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ADS1198

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Low-Noise, 8 Channel, 16 Bit Analog Front End for ECG/EEG Measurements

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Low-Noise, 8 Channel, 16 Bit Analog Front End for ECG/EEG Measurements

ADS1198

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Product details

Parameters

Resolution (Bits) 16 Number of input channels 8 Sample rate (Max) (kSPS) 8 Interface 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) 0 to 70 Power consumption (Typ) (mW) 4.3 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 97 Analog voltage AVDD (Max) (V) 5.25 INL (Max) (+/-LSB) 1 Digital supply (Min) (V) 1.65 Digital supply (Max) (V) 3.6 Approx. price (US$) 12.63 | 1ku open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

NFBGA (ZXG) 64 64 mm² 8 x 8 TQFP (PAG) 64 144 mm² 12 x 12 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • Eight Low-Noise PGAs and
    Eight High-Resolution ADCs (ADS1198)
  • Low Power: 0.55mW/channel
  • Input-Referred Noise:
    12µVPP (150Hz BW, G = 6)
  • Input Bias Current: 200pA
  • Data Rate: 125SPS to 8kSPS
  • CMRR: –105dB
  • Programmable Gain: 1, 2, 3, 4, 6, 8, or 12
  • Supports AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51 Standards
  • Supplies: Unipolar or Bipolar
    • Analog: 2.7V to 5.25V
    • Digital: 1.65V to 3.6V
  • Built-In Right Leg Drive Amplifier, Lead-Off Detection, WCT, Test Signals
  • Pace Detection Channel Select
  • Built-In Oscillator and Reference
  • Flexible Power-Down, Standby Mode
  • SPI™-Compatible Serial Interface
  • Operating Temperature Range:
    0°C to +70°C
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Description

The ADS1194/6/8 are a family of multichannel, simultaneous sampling, 16-bit, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator.

With its high levels of integration and exceptional performance, the ADS1194/6/8 family enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.

The ADS1194/6/8 have a flexible input multiplexer 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 ADS1194/6/8 operate at data rates as high as 8kSPS, thereby allowing the implementation of software pace detection. Lead-off detection can be implemented internal to the device, either with a pull-up/pull-down resistor or an excitation current sink/source. Three integrated amplifiers generate the Wilson Center Terminal (WCT) and the Goldberger terminals (GCT) required for a standard 12-lead medical electrocardiogram (ECG).

Multiple ADS1194/6/8 devices can be cascaded in high channel count systems in a daisy-chain configuration.

Package options include a tiny 8mm × 8mm, 64-ball BGA and a TQFP-64. Both packages are specified over the temperature range of 0°C to +70°C.

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Technical documentation

= Featured
No results found. Please clear your search and try again. View all 13
Type Title Date
* Datasheet Low-Power, 8-Channel, 16-Bit Analog Front-End for Biopotential Measurements datasheet (Rev. C) Nov. 29, 2011
Application notes Heart-Rate and EKG Monitor Using the MSP430FG439 (Rev. B) Mar. 09, 2018
Application notes Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
Application notes How delta-sigma ADCs work, Part 1 (Rev. A) Sep. 19, 2016
User guides ADS1298ECGFE-PDK, ADS1198ECGFE-PDK (Rev. D) Jan. 05, 2016
More literature Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs Mar. 19, 2015
Application notes Understanding Lead-Off Detection in ECG (Rev. A) Jan. 14, 2015
User guides TIPD111 Verified Design Reference Guide Jun. 18, 2013
Application notes How delta-sigma ADCs work, Part 2 Nov. 09, 2011
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

EVALUATION BOARDS Download
Description

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 (...)

View details
EVALUATION BOARDS Download
document-generic User guide
Description

The ADS1198ECG FE is a reference design for the ADS1198, a simultaneous sampling, 16-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator. The ADS1198 incorporates all of the features that (...)

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
View details

Design tools & simulation

SIMULATION MODELS Download
SBAM080C.ZIP (144 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 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
  • (...)
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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 document-generic User guide
Design files
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CAD/CAE symbols

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

Ordering & quality

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Training series

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Videos

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Posted: 23-Sep-2010
Duration: 03:07

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