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ADS1298: Complete family of Analog Front Ends for ECG/EEG

All devices in the ADS1298 family have low-noise programmable gain amplifiers (PGAs), test signals, a right leg drive amplifier, oscillator, voltage reference and lead-off detection function to simplify design, while significantly reducing board space requirements and cutting power consumption.

ADS1298 | ADS1299 | ADS1293 | ADS1298 Family Table

ADS1293 provides up to 85% lower power consumption in battery powered ECG applications


For battery powered healthcare patient monitoring system designers who want an integrated solution that is easy to use, high performance, and low power, TI’s ADS1293 is an integrated three-channel analog front end for biopotential measurements that provides very low power consumption with low noise. The ADS1293 delivers a solution that can extend battery life, simplify product design and improve overall performance. The ADS1293 incorporates all features commonly required in portable, low-power medical electrocardiogram (ECG), sports, and fitness applications. With high levels of integration and exceptional performance, the ADS1293 enables the creation of scalable medical instrumentation systems at significantly reduced size, power and overall cost.

ADS1293 ADS1293 Block Diagram
ADS1293 Block Diagram
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ADS1293 Specifications

ADS1293 Parametrics
Resolution (Bits) 24
# Input Channels 3
PGA Gain Setting (typ) (V/V) 3.5
Input-Referred Noise (typ) (uVpp) 7
Sample Rate (Max) (kSPS) 25.6
IVDD Supply Current (typ) (mA) 0.10
IVDDIO Supply Current (typ) (mA) 10
Power/Channel (typ) (mW) 0.30
Power Consumption (typ) (mW) 0.90
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ADS1299: The world’s lowest noise AFE for EEG applications


Illustration: ADS1299The ADS1299 is the industry's lowest noise AFE for the EEG market. Due to the extremely low input-referred noise of the ADS1299, it allows for direct interface to EEG bio-potential signals. With a typical noise of 1µVP-P and a 70Hz input bandwidth, this is a 77% reduction in currently existing medical AFEs.

Before such a low input-referred noise option existed, designers would have to discretely lay out ICs to accommodate an EEG signal, due to the signal amplitude only being 10µV-100µV. In a typical 32-electrode EEG system, about 149 ICs would have to be used to realize the full analog signal chain. With the ADS1299, only four of the ADS1299 devices would have to be used, resulting in a 97% reduction in overall ICs used, making it the only one-chip solution for the EEG signal chain.  This fact, combined with the easy-to-use SPI interface that allows for daisy-chaining, enables a fully realized analog signal chain that greatly reduces board complexity for EEG designers.


ADS1299 Specifications

ADS1299 Parametrics
Resolution (Bits) 24
# Input Channels 8
PGA Gain Setting 1, 2, 4, 6, 8, 12, or 12
Input-referred Noise (typ) 1µVpp
Common-Mode Rejection Ratio (CMRR) (typ) -120dB
Analog Voltage AV/DD Range 4.75V-5.25V
Signal-to-noise Ratio (SNR) (typ) 121dB
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ADS1298: Complete family of Analog Front Ends for ECG/EEG


Analog Front End ChipTI is the first to provide a complete family of electrocardiography (ECG) and electroencephalography (EEG) AFEs for applications ranging from portable to diagnostic- and research-grade systems. All devices in the ADS1298 family have low-noise programmable gain amplifiers (PGAs), test signals, a right leg drive amplifier, oscillator, voltage reference and lead-off detection function to simplify design, while significantly reducing board space requirements and cutting power consumption. This level of integration enables customers to focus development efforts on firmware, FDA approvals, field testing and more, rather than hardware design.



ECG Block Diagram
ADS1298 Block Diagram
ADS1298 Block Diagram
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Guides

Medical Applications GuideMedical Applications Guide

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Analog Signal Chain GuideAnalog Signal Chain Guide

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Family Table

Device Res. (Bits) Sample Rate (kSPS) No. of Input Channels Respiration Input-referred noise (µVpp) CMRR (dB) Power (mW) Interface Package(s) Price/
1ku
 
ADS1299 24
8 Diff
1 110 5 SPI TQFP $ 36.00 Order SamplesSample
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ADS1298 24 32 8 Diff No 3 115 6 SPI BGA-64, TQFP-64 $ 23.95 Order SamplesSample
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ADS1298R 24 32 8 Diff Yes 3 115 6 SPI BGA-64 $ 23.95 Order SamplesSample
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ADS1198 16 8 8 Diff No 12.2 105 4.3 SPI BGA-64, TQFP-64 $ 14.35 Order SamplesSample
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ADS1296 24 32 6 Diff No 3 115 5.3 SPI BGA-64, TQFP-64 $ 17.95 Order SamplesSample
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ADS1296R 24 32 6 Diff Yes 3 115 5.3 SPI BGA-64 $ 17.95 Order SamplesSample
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ADS1196 16 8 6 Diff No 12.2 105 3.6 SPI BGA-64, TQFP-64 $ 11.35 Order SamplesSample
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ADS1294 24 32 4 Diff No 3 115 4.1 SPI BGA-64, TQFP-64 $ 11.95 Order SamplesSample
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ADS1294R 24 32 4 Diff Yes 3 115 4.1 SPI BGA-64 $ 11.95 Order SamplesSample
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ADS1194 16 8 4 Diff No 12.2 105 3 SPI BGA-64, TQFP-64 $ 7.80 Order SamplesSample
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ADS1293 24 25 4 Diff No 7 100 0.90 SPI LLP-28 $ 5.50 Order SamplesSample
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ADS1292 24 8 2 Diff No 8 105 0.67 SPI TQFP-32 $ 3.50 Order SamplesSample
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ADS1292R 24 8 2 Diff Yes 8 105 0.67 SPI TQFP-32 $ 4.50 Order SamplesSample
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ADS1192 16 8 2 Diff No 24 105 0.67 SPI TQFP-32 $ 2.50 Order SamplesSample
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ADS1291 24 8 1 Diff No 8 105 0.45 SPI TQFP-32 $ 2.00 Order SamplesSample
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ADS1191 16 8 1 Diff No 24 105 0.45 SPI TQFP-32 $ 1.50 Order SamplesSample
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