy-Chainable, GPIO, Oscillator, PGA Operating temperature range (C) -40 to 85 Power consumption (Typ) (mW) 4.1 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 112 Analog voltage AVDD (Max) (V) 5.25 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 3.6 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

NFBGA (ZXG) 64 64 mm² 8 x 8 open-in-new Find other Precision ADCs (<=10MSPS)

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

= Featured
No results found. Please clear your search and try again. View all 8
Type Title Date
* Datasheet ADS129x Low-Power, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements datasheet (Rev. K) Aug. 07, 2015
Application notes Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
White papers Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs Mar. 19, 2015
User guides TIPD111 Verified Design Reference Guide Jun. 18, 2013
Application notes Improving Common-Mode Rejection Using the Right-Leg Drive Amplifier Jul. 06, 2011
Application notes Thermal Noise Analysis in ECG Applications May 03, 2011
Application notes Respiration Rate Measurement Using Impedance Pneumography Mar. 01, 2011
Application notes Analog Front-End Design for ECG Systems Using Delta-Sigma ADCs (Rev. A) Apr. 13, 2010

Design & development

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

Hardware development

GUIS FOR EVALUATION MODULES (EVM) Download
document-generic User guide
Description

The ADS1298R ECG FE is a reference design for the ADS1298R, a simultaneous sampling, 24-bit, delta-sigma (Δ Σ) analog-to-digital converter (ADC) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator. The ADS1298R 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 MODELS Download
SBAM163A.ZIP (145 KB) - IBIS Model
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
CALCULATION TOOLS Download
Analog-to-digital converter (ADC) input driver design tool supporting multiple input types
ADC-INPUT-CALC ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and transformer-coupled (...)
CALCULATION TOOLS Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
Features
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)

Reference designs

参考设计 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 document-generic User guide
Design files
参考设计 Download
Wireless Heart Monitor with Bluetooth Low Energy
TIDA-00096 The Wireless Heart Rate Monitor with Bluetooth low-energy (BLE) is intended as a reference design that customers can use to develop end-products for battery-powered, 3-channel health and fitness electrocardiogram (ECG) applications.  The ADS1293 is a highly integrated low-power analog front end (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
NFBGA (ZXG) 64 View options

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