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Texas Instruments Signal Chain Guide 2013 | 63

Data Converters

Analog Front Ends – Medical

Complete Low Power Integrated Analog Front End for ECG Applications

ADS1293

Low-Noise, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements

ADS1299

The ADS1293 incorporates all features commonly required in portable, low-power medical,

sports, and fitness electrocardiogram (ECG) applications. With high levels of integration and

exceptional performance, the ADS1293 enables the creation of scalable medical instru-

mentation systems at significantly reduced size, power, and overall cost. The ADS1293

delivers a solution that can extend battery life, simplify pr

oduct design and improve overall

performance.

The ADS1299 is a low-noise, multichannel, 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 ADS1299 incorporates all commonly-required

features for electroencephalogram (EEG) applications. With its high levels of integration and

exceptional performance, the ADS1299 enables the creation of scalable medical instru-

mentation systems at significantly reduced size, power, and overall cost.

Key Features

• ThreehighresolutiondigitalECGchan-

nels with simultaneous pace output

•

EMIhardenedinputs

• Lowpower:0.3mW/channel

• Input-referrednoise:7µVpp

(40 Hz bandwidth)

•

Inputbiascurrent:175pA

• Datarate:upto25.6ksps

• Differentialinputvoltagerange:±400mV

• Analogsupplyvoltage:2.7Vto5.5V

• DigitalI/Osupplyvoltage:1.65Vto3.6V

Applications

• Low-powermedical,sports,andfitness

electrocardiogram (ECG) applications

Key Features

• Eightlow-noisePGAsandeighthigh-

resolution simultaneous-sampling ADCs

• Verylowinput-referrednoise:

• 1.0µVPP(70-HzBW)

• Lowpower:5mW/channel

• Inputbiascurrent:300pA

• Datarate:250SPSto16kSPS

• CMRR:–110dB

• Programmablegain:1,2,4,6,8,12,or24

• Built-inoscillator

Applications

• Electroencephalogram (EEG) applications

Get more information: www.ti.com/product/ADS1293

Get more information: www.ti.com/product/ADS1299

ADS1293 diagram

ADS1299 functional diagram

MCUAFE Wireless

Power

Battery