Brainwave Chip Cuts Noise By 75%

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Texas Instruments’ ADS1299 24-bit, eight-channel electroencephalography (EEG) analog front end (AFE) emerges as the first simultaneously sampling EEG AFE with input-referred-noise as low as 1 mV p-p (see the figure). This, according to the company, is more than 75% lower than the alternative EEG AFEs.


Texas Instruments’ ADS1299 24-bit, eight-channel EEG AFE emerges as the first simultaneously sampling EEG AFE with input-referred-noise as low as 1 mV p-p.

Providing non-invasive brainwave monitoring, the device functions in EEG equipment to monitor bispectral index, evoked potentials, and event-related potentials to diagnose brain injuries, strokes, and sleep disorders. It’s also viable for use in ultra-high performance diagnostic and research-grade electrocardiogram (ECG) equipment. And, with an eye on the eternal race to save space, the device trims board space by 70% while reducing the bill of materials by 40% when used in a 32-electrode EEG.

Integration levels are pretty impressive, counting eight low-noise programmable gain amplifiers, eight high-resolution analog-to-digital converters, a bias amplifier, an oscillator, and a reference. Specs are equally notable. These include an input-referred noise figure as low as 1 mVp-p at 70-Hz bandwidth and a common mode rejection ratio of –120 dB.

The ADS1299 is pin compatible with the ADS1298 family’s eight-channel ADS1298, ADS1298R, and ADS1198, the six-channel ADS1296, ADS1296R, and ADS1196, and the four-channel ADS1294, ADS1294R, and ADS1194. A performance demonstration kit, the ADS1299EEG-FE, includes evaluation software, analysis tools like an oscilloscope, FFT and histogram displays, flexible input configurations; optional external reference circuits. It also can export data in basic test files for post processing. Also, an IBIS model to verify board signal integrity requirements is available.

Residing in a 10- by 10-mm quad flat pack (QFP), price for the ADS1299 is $36 each in 1000-piece quantities.

Texas Instruments

Discuss this Blog Entry 2

josefclare (not verified)
on Apr 26, 2013

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on Apr 17, 2014

Texas Instruments one of the leading electronic equipment company in United States had introduced a new device known as brain wave chip. According to the company, microneedle derma roller these chips can be used in circuits successfully and it will reduce the sound in the circuit.

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